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`I.
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`Paper 9
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`UNITED STATES PATENT AND TRADEMARK OFFICE
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`_____________
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`BEFORE THE PATENT TRIAL AND APPEAL BOARD
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`____________
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`AMNEAL PHARMACEUTICALS LLC AND
`AMNEAL PHARMACEUTICALS OF NEW YORK, LLC,
`Petitioner,
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`v.
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`ALLERGAN, INC.
`Patent Owner
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`____________
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`IPR2018-00608
`Patent 9,161,926 B2
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`PATENT OWNER PRELIMINARY RESPONSE
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`INTRODUCTION
`The Petition should be denied because (a) Petitioner presents no
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`evidence that the claimed copolymer was known to be capable of replacing
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`Garrett’s Carbopol to form microparticulate dapsone; (b) Petitioner ignores
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`Nadau-Fourcade’s express teaching to avoid crystallization; and (c) Petitioner
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`fails to show that evidence it relies on is prior art.
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`Patent Owner Preliminary Response
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`IPR2018-00608
`Patent 9,161,926 B2
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`I.
`II.
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`TABLE OF CONTENTS
`INTRODUCTION ................................................................................ 1
`DISCUSSION OF CHALLENGES ..................................................... 2
`A. Ground 1 — Garrett and Nadau-Fourcade ..................................2
`1.
`Petitioner does not show that the claimed copolymer
`was known to have the properties required for it to
`replace Garrett’s Carbopol. ...............................................2
`Petitioner offers no evidence to show a reasonable
`expectation of success to form microparticulate
`dapsone with the claimed copolymer. ..............................8
`Nadau-Fourcade teaches away from Garrett’s
`microparticulate dapsone by insisting on no
`crystallization. ................................................................ 13
`Ground 2 — Garrett and Bonacucina ...................................... 14
`1.
`Bonacucina does not remedy Petitioner’s failure to
`present evidence that the claimed copolymer was
`known to be capable of “playing a role” in
`microparticulate dapsone formation. ............................. 14
`Petitioner relies on Exhibit 1026 in its obviousness
`case but fails to show that it is a prior-art printed
`publication...................................................................... 16
`III. THE PTAB MAY STILL DENY OR CRITIQUE
`INDIVIDUAL GROUNDS UNDER SAS .......................................... 18
`IV. CONCLUSION .................................................................................. 19
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`2.
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`3.
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`B.
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`2.
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`i
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`Patent Owner Preliminary Response
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`IPR2018-00608
`Patent 9,161,926 B2
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`II. DISCUSSION OF CHALLENGES
`A. Ground 1 — Garrett and Nadau-Fourcade
`1. Petitioner does not show that the claimed copolymer was
`known to have the properties required for it to replace
`Garrett’s Carbopol.
`Petitioner argues that Garrett’s Carbopol® 980 carbomer (“Carbopol”)
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`could have been replaced by Sepineo P 600 (“Sepineo”) because Sepineo was
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`known to include the claimed acrylamide/sodium acryloyldimethyl taurate
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`copolymer (“copolymer”) and was included in a list of gelling agents with
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`Carbopol by Nadau-Fourcade. Pet. 31–32. But Petitioner presents no
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`evidence that a person of ordinary skill in the art would have known that the
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`claimed copolymer possessed properties that made it a suitable substitute for
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`Garrett’s Carbopol. Petitioner thus fails to demonstrate a rationale in the prior
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`art for its proposed modification.
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`Garrett expressly teaches that it is the addition of the Carbopol
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`“thickener component” to the dapsone component of its gel formulation that
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`“immediately result[s] in the formation of crystalline microparticles.”
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`Ex. 1004, 24:33–34.1 Petitioner’s witness Dr. Michniak-Kohn agrees,
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`Patent Owner Preliminary Response
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`testifying that Garrett’s Carbopol is the “thickening agent” and that “the
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`thickening agent plays a role in the formation of the microparticulate
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`dapsone.” Ex. 1002 ¶¶ 81–82 (cited at Pet. 46, 47).
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`Petitioner offers no evidence, however, that its proposed Carbopol
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`substitute—Sepineo (a product which includes the claimed copolymer)—was
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`also recognized at the time of the invention as being capable of “play[ing] a
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`role” in the formation of microparticulate dapsone. Petitioner’s evidence
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`shows, at best, that Sepineo was included with Carbopol in Nadau-Fourcade’s
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`listing of gelling agents, e.g. Pet. 32 (citing Ex. 1005, 47:12–32 and 48:1–7),
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`but not that these agents were known to be interchangeable for the function of
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`dapsone microparticulate formation.
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`Petitioner cites prior cases for the unremarkable proposition that
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`“[w]here two known alternatives are interchangeable for a desired function,
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`an express suggestion to substitute one for the other is not needed to render a
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` Patent Owner follows Petitioner’s convention of citing exhibits by page
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`numbers added to the exhibits by Petitioner, instead of to page numbers
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`already present in the document.
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`substitution obvious.” Pet. 32 (citations omitted). But Petitioner has not in
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`Patent Owner Preliminary Response
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`fact offered any evidence that Carbopol and Sepineo were known alternatives
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`interchangeable for the function that Garrett and Petitioner demand of
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`Carbopol, specifically, dapsone microparticulate formation.
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`Even if Carbopol and Sepineo were “interchangeable for use in a topical
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`composition with a water-insoluble drug,” as Dr. Michniak-Kohn asserts
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`without evidentiary support (Ex. 1002 ¶ 57), Petitioner cites no evidence that
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`they were “interchangeable” for the specific function that the Carbopol is
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`called upon to perform: dapsone microparticulate formation. Without putting
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`forward evidence that Sepineo was known to be capable of this function,
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`Petitioner provides no basis to argue that one of ordinary skill in the art even
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`would have thought of Sepineo as a potential substitute for Carbopol in
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`forming microparticulate dapsone.
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`Although Petitioner bases its arguments on Garrett’s microparticulate
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`dapsone reservoir embodiments, Petitioner does not establish a reason to
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`modify the very component that it says “plays a role” in triggering those
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`reservoirs. Ex. 1002 ¶ 81 (cited at Pet. 46–47). Petitioner acknowledges that
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`Garrett
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`teaches a “ ‘pharmaceutical carrier
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`system comprising a
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`dermatological composition that is a semi-solid aqueous gel, wherein dapsone
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`is dissolved in the gel such that the dapsone has the capacity to cross the
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`Patent Owner Preliminary Response
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`stratum corneum layer of the epidermis, and wherein the composition also
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`contains dapsone in a microparticulate state that does not readily cross the
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`stratum corneum of the epidermis.’ ” Pet. 21–22, 23 (citing Ex. 1004, Abs.)
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`(emphasis added); see id. at 13 (citing Ex. 1004, 3:20–26); Ex. 1002 ¶¶ 44, 81
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`(citing Ex. 1004, 17:24–26, 24:33–34).
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`Indeed, Garrett’s very goal is to “minimiz[e] the hematologic effects
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`associated with oral dapsone treatment” in patients with an enzyme deficiency
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`by ensuring that “microparticulate dapsone will be retained in or above the
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`stratum corneum and will therefore serve as a reservoir or provide drug action
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`in the supracorneum zone.” Ex. 1004, 11:22–27 (cited, e.g., at Pet. 12).
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`Garrett explains, for its topical dapsone gels in particular, that “the
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`composition exhibits an optimal balance between dissolved dapsone that is
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`available to cross through the stratum corneum to become systemically
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`available, and microparticulate dapsone that is retained in or above the stratum
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`corneum to serve as a reservoir or to provide dapsone to the supracorneum
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`zone.” Id. at 12:8–12 (cited, e.g., at Pet. 11). As stated by Petitioner’s witness
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`Dr. Michniak-Kohn, when Carbopol was added to the dapsone component in
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`Garrett’s gel formulation example, it “immediately result[ed] in the formation
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`of crystalline microparticles.” Ex. 1002 ¶ 81 (citing Ex. 1004, 24:33–34); see
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`id. ¶ 44 (citing Ex. 1004, 17:24–26).
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`Petitioner asserts that “it would have been obvious to a POSA to
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`substitute the claimed acrylamide copolymer for the thickening agent
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`disclosed in Garrett because such thickening agents were known to be
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`predictable and interchangeable.” See Pet. 31. But Garrett teaches that its
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`“polymer thickener component” also triggers a dapsone microparticulate
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`reservoir that is central to Garrett’s topical formulation. See supra; see e.g.,
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`Ex. 1004, 11:25–27; 24:33–34 (cited at, e.g., Pet. 12 and Ex. 1002 ¶ 81).
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`Petitioner fails to provide specific evidence addressing why one of ordinary
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`skill in the art would replace a key ingredient that is involved in forming
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`Garrett’s microparticulate reservoir. See Pet. 31–33.
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`Moreover, Garrett reports that its microparticulate dapsone formulation
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`offered an unexpected safety benefit over an earlier formulation. Ex. 1004,
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`10:22–25 (“compositions of the invention . . . demonstrate the unexpected
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`result that treatment of G6PD-deficient patients with the Aczone™ gel, 5%,
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`formulation does not result in adverse hematological effects”). Petitioner does
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`not address Garrett’s unexpected benefits, nor does Petitioner explain why
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`one of ordinary skill in the art would have been motivated to swap out
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`ingredients of a topical composition reported to have unexpected benefits. See
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`Leo Pharm. Prods. v. Rea, 726 F.3d 1346, 1355–56 (Fed. Cir. 2013)
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`(specifically addressing the lack of motivation to replace ingredients in
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`surprisingly effective topical formulations). Notably, Petitioner does not even
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`address whether its asserted replacement—Sepineo—would have been known
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`or expected to confer the triggering function that Garrett required.
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`Petitioner’s further contentions that “both [Garrett and Nadau-
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`Fourcade] relate to topical pharmaceutical compositions of drugs that are
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`insoluble in water,” and “modifying the amount of a thickening agent is well-
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`known and routine in the development of topical compositions, and would
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`have had a known impact on the viscosity” also fall short of identifying a
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`rationale to modify Garrett. Pet. 31, 34 (Ground 1); see also 49–50 (Ground
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`2). In particular, Petitioner makes no showing that one of ordinary skill in the
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`art would have undertaken the replacement of Garrett’s microparticulate
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`reservoir trigger on the basis that the modified formulation would be “routine”
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`relative to Garrett’s extant formulation. “[O]bviousness concerns whether a
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`skilled artisan not only could have made but would have been motivated to
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`make the combinations or modifications of prior art to arrive at the claimed
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`invention.” Belden v. Berk-Tek LLC, 805 F.3d 1064, 1073 (Fed. Cir. 2015)
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`(emphasis in original). In any event, Petitioner’s assertions that these
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`modifications would have been “routine” are unsupported by evidence and
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`also contradict Petitioner’s argument that even “small variations” in a
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`microparticulate composition can affect its properties. Pet. 58 (discussed
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`infra at p. 10).
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`2. Petitioner offers no evidence to show a reasonable
`expectation of success to form microparticulate dapsone
`with the claimed copolymer.
`Petitioner similarly fails to present evidence that one of ordinary skill
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`would have had a reasonable expectation of success in making the proposed
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`modification. Garrett emphasizes that its main purpose is to provide a
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`reservoir of undissolved dapsone. Ex. 1004, 11:24–27 (explaining that
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`microparticulate dapsone “serve[s] as a reservoir”). Petitioner proposes
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`replacing the very ingredient that Garrett, Petitioner, and Dr. Michniak-Kohn
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`agree “plays a role” in forming that reservoir: the Carbopol. Ex. 1002 ¶ 81
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`(cited at Pet. 46, 47); see Ex. 1004, 11:24–27. Yet Petitioner has not shown
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`that Carbopol and Sepineo, although both identified by Nadau-Fourcade as
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`gelling agents, were known to be interchangeable for the function of
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`triggering microparticulate dapsone formation.
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`In the absence of such evidence, Petitioner fails to show that a person
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`of ordinary skill would have had a reasonable expectation of successfully
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`obtaining Garrett’s microparticulate dapsone by using the claimed copolymer
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`in Sepineo. See Procter & Gamble v. Teva Pharm., 566 F.3d 989, 994 (Fed.
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`Cir. 2009) (challenger must demonstrate that “a skilled artisan would have
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`been motivated to combine the teachings of the prior art references to achieve
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`the claimed invention, and . . . would have had a reasonable expectation of
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`success in doing so”). For at least this reason, Petitioner fails to demonstrate
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`a reasonable likelihood of prevailing on any claim under either asserted
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`ground.
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`Petitioner instead merely asserts that one of ordinary skill would have
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`had a reasonable expectation of success because “Garrett’s thickening agents
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`and the acrylamide copolymer are known thickening agents being used in their
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`known amounts for their intended purpose—to thicken the composition and
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`stabilize the undissolved dapsone.” Pet. 37. But Petitioner’s argument here
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`ignores the evidence it relies on elsewhere that the Carbopol is intended to
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`“play[] a role” in the formation of the microparticulate dapsone. Ex. 1002 ¶
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`81 (cited at Pet. 46, 47). Petitioner nowhere demonstrates, or even alleges,
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`that the claimed copolymer was known to be capable of fulfilling an “intended
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`purpose” of microparticulate dapsone formation. Whether a person of
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`ordinary skill in the art could have used the claimed copolymer in a known
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`amount for its disclosed purpose as a gelling agent is irrelevant to the question
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`of whether that person would have had a reasonable expectation of success in
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`using it for forming microparticulate dapsone, a purpose that Petitioner has
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`not demonstrated was known.
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`Petitioner and Dr. Michniak-Kohn even admit that “small variations in
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`the preparation of the composition can affect the properties (e.g., particle size,
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`polymorph) of a resulting recrystallized precipitate” (Pet. 58, citing Ex. 1002
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`¶¶ 102–03), yet they fail to address how the complete replacement of a key
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`ingredient reasonably would have been expected not to alter the resulting
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`formulation’s properties.
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`Petitioner points out no disclosure in Garrett or in Nadau-Fourcade
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`relating to how one of ordinary skill reasonably would have expected that the
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`claimed copolymer could play a role in forming a microparticulate reservoir.
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`Notably, Nadau-Fourcade specifically seeks
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`to avoid crystallization.
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`Ex. 1005, 41:13–14 (explaining that its claimed compositions have “no
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`crystallization of the active ingredient” visible even on microscopic
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`examination); infra Section II(A)(3) at p. 13. Consistent with this directive,
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`Nadau-Fourcade provides no teaching that its “gelling agent” ingredients
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`function as an active ingredient microparticulate trigger. See, e.g., Ex. 1005,
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`47:12–48:7.
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`Dr. Michniak-Kohn reinforces Petitioner’s hindsight-driven analysis
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`by entirely omitting consideration of one of Nadau-Fourcade’s preferred
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`gelling agent families—polysaccharides—and instead plucking out only the
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`claimed element as the asserted replacement for Garrett’s formulation. See
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`Ex. 1002 ¶¶ 56–57; see Ex. 1005, 48:5–7 (“Preferred gelling agents include
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`carbomers, for instance Carbopol 980® or 981®, polyacrylamides, for instance
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`Sepineo P 600® or Simulgel 600 PHA®, and polysaccharides, for instance
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`xanthan gum.”). And although Dr. Michniak-Kohn alleges that Carbopol and
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`Sepineo were known to be “interchangeable for use in a topical composition
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`with a water-insoluble drug” from Nadau-Fourcade, she provides no citation
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`support for this position. Ex. 1002 ¶ 57.
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`Petitioner’s reliance on references not even asserted in its statutory
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`Grounds is equally unavailing. E.g., Pet. 11, 37, 50–52, 57 (discussing Guo,
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`Ex. 1013); id. at 37, 47, 49, 50, 52, 53 (discussing Sepineo brochure,
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`Ex. 1026). Petitioner argues that one of ordinary skill in the art “knew from
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`Guo that dapsone compositions were compatible with concentrations of about
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`1% w/w to about 10% w/w of the acrylamide copolymer.” Pet. 52 (citing
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`Ex. 1013); see also id. at 37. Yet Guo does not even mention the claimed
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`copolymer. See, e.g., Ex. 1013 ¶ 200. Petitioner further states that Sepineo
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`was “known in 2012 to be generally compatible with a wide variety of
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`conditions.” Pet. 37 (citing Ex. 1026 (“Sepineo brochure”)); id. at 52 (citing
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`same). Consistent with the discussion of the record evidence above, however,
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`neither Guo nor the Sepineo brochure teaches that the copolymer triggers
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`microparticulate dapsone formation. See Ex. 1013; Ex. 1026 (which, as
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`discussed below in Section II(B)(2) on page 16 has not even been shown to
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`be a prior-art printed publication).
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`Nor do these references discuss how Garrett’s formulation might have
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`been modified to address the characteristics of Sepineo, yet preserve the
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`microparticulate reservoir. Rather, Nadau-Fourcade discloses Sepineo as a
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`gelling agent, without mentioning any properties it might have had with
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`respect to drug crystal formation. Indeed, as mentioned previously and
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`detailed below, Nadau-Fourcade expressly seeks to avoid crystalline
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`formation in its formulations. Ex. 1005, 41:13–14; infra subsection 3.
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`For these reasons, Petitioner has failed to demonstrate that one of
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`ordinary skill in the art reasonably would have expected that replacing
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`Garrett’s microparticulate dapsone-triggering Carbopol in favor of Sepineo
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`could have achieved the claimed invention.
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`3. Nadau-Fourcade teaches away from Garrett’s
`microparticulate dapsone by insisting on no
`crystallization.
`Petitioner’s Ground 1 challenge fails for the additional reason that the
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`Petition does not account for Nadau-Fourcade’s directive to avoid
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`crystallization of the active ingredient in its topical formulations. As a result,
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`Petitioner cannot establish that one of ordinary skill in the art would have had
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`any rationale for modifying Garrett’s crystallized active microparticulate
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`formulations based on Nadau-Fourcade.
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`Petitioner acknowledges that Garrett’s topical gel formulations require
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`crystallization, see supra Section II(A)(1) at p. 5, but does not address the
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`express instruction in Nadau-Fourcade to avoid crystallization entirely. In
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`particular, Nadau-Fourcade reports:
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`The problem that this invention proposes to solve herein is
`thus to develop an aqueous pharmaceutical composition of an
`oil-in-water emulsion
`type, which
`is physically and
`chemically stable and contains at least one water-sensitive
`active ingredient, in dissolved form. . . . The term ‘dissolved
`form of the active ingredient’ means a dispersion of the active
`ingredient
`in molecular form
`in a
`liquid, with no
`crystallization of the active ingredient being visible to the
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`naked eye or even under a cross-polarized optical microscope.
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`Ex. 1005, 40:28–30, 41:12–14 (emphases added); see id. at 39:16–18
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`(“degradation and/or crystallization of the active ingredient . . . runs counter
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`to the desired objective”).
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`Petitioner fails to explain how one of ordinary skill in the art would
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`have reconciled Nadau-Fourcade’s express teaching against crystallization
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`with Garrett’s express teaching for crystallization. Petitioner asserts that both
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`Garrett and Nadau-Fourcade “relate to topical pharmaceutical compositions
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`of drugs and are within the pertinent art.” Pet. 31. However, because a
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`combination of Garrett and Nadau-Fourcade would render both references
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`unsuitable for their respective intended purposes, the Petition falls short of
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`showing the ordinarily skilled artisan had sufficient reason to combine them.
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`See In re Gordon, 733 F.2d 900, 902 (Fed. Cir. 1984) (proposed modification
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`cannot render the prior art unsatisfactory for its intended purpose).
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`For these reasons, Ground 1 should be denied.
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`B. Ground 2 — Garrett and Bonacucina
`1. Bonacucina does not remedy Petitioner’s failure to
`present evidence that the claimed copolymer was known
`to be capable of “playing a role” in microparticulate
`dapsone formation.
`As discussed above in Sections II(A)(1)–(2) on pages 2–10, Petitioner
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`fails to cite any evidence that one of ordinary skill would have known that the
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`claimed copolymer was capable of “playing a role” in the formation of
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`microparticulate dapsone. Consequently, no evidence supports Petitioner’s
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`assertions that one of ordinary skill would have had any reason (a) to replace
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`Garrett’s Carbopol with a material not known to be able to replicate
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`Carbopol’s role in microparticulate dapsone formation, or (b) reasonably to
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`expect that such a substitution would work. Bonacucina supplies none of the
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`missing evidence.
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`Dr. Michniak-Kohn asserts that: “Both Garrett’s thickening agent,
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`Carbopol® 980, and acrylamide/sodium acryloyldimethyl taurate copolymer
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`are known thickening agents being used in their known amounts for their
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`intended purpose: to thicken the composition and stabilize the undissolved
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`dapsone. (AMN1029, 1.)” Ex. 1002 ¶ 90. Yet the only support Dr. Michniak-
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`Kohn provides for this statement is the Kim article (Ex. 1029), which neither
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`mentions the copolymer nor addresses the alleged purpose of stabilizing
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`undissolved actives. See Ex. 1029, 1 (study of Carbopol rheology and
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`structure). Here, as with Ground 1, Petitioner fails to demonstrate any
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`guidance concerning Sepineo’s function, or other information pertaining to
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`Sepineo’s interaction with dapsone, or why one of ordinary skill reasonably
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`would have expected such a formulation to be successful.
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`Bonacucina is devoid of any description of Sepineo’s interaction with
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`an active component. Tellingly, in Ground 2 Petitioner does not rely on either
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`Garrett or Bonacucina for its assertion of a reasonable expectation of
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`successfully using the claimed copolymer. Petitioner instead relies on
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`evidence not cited in the challenge, some of which it does not even show to
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`be prior art. See Pet. 51–53; infra subsection 2. Bonacucina contains no
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`teaching of an active ingredient, much less Sepineo’s function with regard to
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`any active. Instead, Bonacucina confines itself to “characteriz[ing] the
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`Sepineo gel systems as well as to study how the addition of oil affects gel
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`characteristics” without actives present. Ex. 1015, 7. Bonacucina does not
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`address how Sepineo would behave in the presence of dapsone or other
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`actives.
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`2. Petitioner relies on Exhibit 1026 in its obviousness case
`but fails to show that it is a prior-art printed publication.
`Petitioner relies repeatedly in Ground 2 on a document it has not shown
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`to be prior art: the “Sepineo brochure” filed as Exhibit 1026. Petitioner has
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`presented no evidence that the Sepineo brochure is a prior-art printed
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`publication published before the effective filing date of the ’926 patent.
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`Petitioner bears “the initial burden of production” to establish the existence of
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`prior art on which it relies. Dynamic Drinkware, LLC v. Nat’l Graphics, Inc.,
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`Patent Owner Preliminary Response
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`800 F.3d 1375, 1378–79 (Fed. Cir. 2015); see, e.g., Mylan Pharm. v.
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`Boehringer Ingelheim Int’l GmbH, IPR2016-01566, Paper 15 at 10–12 (Feb.
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`3, 2017) (denying institution because petitioner had not shown that purported
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`“printed package insert” was a printed publication); Frontier Therap., LLC v.
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`Medac Ges. Fur Klinische Spezial. MBH, IPR2016-00649, Paper 10 at 22
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`(Sep. 1, 2016) (same).
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`Petitioner relies on the Sepineo brochure to assert that a person of
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`ordinary skill would have known that (a) Sepineo has properties making it
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`desirable for topical use (see Pet. 47); (b) up to 5% w/w Sepineo is useful
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`(id. at 49, 50); and (c) Sepineo is compatible with a wide variety of solvents
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`and tolerates wide pH and temperature ranges (id. at 52–53). Petitioner cites
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`no other documentary evidence in support of any of these assertions, aside
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`from passing references to Bonacucina . Dr. Michniak-Kohn similarly relies
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`on the Sepineo brochure and little else to support the same assertions.
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`Ex. 1002 ¶¶ 28, 61, 84, 90.
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`Yet despite its near-exclusive reliance on this document for several
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`elements of its Ground 2 challenge, Petitioner provides no evidence showing
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`that the Sepineo brochure is a prior-art printed publication. Petitioner does
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`not even allege a publication date in its Exhibit List. Paper 3, 3. The Sepineo
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`brochure itself sets forth only the inscription “3664/GB/02/April 2008,” with
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`no explanation of the inscription’s meaning or any indication of the brochure’s
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`source and availability prior to 2012. Ex. 1026, 2. Petitioner offers no
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`evidence to explain the meaning of this inscription, which without more does
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`not prove publication. BMC Medical Co. Ltd. v. ResMed Ltd, IPR2014-
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`01196, Paper 7 at 7 (Dec. 21, 2014) (denying institution where only asserted
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`evidence of publication was an inscription “LK 3/15/01” printed on last page
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`of document).
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`The assertions by Petitioner and Dr. Michniak-Kohn that are supported
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`only by this document therefore are unsupported by any prior-art documentary
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`evidence and should be given little or no weight. 37 C.F.R. § 42.65(a).
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`Because Petitioner relies principally on the Sepineo brochure to support its
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`rationale for combination but has not shown the brochure to be prior art, this
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`ground should be denied.
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`For these reasons, Ground 2 should be denied.
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`III. THE PTAB MAY STILL DENY OR CRITIQUE INDIVIDUAL
`GROUNDS UNDER SAS
`If the Board decides to institute review despite the Petition’s
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`deficiencies, including those identified above, it may still deny an individual
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`ground or explain why it fails to demonstrate a reasonable likelihood of
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`unpatentability. Nothing in SAS Institute Inc. v. Iancu, --- U.S. ---
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`(No. 16-969, Apr. 24, 2018) prevents the Board from doing so. Such guidance
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`from the Board would help the parties prioritize arguments and marshal
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`resources efficiently, should review be instituted.
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`IV. CONCLUSION
`For the foregoing reasons, the Board should deny institution of inter
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`partes review for the ’926 patent.
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`Dated: June 8, 2018
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`Respectfully submitted,
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` /Scott E. Kamholz/
`Scott E. Kamholz, Reg. No. 48,543
`Jessica L. Parezo, Reg. No. 50,286
`Covington & Burling LLP
`One CityCenter
`850 Tenth Street, NW
`Washington, DC 20001
`Phone: (202) 662-5339
`Fax: (202) 778-5339
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`Counsel for Patent Owner
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`CERTIFICATE OF WORD COUNT
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`Patent Owner Preliminary Response
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`Pursuant to 37 C.F.R. § 42.24(d), I certify that the present paper
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`contains 3,536 words based on the word count indicated by the word-
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`processing program used to generate the paper and excluding those portions
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`exempted by §§ 42.24(a) and (b).
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`Patent Owner Preliminary Response
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`CERTIFICATE OF SERVICE
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`Pursuant to 37 C.F.R. § 42.6, I certify that on the date listed below, a
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`copy of this paper and every exhibit filed with this paper was served on the
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`petitioner by electronic mail to the following counsel of record for Petitioner:
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`Dated: June 8, 2018
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`Dennies Varughese (dvarughe-PTAB@skgf.com)
`Adam C. LaRock (alarock-PTAB@skgf.com)
`PTAB@skgf.com
`Sterne, Kessler, Goldstein & Fox
`1100 New York Avenue, NW
`Washington, DC 20005
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` /Scott E. Kamholz/
`Scott E. Kamholz, Reg. No. 48,543
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