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`UNITED STATES PATENT AND TRADEMARK OFFICE
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`BEFORE THE PATENT TRIAL AND APPEAL BOARD
`_____________________
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`PHIGENIX, INC.
`Petitioner
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`v.
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`IMMUNOGEN, INC.
`Patent Owner
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`_____________________
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`IPR2014-00676
`Patent 8,337,856
`_____________________
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`IMMUNOGEN, INC.’S UPDATED POWER OF ATTORNEY
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`Mail Stop "PATENT BOARD"
`Patent Trial and Appeal Board
`U.S. Patent and Trademark Office
`P.O. Box 1450
`Alexandria, VA 22313-1450
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`ImmunoGen, Inc.'s Updated Power of Attorney
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`Pursuant to 37 C.F.R. § 42.10(b), Patent Owner, ImmunoGen, Inc., having a
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`principal place of business at 830 Winter Street, Waltham, MA 02451-1477, hereby
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`appoints the following practitioners as additional counsel to transact all business in
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`the United States Patent & Trademark Office associated with an interpartes review
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`ofU.S. Patent No. 8,337,856:
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`Address:
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`Byron L. Pickard (Reg. No. 65,172) phone: 202-772-8521
`Olga A. Partington (Reg. No. 65,326) phone: 202472-8626
`STERNE, KESSLER, GOLDSTEIN & Fox P.L.L.C.
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`1100 New York Avenue, NW.
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`Washington, DC 20005
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`202.371.2600 (reception)
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`202.371.2540 (facsimile)
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`eellison-PTAB@skgf.com
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`esteffe-PTAB@skgf.com
`bpickard-PTAB@skgf.com
`0partington—PTAB@skgf.com
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`Eldora L. Ellison (Reg. No. 39,967) and Eric K. Steffe (Reg. No. 36,688) remain
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`counsel for ImmunoGen, Inc.
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`FOR: ImmunoGen Inc.
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`SIGNATURE: 9214 % (QE:¥
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`BY: Jose h J. Kenn
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`‘
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`TITLE: Chief Patent Counsel and Asst. Secretam
`DATE:
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`193/15”
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`CERTIFICATION OF SERVICE (37 C.F.R. § 42.6(e))
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`The undersigned hereby certifies that the above-captioned ImmunoGen,
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`Inc.’s Updated Power of Attorney was served in its entirety on June 19, 2015, upon
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`the following parties via electronic mail:
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`Ping Wang
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`ANDREWS KURTH, LLP
`1350 I Street NW, Suite 1100
`Washington, DC 20005
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`Tel: (202) 662-3042
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`Fax: (202) 662-3729
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`PingWang@andrewskurth.com
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`Gregory Porter
`ANDREWS KURTH, LLP
`600 Travis, Suite 4200
`Houston, TX 77002
`Tel: (713) 220-4621
`Fax: (713) 220-4257
`GregPorter@andrewskurth.com
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` STERNE, KESSLER, GOLDSTEIN & FOX P.L.L.C.
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`/Eldora L. Ellison/
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` Eldora L. Ellison, Ph.D. (Reg. No. 39,967)
`Date: June 19, 2015
` Lead Attorney for ImmunoGen, Inc.
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`1100 New York Avenue, N.W. Washington, D.C.20005-3934
`(202) 371-2600
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`1846325.2
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