CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 1 of 42
`
`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 1 of 42
`
`
`Exhibit 18
`Exhibit 18
`
`Page 1
`
`OWTEx. 2147
`Tennant Company v. OWT
`IPR2021-00625
`
`

`

`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 2 of 42
`
`CASE 0:20-cv-00358-ECT-HB>Oa
`
`025787B
`
`US 8,025,787 B2
`(10) Patent No.:
`a2 United States Patent
`
`Field et al.
`(45) Date of Patent:
`Sep. 27, 2011
`
`(54) METHOD AND APPARATUS FOR
`GENERATING, APPLYING AND
`NEUTRALIZING AN
`ELECTROCHEMICALLYACTIVATED
`LIQUID
`
`(75)
`
`Inventors: Bruce F. Field, Golden Valley, MN
`(US), Patrick J. Gronlund, Somerset
`WIS
`;
`(US)
`
`°
`
`:
`:
`1
`1
`.
`(73) Assignee: Tennant Company, Minneapolis, MN
`(US)
`
`(*) Notice:
`
`Subject to anydisclaimer, the term ofthis
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 1167 days.
`
`(21) Appl. No.: 11/655,415
`
`(22) Tiled:
`
`Jan. 19, 2007
`
`(65)
`
`Prior Publication Data
`US 2007/0187263 Al
`Aug. 16, 2007
`
`(60)
`
`Related U.S. Application Data
`Provisional application No. 60/864,724, filed on Nov.
`7, 2006, provisional application No. 60/815,721, filed
`on Jun. 22, 2006, provisional application No.
`60/815,804,
`filed on Jun. 22, 2006, provisional
`application No. 60/772,104, filed on Feb. 10, 2006.
`
`(51)
`
`Int. Cl.
`(2006.01)
`CO2L 1/461
`(52) U.S.CL.
`........ 205/746; 205/701; 205/755; 205/756;
`: 205/757; 205/498
`305/498_505
`(58) Field of Classification Search
`205/701, 746, 755, 756, 757
`See application file for complete search history.
`
`(56)
`
`References Cited
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`Primary Examiner — Arun S Phasge
`(74) Aitorney, Agent, or Firm
`avid 1). Brush; Westman,
`Champlin & Kelly, P.A.
`37)
`ABSTRACT
`A method and apparatus are provided for receiving a cleaning
`liquid having a pH in a range between pH6-pH8 and an
`oxidation reduction potential (ORP) between +50 mV. The
`liquid is converted into an anolyte liquid and a catholyte
`liquid having respective pHs outside of the range between
`pH6-pH8 and having respective ORPs outside the range
`between +50 mV. The anolyte and catholyte liquids are
`applied to a surface, wherein the anolyte and catholyte liquids
`are, lor example, in a combined state on the surlace and
`substantially neutralize to a pH between pH6-pH8 and an
`ORPbetween #50 mVwithin one minute ofthe time at which
`the anolyte and catholyte liquids are converted.
`19 Claims, 17 Drawing Sheets
`
`Vmad
`
`CELL L6
`FUNCTIONAL
`ELECTROLYSIS
`
`GENERATOR
`
`
`
`ELECTROLYSIS
`CELL
`
`Page 2
`
`OWTEx. 2147
`Tennant Company v. OWT
`IPR2021-00625
`
`

`

`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 3 of 42
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 3 of 42
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`Page 3
`
`OWTEx. 2147
`Tennant Company v. OWT
`IPR2021-00625
`
`

`

`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 4 of 42
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 4 of 42
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`Wo
`2005014058
`2/2005
`Chinese Office Action with English 'lranslation dated Jun. 9, 2010 for
`wo
`2005020780
`3/2005
`corresponding Chinese Application No. 2007800 10434.8, filed Feb.
`WO
`2005079468
`9/2005
`8, 2007.
`WO
`2005093 129
`10/2005
`JP-HC 15022149.
`wo
`2005094904
`10/2005
`“Conductive Polymers: Evaluation of Industrial Applications” Syn-
`Wo
`2005097350
`10/2005
`thetic Metals. 55-57 (1993) 3623-3631 S. Roth etal.
`WO
`2005012186
`2/2006
`Office Action from the United States Patent and TrademarkOffice for
`WoO
`2006 124805
`11/2006
`U.S. Appl. No. 11/655,390, dated Jan. 19, 2007.
`
`Page 4
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 5 of 42
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 5 of 42
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`US 8,025,787 B2
`Page 4
`
`or
`
`or
`
`or
`
`or
`
`for
`
`or or
`
`
`
`Office Action [rom the United States Patent and Trademark Office for
`U.S. A ppl. No. 11/655,365, dated Dec. 3, 2010.
`Final Office Action from the United States Patont and Trademark
`Office lor U.S. Appl. No. 11/655,378, dated Jan. 25, 2011,
`Office Action from the United States Patent and Trademark Office for
`US. A
`ppl. No. 11/655,359, dated Feb. 3, 2011.
`Notice
`of Allowance from the United States Patent and Trademark
`Office
`for U.S. Appl. No. 12/122,350, dated Mar. 16, 2011.
`Notice
`of Allowance from the United States Patent and Trademark
`Office
`for U.S. Appl. No. 11/655,389, dated. Mar. 17, 2011.
`Notice
`of Allowance from the United States Patent and Trademark
`Office
`or U.S. Appl. No. 11/655,360, dated Mar. 18, 2011.
`Nolice
`of Allowance from the Uniled States Patent and Trademark
`Office
`or U.S. Appl. No. 11/655.310, dated Mar. 23, 2011.
`English Translation ofJapanese Office Action dated May 25, 2011 for
`corresponding Japanese Application No. 2008-554350.
`Notice
`ofAllowability from the United. States Patent and Trademark
`Office
`or U.S. Appl. No. 11/655,378, dated Apr. 28, 2011.
`Notice
`of Allowance from the United States from the United States
`Patent
`and Trademark Office for U.S, Appl. No. 11/655,378, dated.
`May10, 2011.
`English ‘lranslation of Japanese Office Action dated Jun. 17,2011 for
`Japanese Patent Application No. 2008-554363.
`English Translation ofJapanese Office Action dated May 3 1, 201 | for
`Japanese Patent Application No. 2008/554377.
`
`* cited by examiner
`
`
`
`
`
`
`
`
`
`Office Action from the United States Patent and Trademark Office
`U.S. Appl. No. 11/655,359, dated Mar. 19, 2009.
`Restriction Requirement from the United. States Patent and Trade-
`mark Office for Appl. No. 11/655,390, dated Apr. 10, 2009.
`or
`Office Action from the United States Patent and Trademark Office
`USS. Appl. No. 11/655,390, dated Jul. 16, 2009.
`Office Action from the United States Patent and Trademark Office
`USS. Appl. No. 11/655,359, dated Nov. 13, 2009,
`Notice of Allowance from the United States Patent and Trademark
`Office for U.S. Appl. No. 11/655,390, dated Jan. 6, 2011.
`Office Action from the United States Patent and Trademark Office
`USS. Appl. 11/655,390, dated Jul. £9, 2010.
`Restriction/Election Requirement from the United States Patent and
`7,
`Trademark Office for U.S. Appl. No. 11/655,365, dated Aug.
`2010.
`or
`Office Action from the United States Patent and Trademark Office
`U.S. Appl. No. 11/655,359, dated Aug. 18, 2010.
`Office Action from the United States Patent and Trademark Office
`USS. Appl. No. 1 1/655,378, dated Sep. 9, 2010.
`Office Action from the United States Patent and Trademark Office
`U.S. Appl. No. 11/655,360, dated Sop. 30, 2010.
`Office Action fromthe United States Patent and'lrademark Office
`USS. Appl. No. 12/122,350, dated Sep. 30, 2010.
`Office Action from the United States Patent and Trademark Office
`USS. Appl. No. 11/655,310, dated Oct. 1, 2010.
`Office Action from the United States Patent and Trademark Office
`USS. Appl. No. 11/655,389, dated Oct. 1, 2010.
`
`Page 5
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 6 of 42
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 6 of 42
`
`U.S. Patent
`
`Sep. 27, 2011
`
`Sheet 1 of 17
`
`US 8,025,787 B2
`
`14
`
`LIQUID
`
` Cd
`
`FIG. 1
`
`14
`
`LIQUID
`
`FIG. 2
`
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 7 of 42
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 7 of 42
`
`U.S. Patent
`
`Sep. 27, 2011
`
`Sheet 2 of 17
`
`US 8,025,787 B2
`
`6
`
`
`
`FUNCTIONAL
`GENERATOR
`
`22
`
`
`
`SPARGING
`DEVICE
`
`
`
`16
`
`46
`
`16
`
`SPARGING
`DEVICE
`
`FIG. 3
`
`
`
`FIG. 4
`
`50
`
`
`
`ELECTROLYSIS
`CELL
`
`FUNCTIONAL
`GENERATOR
`
`10
`
`FUNCTIONAL
`GENERATOR
`
`CELL
`
` ELECTROLYSIS
` FUNCTIONAL
`GENERATOR
`
`
`
`Page 7
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 8 of 42
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 8 of 42
`
`U.S. Patent
`
`Sep. 27, 2011
`
`Sheet 3 of 17
`
`US 8,025,787 B2
`
` 60
`
`50 a“
`
`FIG. 7
`
`Page 8
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 9 of 42
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 9 of 42
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`Sep. 27, 2011
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`Sheet 4 of 17
`
`U.S. Patent
`
`US 8,025,787 B2
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`Page 9
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`U.S. Patent
`
`Sep. 27, 2011
`
`Sheet 5 of 17
`
`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 10 of 42
`
`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 10 of 42
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`US 8,025,787 B2
`
`FIG. 9B
`
`Page 10
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 11 of 42
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 11 of 42
`
`U.S. Patent
`
`Sep. 27, 2011
`
`Sheet 6 of 17
`
`US 8,025,787 B2
`
`ANI=
`
`Page 11
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 12 of 42
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 12 of 42
`
`U.S. Patent
`
`Sep. 27, 2011
`
`Sheet 7 of 17
`
`US 8,025,787 B2
`
`100 FIG. 10B
`
`LZ
`
`Page 12
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 13 of 42
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 13 of 42
`
`U.S. Patent
`
`Sep. 27, 2011
`
`Sheet 8 of 17
`
`US 8,025,787 B2
`
`FIG. 10€
`
`Page 13
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 14 of 42
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 14 of 42
`
`U.S. Patent
`
`Sep. 27, 2011
`
`Sheet 9 of 17
`
`US 8,025,787 B2
`
`106
`
`#0 \------- |
`
`
`DETERGENT |
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 15 of 42
`
`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 15 of 42
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`U.S. Patent
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`Sep. 27, 2011
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`Sheet 10 of 17
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`US 8,025,787 B2
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 16 of 42
`
`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 16 of 42
`
`U.S. Patent
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`Sep. 27, 2011
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`

`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 17 of 42
`
`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 17 of 42
`
`U.S. Patent
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`Sep. 27, 2011
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`OWTEx. 2147
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 18 of 42
`
`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 18 of 42
`
`U.S. Patent
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`Sep. 27, 2011
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 19 of 42
`
`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 19 of 42
`
`U.S. Patent
`
`Sep. 27, 2011
`
`Sheet 14 of 17
`
`US 8,025,787 B2
`
`
`
`Page 19
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 20 of 42
`
`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 20 of 42
`
`U.S. Patent
`
`Sep. 27, 2011
`
`Sheet 15 of 17
`
`US 8,025,787 B2
`
`382
`
`384
`
`Page 20
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 21 of 42
`
`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 21 of 42
`
`U.S. Patent
`
`Sep. 27, 2011
`
`Sheet 16 of 17
`
`US 8,025,787 B2
`
`400
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`Page 21
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 22 of 42
`
`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 22 of 42
`
`U.S. Patent
`
`Sep. 27, 2011
`
`Sheet 17 of 17
`
`US 8,025,787 B2
`
`712
`
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`
`716
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`
`Page 22
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 23 of 42
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`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 23 of 42
`
`US 8,025,787 B2
`
`1
`METHOD AND APPARATUS FOR
`GENERATING, APPLYING AND
`NEUTRALIZING AN
`ELECTROCHEMICALLY ACTIVATED
`LIQUID
`
`
`
`
`
`CROSS-REFERENCE TO RELATED
`
`APPLICATIONS
`
`w
`
`This application claimspriority from and the benefit of the
`
`following U.S. Provisional Applications: 60/772,104, filed
`
`Feb. 10, 2006 and entitled “ELECTROCHEMICALLY
`ACTIVATED WATER FOR HARD AND SOFT FLOOR
`CLEANING SYSTEMS;” 60/815,804,filed Jun. 22, 2006
`and
`entitled “ELECTROCHEMICALLY ACTIVATED
`WATER FOR HARD AND SOFT FLOOR CLEANING
`SYSTEMS;” 60/815,721, filed Jun. 22, 2006 and entitled
`“METHOD AND APPARATUS FOR THE GENERATION
`AND USE OF SPARGED ELECTROCIIEMICALLY
`ACTIVATLD LIQUID;”and 60/864.724,filed Nov. 7, 2006 2
`
`and entitled “METIIOD AND APPRATAUS FOR TII
`
`GENERATION AND USE OF ELECTROCHEMICALLY
`ACTIVATED LIQUID WITH VISUAL INDICATOR,”
`which are incorporated herein by reference in their entireties.
`Cross-reference is also made to the following U.S. patent
`applications, which were filed on even date herewith and are
`hereby incorporated by reference in their entireties: U.S.
`application Ser. No. 11/655,365, entitled “CLEANING
`APPARATUS HAVING A FUNCTIONAL GENERATOR
`
`FOR PRODUCING ELECTROCHEMICALLY
`
`ACTI-
`VATED CLEANING LIQUID:” USS. application Ser. No.
`
`
`11/655,389, entitled “METHOD FOR GENERATING
`
`
`ELECTROCIEMICALLY ACTIVATED CLEANING LIQ-
`UID;” U.S. application Ser. No. 11/655,359, entitled
`
`“MOBILE SURFACE CLEANER HAVING A SPARGING ?
`
`DEVICE;” U.S. application Ser. No. 11/655,360, entitled
`“METHOD OF PRODUCING A SPARGED CLEANING
`LIQUID ONBOARD A MOBILE SURFACE CLEANER;”
`USS. application Ser. No. 11/655,390,entitled “APPARATUS
`
`Gi
`FOR GENERATING SPARGED, ELECTROCHEMI-
`CALLY ACTIVATED LIQUID;” USS. application Ser. No.
`
`11/655,310,
`entitled “METHOD OF GENERATING
`
`SPARGED, ELECTROCHEMICALLY ACTIVATED LIQ-
`UID;” U.S. application Ser. No. 11/655,385, entitled
`“METHOD AND APPARATUS FOR PRODUCING
`
`HUMANLY-PERCEPTABLE INDICATOR OF ELECTRO-
`
`CHEMICAL PROPERTIES OF AN OUTPUT CLEANING
`LIQUID:” and U.S. application Ser. No. 11/655,378, entitled
`“ELECTROCHEMICALLY ACTIVATED ANOLYTE AND
`CATHOLY'TE LIQUID.”
`
`
`
` El
`
`
`
`
`
`
`
`
`2
`buildings. They range in size from a small model, which is
`controlled by an operator walking behindit, to a large model,
`which is controlled by an operator riding on the machine.
`Such machines in general are wheeled vehicles with suitable
`operator controls. Their bodies contain power and drive cle-
`ments, a solution tank to hold.a cleaning liquid, anda recovery
`tank to hold soiled solution recovered from the floor being
`scrubbed. A scrub head, which contains one or more scrub-
`bing brushes and associated drive elements are attached to the
`vehicle and may be located in front of, under or behind it. A
`solution distribution system dispenses cleaning liquid from
`the solution tank to the floor in the vicinity of the scrubbing
`brushor brushes.
`Soft floor cleaning machines can be implemented as small
`mobile machines that are handled by an operator or can be
`implemented in a truck-mounted system having a cleaning
`wand connected to the truck. The truck carrics a cleaning
`liquid solution tank, a wastewater recovery tank and a pow-
`erful vacuum extractor.
`Typical cleaning liquids used in hard andsoft floor clean-
`ing systems include water and a chemically based detergent.
`The detergent typically includes a solvent, a builder, and a
`surfactant. While these detergents increase cleaning effec-
`tiveness for a variety of different soil types, such as dirt and
`No wa
`5 oils, these detergents also have a tendencyto leave unwanted
`residue on the cleaned surface. Such residue can adversely
`affect the appearance of the surface and the tendencyof the
`surface to re-soil and, depending on the detergent, can poten-
`tially cause adverse health or environment cffects. Similar
`disadvantages apply to cleaning systems for other types of
`surfaces and items.
`Improved cleaning systemsare desiredlor reducing the use
`of typical detergents and/or reducing the residue left on the
`surface after cleaning while maintaining desired cleaning
`and/or disinfecting properties.
`SUMMARY
`
`ran °
`
`49 2
`3
`
`40
`
`An embodimentofthe disclosure is directed to a method,
`whichincludes: a) receiving a liquid having a pH in a range
`between pH6-pH8 and an oxidation reduction potential
`(ORP) between +50 mV; b) converting the liquid into an
`anolyte liquid and a catholyte liquid, which have respective
`pls outside of the range between pI16-pI18 and have respec-
`tive ORPsoutside the range between +50 mV;c) applying the
`anolyte and catholyte liquidsto a surfacefor a residence time;
`and d) recovering at
`least a portion of the anolyte and
`catholyte liquids from the surfaceafter the residence time and
`placing the anolyte and catholyte liquids in a common recov-
`ery lank, wherein the anolyte and catholyte liquids substan-
`tially neutralize to a pH between pH6-pH8 and an ORP
`between +50 mVwithin one minute of the time at which the
`anolyte and catholyte liquids are converted in step b).
`Another embodiment
`is directed to a method, which
`includes: a) receiving a liquid having a pI] ina range between
`pH6-pH8 and an oxidation reduction potential
`(ORP)
`between +50 mV; b) converting the liquid into an anolyte
`liquid and a catholyte liquid having respective pHsoutside of
`the range between pH6-pH8 and having respective ORPs
`outside the range between +50 mV; and c) applying the
`anolyte and catholyte liquids to a surface, whereinthe anolyte
`and catholyte liquids are in a blendedstate on the surface and
`substantially neutralize to a pH between pH6-pH8 and an
`ORP between +50 mVwithin one minute ofthe time at which
`the anolyte and catholyte liquids are converted instep b).
`Another embodimentis directed to an apparatus. The appa-
`ratus includes: a source for receiving a liquid having a pI] in
`
`
`
`
`
` FIELD OF THE DISCLOSURE
`
`The present disclosurerelates lo cleaning and/or sanitizing
`systems, and more particularly but notlimited to systems that
`generale a working liquid having cleaning and/or sanitizing
`properties.
`BACKGROUNDOF THE DISCLOSURE
`
`A wide variety of systems are in use today for cleaning or
`disinfecting residential,
`industrial, commercial, hospital,
`food processing, and restaurantfacilities, such as surfaces and
`other substrates, and for cleaning or disinfecting various
`items, such as food products orother articles.
`Tor example, hard floor surface scrubbing machines are
`widelyused to clean the floors of industrial and commercial
`
`Page 23
`
`OWTEx. 2147
`Tennant Company v. OWT
`IPR2021-00625
`
`

`

`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 24 of 42
`
`CASE 0:20-cv-00358-ECT-HB Doc. 80-16 Filed 06/10/21 Page 24 of 42
`
`US 8,025,787 B2
`
`
`
`4
`FIG. 15 is a block diagram, which illustrates the cleaner
`shown in FIG. 5 in a mode adapted to clean hard floors,
`according to an embodimentofthe disclosure.
`[IG. 16 is a perspective view of a soft floor cleaner(e.g.
`carpet extractor), according to an embodimentofthe disclo-
`sure.
`
`FIG. 17 is a perspective view of an all-surface cleaner,
`according to an embodimentofthe disclosure.
`FIG. 18 is a diagram illustrating a truck-mounted system
`according to a further embodimentofthe disclosure.
`FIG. 19 is a simplified block diagram, whichillustrates a
`
`cleaner having an EA waterdistribution system with an odor-
`ous compound source according to a further embodiment of
`the disclosure.
`[IG. 20 is a simplified block diagram of a cleaning liquid
`generator that mounted to a platform according to another
`embodiment.
`FIG. 21 is a block diagram of a system, which includes an
`indicator representing an operating state ofa functional gen-
`erator.
`
`w
`
`5
`
`No wa
`
`40
`
`in a
`
`3
`a range between pH6-pH8and an oxidation reduction poten-
`tial (ORP) between +50 mV. An electrolyzer, which converts
`the received liquid to an anolyte liquid and a catholyte liquid,
`which have respective pHs outside of the range between
`pH6-pH8 and have respective ORPs outside the range
`between +50 mV. A flowpath from the electrolyzer is con-
`figured.to dispense the analyte and catholyte liquids from the
`apparatus. A recoverydevice recoversat least a portion of the
`anolyte and catholyte liquids from a surface after a residence
`time onthe surface andplacesthe liquids in a commonrecov-
`ery tank, wherein the anolyte and catholyte liquids substan-
`tially neutralize to a pH between pH6-pH8 and an ORP
`between +50 mVwithin one minute ofthat time at which the
`analyte and. catholyte liquids are converted by the clectro-
`lyzer.
`
`
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`
`
`FIG. 1 illustrates an example of a functional generator,
`which can be used to electrochemically activate a liquid to be
`treated for use in cleaning, such as water, onboard or off-
`board a hard and/orsoft floor cleaner according to an embodi-
`ment of the disclosure.
`FIG. 2 illustrates a functional generator according to
`another embodimentofthe disclosure.
`FIG. 3 illustrates an apparatus having a sparging device
`located downstre