Clean Chemistry, Inc. vs. Enviro Tech Chemical Services, Inc. et al.

Explore the PTAB proceeding IPR2025-01471 filed by Clean Chemistry, Inc. on 2025-09-02. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2025-01471

Filing Date

2025-09-02

Accorded Filing Date

2025-09-02

Institution Decision Date

2026-02-18

Last Modified Date

2026-03-24

Proceeding Type

IPR

Termination Date

2026-02-18

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Clean Chemistry, Inc.

Represented By

Knauss, Danielet al

Patent Owner / Respondent

Enviro Tech Chemical Services, Inc. et al.

Represented By

HALSEY, ANNAet al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 1600 - Biotechnology & Organic Chemistry

Patent Information

1 Patent Involved

Respondent Application Number 14681938

Respondent Patent Number 9363997

External Links

Espacenet

Google Patents

Respondent Inventor Michael S. Harvey et al

Respondent Tech Center TC 1600 - Biotechnology & Organic Chemistry

Address and Attorney/Agent Information

81 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name DORITY & MANNING, P.A.

Customer Number 22827

Address POST OFFICE BOX 1449, GREENVILLE, SC, 29602-1449, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
29609	James Bagarazzi	864-271-1592
31226	Richard Moose	864-271-1592
35070	Stephen Bondura	864-271-1592
37647	Eric Jensen	864-271-592
38024	Timothy Cassidy	864-271-1592
43486	James Baudino	864-271-1592
45675	Jason Johnston	864-271-1592
47178	Tim Williams	864-271-1592
52312	Jennifer Ulsh	864-271-1592
54599	Neil Batavia	800-815-6705
54768	David Cromer	864-271-1592
55462	Steven Moore	864-271-1592
56405	Alan Marshall	864-271-1592
60114	Robert Williams	864-271-1592
60382	J Workman	864-271-1592
60619	Scott Cole	864-271-1592
61527	Jeremy Stroh	800-815-6705
62037	Michael Gagliano	864-271-1592
62286	Seth Jones	864-271-1592
62943	James Burns Iii	864-271-1592
63096	Thomas Huycke	864-271-1592
63559	Justen Fauth	864-271-1592
64391	Jason Jennings	864-271-1592
65453	Joseph Probst	864-271-1592
67106	Maegen Stokes	804-271-1592
67161	John White Jr.	864-271-1592
67429	Jeffrey Patterson	206-910-6234
67591	Wesley Greenwell	864-271-1592
67645	Erik Sivertson	864-271-1592
68765	John Hailey Iii	864-271-1592
69584	Bethany Whelan	864-271-1592
69682	Yama Nezam	864-271-1592
70705	Anand Patel	864-271-1592
70858	Matthew Deiulio	864-271-1592
70875	Jordan Cox	702-469-0472
71280	Michael Templeton	330-697-3492
71471	Heidi Hood	864-271-1592
71674	Helen Zhang	864-271-1592
72539	Peter Keros	864-271-1592
73051	Laura Kohli	864-527-1560
74000	Matthew Sutch	864-271-1592
74033	Yusuf Hasan	864-271-1592
74719	Nathan Smith	864-271-1592
75960	Aaron Stonehocker	650-440-6537
76141	Jason Pittman	864-271-1592
76499	Kristen Tuiletufuga	864-271-1592
77420	James Noel	864-271-1592
77453	Michael Walters	256-653-8197
77671	Kathrynn Lyddane	864-271-1592
78027	Nicholas Mcdonald	864-527-1573
78219	Spenser Schwabe	864-271-1592
78427	Lucas Jensen	864-271-1592
78850	Samuel Newberry	309-333-3531
79225	Nicholas Desetto	864-271-1592
79625	Liam Christ	864-271-1592
79738	William Waite	864-271-1592
79852	David Griffith Iii	864-271-1592
79977	Lillian Fant	864-616-5721
80106	Derion Reid	864-271-1592
80226	Logan Riley	864-271-1592
80246	Seth Mancuso	724-831-8028
80301	Peyton Guest	864-271-1592
81180	Justin Brown	864-527-1536
81194	Samuel Beckworth	864-271-1592
81234	Jonathan Gundana	864-271-1592
81264	Evan Martin	864-271-1592
81355	Samuel Sturman	864-271-1592
81846	Warren Conway Esq.	864-271-1592
82125	Caroline Smith	304-541-6594
82333	Bryson Glenn	800-815-6705
82478	William Macilwinen	864-271-1592
82527	Stuart Taylor	864-271-1592
82592	Shelby Maier	864-271-1592
82618	Dominic Knisely	864-271-1592
82661	Andrea Idler	864-271-1592
82715	Clara Hanger	864-271-1592
82741	Gillian Cox	512-994-6655
82961	Tanner Long	252-886-0447
83095	Jaden Stutts	864-271-1592
83147	Sean Quinn	864-271-1592
L0946	Lawrence Nwaesei	864-721-1592

Proceeding Documents

Notice: refund approved NOTICE

2026-03-24 FILING PARTY: BOARD

Download

Petitioner's Request for Refund of Post-Institution Fees OTHER

2026-03-23 FILING PARTY: PETITIONER

Download

Director Discretionary Decision: Deny RESPONSE

2026-02-18 FILING PARTY: BOARD

Download

ORDER Granting Patent Owner’s Motion for Admission Pro Hac Vice of Jennifer R. Sandlin 37 C.F.R. § 42.10 ORDER

2025-12-31 FILING PARTY: BOARD

Download

Director Discretionary Decision: Refer RESPONSE

2025-12-18 FILING PARTY: BOARD

Download

Clean Chemistry, Inc. vs. Enviro Tech Chemical Services, Inc. et al.

Proceeding Overview

Parties & Counsel

Petitioner

Clean Chemistry, Inc.

Represented By

Patent Owner / Respondent

Enviro Tech Chemical Services, Inc. et al.

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Notice: refund approved NOTICE

Petitioner's Request for Refund of Post-Institution Fees OTHER

Director Discretionary Decision: Deny RESPONSE

ORDER Granting Patent Owner’s Motion for Admission Pro Hac Vice of Jennifer R. Sandlin 37 C.F.R. § 42.10 ORDER

Director Discretionary Decision: Refer RESPONSE

Exhibit 2021 - Claim Construction Order Exhibit

Exhibit 2019 - '449 NOA Exhibit

Patent Owner's Preliminary Response POPR

Western District of Texas Median Time to Trial Report Exhibit

Exhibit 2018 - '449 Office Action Exhibit

Judge Albright Trial Docket Exhibit

U.S. Patent No. 7,919,122 Exhibit

EP2842423 Application Prosecution History Exhibit

Envirotech Chemical Services, Inc.’s Initial Infringement Contentions, dated March 4, 2025 Exhibit

Judge Albright’s Average Time to Trial Report Exhibit

U.S. Patent No. 8,546,449 File History Exhibit

Written Opinion for PCT Application No. PCT/US2011/000539 Exhibit

Food Safety, World Health Organization (Oct. 4, 2024) Exhibit

Claim Construction Order, Envirotech Chemical Services, Inc. v. Clean Chemistry, Inc., No. 1:24cv-01313 (W.D. Tex. Nov. 12, 2025), Dkt. 47 Exhibit

Environmental Assessment for Food Contact Notification FCN 23352 (Feb. 1, 2024) Exhibit

Exhibit 2020 - Whiteker Declaration Exhibit

Exhibit 2022 - Opening Claim Construction Brief Exhibit

Exhibit 2023 - Klibanov DCT Declaration Exhibit

Petitioner's Opposition to Patent Owner's Discretionary Denial Brief RESPONSE

Exhibit 2024 - Whiteker Declaration - Motivation to Combine Exhibit

PCT Application No. PCT/US2011/000539 Exhibit

EP2842423 Application Exhibit

Chapter 7: Peracetic Acid Acute Exposure Guideline Levels in Acute Exposure Guideline Levels for Selected Airborne Chemicals (2010) Exhibit

Exhibit 2017 - PHV Declaration of Jennifer Sandlin Exhibit

Motion for PHV Admission of Jennifer Sandlin MOTION

Notice: Power of Attorney NOTICE

Notice: Updated Mandatory Notice NOTICE

March 24 PTAB Memo Exhibit

Wiseman LinkedIn Exhibit

Scheduling Order Exhibit

FAQs for Interim Processes Exhibit

Clean Chemistry Google Patent Search Exhibit

Donabed Declaration Exhibit

Docket Navigator Stay Pending IPR Exhibit

Interim Director Discretionary Processes Exhibit

WO2024238884 Exhibit

Complaint with Exhibits Exhibit

Discretionary Denial Brief RESPONSE

Preliminary Invalidity Contentions Exhibit

Docket Navigator Time to Trial Exhibit

Bankosky LinkedIn Exhibit

March 26 PTAB Memo Exhibit

WO2024108086 Exhibit

E-mail regarding provisionally recognized attorney Exhibit

PHV Declaration of Ann Fort Exhibit

Notice of Intent to Designate Ann Fort as Back-Up Counsel NOTICE

Corrected Certificate of Service - Power of Attorney OTHER

Corrected Certificate of Service - Mandatory Notices OTHER

Notice: Power of Attorney NOTICE

Notice: Mandatory Notice NOTICE

Notice filing date accorded to Petition NOTICE

Hill, Chemical Engineering Kinetics & Reactor Design (1977) ("Hill") Exhibit

JP 2006-045147 A ("Okano") (Translated) Exhibit

U.S. Patent No. 9,363,997 Exhibit

Patent Owner's Executed Summons, Enviro Tech v. Clean Chem Exhibit

Notice: Power of Attorney NOTICE

US Patent App Publ No US 2009/0175956 to Buschmann et al ("Buschmann '956") Exhibit

Prosecution History of U.S. Patent No. 9,363,997 Exhibit

WO 2001/046519 ("Withenshaw") Exhibit

U.S. Patent No. 7,271,137 ("Tucker") Exhibit