Viance, LLC vs. Koppers Performance Chemicals, Inc.

Explore the PTAB proceeding PGR2026-00023 filed by Viance, LLC on 2026-03-17. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

PGR2026-00023

Filing Date

2026-03-17

Accorded Filing Date

2026-03-17

Institution Decision Date

2026-08-19

Last Modified Date

2026-09-19

Proceeding Type

PGR

Termination Date

2026-08-19

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Viance, LLC

Represented By

Wimbiscus, Thomaset al

Patent Owner / Respondent

Koppers Performance Chemicals, Inc.

Represented By

Riddle, Robertet al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 1700 - Chemical & Materials Engineering

Patent Information

1 Patent Involved

Respondent Application Number 19072608

Respondent Patent Number 12370716

External Links

Espacenet

Google Patents

Respondent Inventor Min Kuang et al

Respondent Tech Center TC 1700 - Chemical & Materials Engineering

Address and Attorney/Agent Information

25 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name K&L GATES LLP-Pittsburgh

Customer Number 26285

Address 210 SIXTH AVENUE, PITTSBURGH, PA, 15222-2613, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
30048	George Dickos	412-355-6785
36360	Mark Leslie	412-355-6271
41919	William Kuss	412-355-6323
42747	Mark Knedeisen	412-355-6342
46320	Patrick Mcelhinny	412-355-6334
46599	Roberto Capriotti	412-355-6423
47893	Andrew Reibman	212-536-4074
54089	James Fajkowski	617-261-3100
58587	Andrew Hollander	973-848-4128
59104	Ragae Ghabrial	908-249-3365
61532	Sean Conrad	412-355-6218
62327	Nolan Hubbard	312-781-6017
64983	Paul Levin	412-355-6500
65578	Dennis Majewski	312-807-4329
67462	Lauren Murray	412-355-7471
73798	Robert Sovesky	412-355-6500
76212	William Fortunato	336-698-4285
77096	Eric Yurinko	412-355-6705
77190	Brian Bozzo	412-471-8815
77494	Garrett Tobin	412-355-8254
80927	Samantha Thompson	412-355-6258
81032	James Capone	412-577-7400
81285	Kara Shearer	724-757-6433
82391	Patrick Mcknight	412-355-3771
82749	Colin Phelan	412-355-6500

Proceeding Documents

145

Notice: NOTICE OF REFUND NOTICE

2026-08-28 FILING PARTY: BOARD

Download

Petitioner's Request for Refund OTHER

2026-08-25 FILING PARTY: PETITIONER

Download

Director Discretionary Decision: Deny RESPONSE

2026-08-19 FILING PARTY: BOARD

Download

Director Discretionary Decision: Deny RESPONSE

2026-08-17 FILING PARTY: BOARD

Download

Director Discretionary Decision: Deny RESPONSE

2026-08-06 FILING PARTY: BOARD

Download

Viance, LLC vs. Koppers Performance Chemicals, Inc.

Proceeding Overview

Parties & Counsel

Petitioner

Viance, LLC

Represented By

Patent Owner / Respondent

Koppers Performance Chemicals, Inc.

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Notice: NOTICE OF REFUND NOTICE

Petitioner's Request for Refund OTHER

Director Discretionary Decision: Deny RESPONSE

Director Discretionary Decision: Deny RESPONSE

Director Discretionary Decision: Deny RESPONSE

Patent Owner's Motion to Seal Sur-Reply in Support of its Preliminary Response MOTION

Patent Owner's Sur-Reply in Support of its Preliminary Response NOTICE

Petitioner's Sur-Reply Brief in Support of Opposition to Patent Owner's Request for Discretionary Denial NOTICE

Motion to Seal Patent Owner_s Reply In Support Of Its Request that Institution Be Denied on Discretionary Grounds MOTION

Patent Owner_s Reply Brief In Support Of Request that Institution Be Denied on Discretionary Grounds NOTICE

Performance and emissions of a diesel engine fueled by biodiesel-diesel blends with recycled expanded polystyrene and fuel stabilizing additive, Calder, Jorge et al (April 15, 2018) Exhibit

Petitioner's Reply to Patent Owner's Preliminary Response NOTICE

Petitioner's CORRECTED Opposition to Patent Owner's Request for Discretionary Denial of Institution (Public, Redacted) RESPONSE

Email Correspondence Exhibit

Patent Owner's Motion to Seal POPR and Declaration MOTION

Ex. 2016 Exhibit

Ex. 2017 Exhibit

Ex. 2014 Exhibit

Ex. 2019 Exhibit

Ex. 2021 Exhibit

Ex. 2015 Exhibit

Patent Owner's Preliminary Response POPR

Ex. 2012 Exhibit

Ex. 2020 Exhibit

Ex. 2013 Exhibit

Ex. 2018 Exhibit

Declaration of John Hussa Exhibit

Customer Toll Manufacturing Agreement Exhibit

Amended and Restated Limited Liability Company Agreement Exhibit

Petitioner's Motion to Seal MOTION

12/9/25 Letter from Koppers Performance Chemicals to Viance LLC Exhibit

Petitioner's Updated Mandatory Notices NOTICE

Subsidiary vs. Affiliate article Exhibit

Second Customer Toll Manufacturing Agreement Exhibit

Declaration of Jonathan Moyes Exhibit

Petitioner's Opposition to Patent Owners Request for Discretionary Denial of Institution (Public, Redacted) RESPONSE

Exhibit 2009 - Venator 2021 Annual Report Exhibit

Exhibit 2010 - Interim Processes Exhibit

(Redacted) Brief Requesting That Institution Be Denied on Discretionary Grounds OTHER

Ex. 2005 - Viance LEED-for-Building-Design-and-Construction re Venator Exhibit

Exhibit 2006 Ventator Materials PLC Exhibit

Ex. 2004 - Lanxess printout Exhibit

Ex. 2003 - Ventador 2023 Annual Report Exhibit

Exhibit 2007 - Venator 2021 Form 6-K Exhibit

Ex. 2002 - Venator 2020 10-K Exhibit

Motion to Seal MOTION

Exhibit 2008 - Letter from Koppers to Viance Exhibit

Exhibit 2011 - Final Written Decisions Exhibit

Exhibit 2001 - Viance Petition for Determination Identifying Non-Hazardous Secondary DCOI-Treated Wood as a Non-Waste Exhibit

ORDER Granting Petitioner’s Motion to Seal and for Entry of Protective Order 37 C.F.R. §§ 42.14, 42.54, 42.55 ORDER

Patent Owner’s Response to Petitioner’s Motion to Seal and Submission of Acknowledgment for Access to Protective Order Material OPPOSITION

Notice: Mandatory Notice NOTICE

Notice: Power of Attorney NOTICE

Notice: NOTICE OF FILING DATE ACCORDED TO PETITION AND TIME FOR FILING PATENT OWNER PRELIMINARY RESPONSE NOTICE

June 29, 2022 Bill of Lading Exhibit

US Application No. 19/072,608 Exhibit

Proposed Modified Protective Order Exhibit

May 20, 2022 Purchase order from Customer to Viance Exhibit

Sept. 28, 2020 UP-50 presentation Exhibit

Aug. 24, 2022 Invoice from shipping company to Viance Exhibit

July 6, 2022 Invoice from shipping company to Viance Exhibit

UP-23 Wood Preservative Product Label Exhibit

July 26, 2022 Customer Order Exhibit

Fuels and Lubricants Handbook Exhibit

Declaration of Barbara Aldinger Exhibit