Liberty Energy Inc. et al. vs. U.S. WELL SERVICES, LLC et al.

Explore the PTAB proceeding IPR2025-01539 filed by Liberty Energy Inc. et al. on 2025-10-06. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2025-01539

Filing Date

2025-10-06

Accorded Filing Date

2025-10-06

Institution Decision Date

2026-01-27

Last Modified Date

2026-02-27

Proceeding Type

IPR

Termination Date

2026-01-27

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Liberty Energy Inc. et al.

Represented By

Walters, Chadet al

Patent Owner / Respondent

U.S. WELL SERVICES, LLC et al.

Represented By

FERGUSON, BRIANet al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 3600 - Transportation, E-Commerce & Construction

Patent Information

1 Patent Involved

Respondent Application Number 17321936

Respondent Patent Number 11668420

External Links

Espacenet

Google Patents

Respondent Inventor Jared Oehring et al

Respondent Tech Center TC 3600 - Transportation, E-Commerce & Construction

Address and Attorney/Agent Information

15 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name Abel Schillinger, LLP

Customer Number 13897

Address PO Box 80010, Austin, TX, 78708, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
35284	George Meyer	512-900-8500
36079	Jeffrey Abel	512-900-8500
44532	Bernadette Bennett	512-900-8500
46767	Angel Herrera Jr	512-900-8500
50417	Heribert Muensterer	512-900-8507
57634	Katrin Venter	571-214-8271
58342	Ethan Schillinger	512-900-8500
63835	Taffie Jones	336-741-2932
66027	David Pittman	312-580-9696
66575	Brett Hamilton	512-900-8520
68730	Lei Guo	512-900-8500
69778	Max Kolar	512-900-8500
75702	Jaclyn Torres	512-900-8535
76319	Alex Jacobs	847-797-1354
82214	Maria Amon	512-900-8518

Proceeding Documents

Director Discretionary Decision: Deny RESPONSE

2026-01-27 FILING PARTY: BOARD

Download

1069

EX1069 - About Dixon webpage Exhibit

2026-01-09 FILING PARTY: PETITIONER

Download

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

2026-01-09 FILING PARTY: PETITIONER

Download

1071

EX1071 - Is Gardner Denver Still In Business - Tooling Ideas Webpage Exhibit

2026-01-09 FILING PARTY: PETITIONER

Download

1068

EX1068 - Patent Owner Third Amended Complaint - SDTX-4-24-cv-00839 Exhibit

2026-01-09 FILING PARTY: PETITIONER

Download

Liberty Energy Inc. et al. vs. U.S. WELL SERVICES, LLC et al.

Proceeding Overview

Parties & Counsel

Petitioner

Liberty Energy Inc. et al.

Represented By

Patent Owner / Respondent

U.S. WELL SERVICES, LLC et al.

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Director Discretionary Decision: Deny RESPONSE

EX1069 - About Dixon webpage Exhibit

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

EX1071 - Is Gardner Denver Still In Business - Tooling Ideas Webpage Exhibit

EX1068 - Patent Owner Third Amended Complaint - SDTX-4-24-cv-00839 Exhibit

EX1065 - Patent Owner Original Complaint - SDTX-4-24-cv-00839 Exhibit

EX1070 - About Gardner Denver webpage Exhibit

EX1067 - Patent Owner Second Amended Complaint - SDTX-4-24-cv-00839 Exhibit

EX1063 - Analysis of the $69.6 Bn Hydraulic Fracturing Industry 2025-2030 Exhibit

EX1066 - Patent Owner First Amended Complaint - SDTX-4-24-cv-00839 Exhibit

EX1061 - U.S. Patent No. 10,964,927 Exhibit

EX1064 - Patent Owner Complaint - EDTX-2-25-cv-00522 Exhibit

EX1062 - USWS PTAB History Exhibit

PATENT OWNER’S PRELIMINARY RESPONSE POPR

Patent Owner U.S. Notice Of Intent To Designate Richard H. Quarles As A Provisionally Recognized PTAB Attorney Eligible For Automatic PHV Admission As Back Up Counsel NOTICE

Ex. 2002 - Civil Action No. 2:24-cv-00884-JRG-RSP – Defendants’ Amended Answer and Counterclaims Exhibit

Ex. 2009 - Case No. 2:25-cv-00522-JRG-RSP – Joint (Agreed) Motion for Entry of Docket Control Number Exhibit

Ex. 2005 - Case No. 2:25-cv-00522-JRG-RSP – Liberty’s Invalidity Contentions Exhibit

Ex. 2006 - Federal Court Management Statistics-Profiles Exhibit

Ex. 2008 - Case No. 4:24-CV-00839-KPE – Liberty Motion to Stay Exhibit

Ex. 2001 - Declaration of Richard H. Quarles ISO PHV Admission Exhibit

Ex. 2003 - Case No. 2:24-cv-00884-JRG-RSP – Order to Sever Counterclaims Exhibit

Ex. 2007 - USPTO Rescission of Memorandum Addressing Discretionary Denial Procedures Exhibit

Ex. 2004 - Case No. 2:25-cv-00522-JRG-RSP – Scheduling Order Exhibit

Patent Owner’s Discretionary Denial Brief RESPONSE

Petitioners' Updated Exhibit List NOTICE

EX1060 - IPR2025-01539 November 19, 2025 Stipulation Exhibit

Patent Owner's Power of Attorney NOTICE

Patent Owner's Mandatory Notice NOTICE

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

EX1009 - Part 2 - ADPL718 Catalog Exhibit

EX1032 - Power Generation Products Exhibit

EX1013 - Declaration of Holly Langenfelder Exhibit

EX1035 - A brochure of Solar Turbines Turbomachinery Systems for Oil Gas Exhibit

EX1024 - Mutalik-Case History of Sequential and Simultaneous Fracturing Exhibit

EX1015 - Morton Unlocking the Earth A Short History of Hydraulic Fracturing Exhibit

EX1034 - Eugene - Marks Standard Handbook for Mechanical Engineers Exhibit

EX1021 - US11959371 Oehring Exhibit

EX1006 - US20120255734A1 Coli Exhibit

EX1057 - Tutterow-2004-Variable speed pumping Exhibit

EX1008 - US9127545 Kajaria Exhibit

EX1056 - 11009162 File history part 1 Exhibit

EX1045 - Socket Weld Fittings Types and Applications – Completely Specs Exhibit

EX1009 - Part 3 - ADPL718 Catalog Exhibit

EX1041 - Amazon.com Dixon Frac Fitting (HUF100300CS) Exhibit

EX1059 - Claim Listing for 420 Patent Exhibit

EX1007 - Liu Pipeline Engineering Exhibit

EX1020 - U.S. Publication No. 20130306322A1 Sanborn Exhibit

EX1004 - US11549348 Cici Exhibit

EX1014 - Declaration of Dr. Sylvia Hall-Ellis, Ph.D. Exhibit

EX1031 - GTS Admiral W.M. Callaghan Exhibit

EX1016 - Shooters - A Fracking History - American Oil & Gas Historical Exhibit

Petitioners' Power of Attorney NOTICE

EX1043 - Dixon History-First Commercial Hydraulic Fracturing -frac fittings Exhibit

EX1023 - Pearson-Results of Stress-Oriented and Aligned Perforating Exhibit

EX1036 - Solar Turbines Oil Gas Industry Packages Generator Sets Titan 130 Exhibit

EX1040 - Dixon Product Literature website Exhibit

EX1042 - Dixon History Dixon (100 years) Exhibit

EX1056 - 11009162 File history part 4 Exhibit

EX1018 - Bourgoyne Exhibit

EX1030 - ASME Landmark- America’s First Power Generating Gas Turbine Exhibit

EX1009 - Part 4 - ADPL718 Catalog Exhibit

EX1029 - Rassenfoss-A Look Into What Fractures Really Looks Like Exhibit

EX1054 - Reciprocating Pump Standard Exhibit

EX1055 - Hydraulic Fracturing Institute Reciprocating Pump Standards Exhibit