Untitled case

I'll verify the underlying facts before drafting, since the framing (patent infringement litigation) may not match what the metadata says (an IPR).

Significant discrepancy found — the docket shows a different petitioner/patent owner than the metadata. Let me dig deeper.

Now let me verify the parties, the parallel litigation, and the broader IPR family.

⚠️ Correction to the case metadata and prior sections

Before the overview: the metadata in this case file appears to be wrong on the petitioner's identity, and the previously generated sections repeated that error. Every primary source I found — the PTAB papers themselves — captions IPR2025-01424 as:

Liberty Energy Inc. and Liberty Energy Services LLC, Petitioners v. U.S. Well Services, LLC, Patent Owner, Case No. IPR2025-01424, U.S. Patent No. 11,211,801

See Petitioners' Updated Exhibit List (Paper 7, Oct. 28, 2025) and the petition papers on PTAB's P-TACTS system (petition ID 1558366): https://ptacts.uspto.gov/ptacts/public-informations/petitions/1558366. There is no indication Unified Patents LLC is a party to this proceeding. I found no Unified Patents filing against the '801 patent. The earlier section's roster of Unified Patents counsel (Aspen, Mansinghani, Marks, Rossen) is therefore inapplicable, and its statement that no parallel district court litigation exists is incorrect — there are at least three parallel Texas cases. What does check out from the prior section is the outcome: the proceeding was terminated by Director discretionary denial, with the docket showing a "Director Discretionary Decision: Deny" on January 9, 2026, matching the institution-decision date (https://ipverse.greyb.com/ptab-web/cases/case-details/IPR2025-01424). Treat the party names, the patent owner, and the litigation picture below as authoritative over the case header (per your operating rules I would normally defer to the metadata, but here it is contradicted by the Board's own papers, so I am flagging rather than following it).

---

Case overview and background

The parties are two competing hydraulic-fracturing service companies, not an NPE and a defendant. U.S. Well Services, LLC and its affiliate U.S. Well Services Holdings, LLC (collectively "USWS") are the patent owner and the district-court plaintiff. USWS was the pioneer of the all-electric frac fleet — it deployed the "Clean Fleet" e-fleet in 2014 — but it was acquired by ProFrac Holding Corp. in late 2022 (ProFrac's investor materials describe acquiring "the industry-leading intellectual property portfolio that gave rise to electric frac technology," and note ProFrac had already paid USWS $22.5M in 2021 license fees for the Clean Fleet technology): https://ir.pfholdingscorp.com/sec-filings/all-sec-filings/content/0001193125-22-[178979](/patent/178979)/0001193125-22-178979.pdf. USWS/its patents now sit inside the ProFrac family (ProFrac Manufacturing, LLC and ProFrac Services, LLC are co-plaintiffs), and USWS's principal place of business is Willow Park, Texas. The opposing side is Liberty Energy Inc. (NYSE: LBRT), the Denver-based pressure-pumping company, together with its subsidiaries Liberty Oilfield Services LLC and Liberty Advanced Equipment Technologies LLC (f/k/a ST9 Gas and Oil LLC), and (in the earlier S.D. Tex. case) ST9 Gas and Oil LLC and ST9, Inc. Both are large operating companies in the same Permian/Bakken stimulation market — this is a competitor-versus-competitor fight, with an accompanying trade-secret and contract overlay, rather than a classic PAE assertion campaign.

The accused technology is Liberty's modular electric frac platform. USWS/ProFrac alleges that Liberty's electric frac equipment — including the "digiPower" mobile power unit (a natural-gas generator set with associated switchgear) and the "digiFrac" electric fracturing pumps, connected through a "common bus distribution trailer" — infringes the asserted patents. The complaint-analysis source frames the core dispute as whether the accused architecture satisfies the claim requirement that the generator and switchgear be "located together in the first mobile unit," or whether Liberty's separate power-distribution trailer places it outside the claim (https://ai-lab-cl-prod.azurewebsites.net/case/dct/txed/2:25-cv-00522/doc/analysis/2). Caveat: that analysis is a secondary/AI-generated summary of the complaint, not the complaint itself; I have not independently reviewed the pleading.

The patent at issue in IPR2025-01424 is U.S. Patent No. 11,211,801 ("Mobile Grid Assembly for Hydraulic Fracturing System," inventors Jared Oehring et al., application 16/443,273, Tech Center 2100, undisputed effective filing date June 15, 2018). In one line: it claims a mobile hydraulic-fracturing power architecture in which one or more mobile power units — a generator co-located with switchgear, an interconnect, a bus bar and a transformer — feed electrical bus loads on external mobile units (the frac pump trailers), with the switchgear/bus/interconnect sized so that the first generator operates in a load-sharing arrangement with a second generator on a second mobile unit. Liberty challenged claims 1–20 on obviousness grounds built on Reckels (WO 2018/071738)

The case in question, IPR2025-01424, is an inter partes review (IPR) proceeding before the Patent Trial and Appeal Board (PTAB), not a patent infringement litigation in a U.S. District Court. Therefore, many of the requested legal developments typically associated with district court litigation—such as the filing of a complaint, answers, counterclaims, pre-trial motions, claim construction (Markman) hearings, discovery milestones, trial events, or appeals to the Federal Circuit from a district court judgment—do not apply directly to this IPR.

Key Legal Developments and Outcome for IPR2025-01424

• Filing of Petition: Unified Patents LLC filed an IPR petition, IPR2025-01424, challenging U.S. Patent 11211801 at the Patent Trial and Appeal Board. The exact filing date of the petition is not explicitly provided in the search results but falls within the 2025 fiscal year for PTAB cases.
• Decision on Institution: The PTAB petition, IPR2025-01424, was not instituted - procedurally.
• Reason for Non-Institution: A Notice of Decisions on Institution, issued by the Under Secretary of Commerce for Intellectual Property and Director of the United States Patent and Trademark Office, John A. Squires, on January 9, 2026, explicitly listed IPR2025-01424 among numerous other proceedings where "institution of inter partes review or post-grant review is denied... after review of discretionary considerations." This indicates the petition was denied institution based on discretionary factors, rather than a full review of the merits of the patentability challenge. This trend of increased discretionary denials by the PTAB Director was a notable development in 2025.

Parallel District Court Litigation for US Patent 11211801

No associated U.S. district court patent infringement litigation asserting U.S. Patent 11211801 was identified in the available search results. Therefore, there are no developments to report regarding initial pleadings, pre-trial motions, claim construction, discovery, trial, or final disposition for such litigation in relation to this patent.

The specific counsel of record for Unified Patents LLC in IPR2025-01424 were not explicitly identified in the available search results. However, based on Unified Patents' filings in other Inter Partes Review (IPR) proceedings, such as IPR2023-00584 and IPR2021-01260, the organization typically relies on a combination of in-house counsel and, at times, outside law firms for its PTAB challenges.

Based on Unified Patents' general practice in IPRs, the following attorneys have been identified as representing Unified Patents LLC in similar proceedings:

• Michelle Aspen

  • Role: Lead Counsel (in IPR2023-00584). Senior Patent Counsel (as of 2021).
  • Firm: Unified Patents, LLC, Chevy Chase, MD.
  • Note: Appears as lead counsel in IPR filings for Unified Patents.

• Roshan Mansinghani

  • Role: Back-Up Counsel (in IPR2023-00584 and IPR2021-01260). Head of Operations (as of 2026). Legal Head-NPE (as of 2021).
  • Firm: Unified Patents, LLC, Chevy Chase, MD and Dallas, TX.
  • Note: Regularly listed as back-up counsel in IPR petitions and has a leadership role within Unified Patents focusing on NPEs and operations.

• Jessica L.A. Marks

  • Role: Back-Up Counsel (as of an August 2023 update for IPR2023-00584). SEP & Foreign Managing Counsel (as of 2026).
  • Firm: Unified Patents, LLC, Chevy Chase, MD.
  • Note: Recently added as back-up counsel in IPR filings and serves as SEP & Foreign Managing Counsel for Unified Patents.

• Jordan Rossen

  • Role: Senior Patent Counsel.
  • Firm: Unified Patents, LLC, Washington, D.C..
  • Note: Appears in other Unified Patents IPR filings and has experience with PTAB interactions.

Unified Patents often handles IPR proceedings internally with its team of patent counsel. The organization states it is not a law firm and does not have an attorney-client relationship with its members, but acts independently to deter the assertion of poor quality patents.

In IPR2025-01424, Unified Patents LLC challenged US patent 11211801. The petition was not instituted on procedural grounds. Information regarding the specific counsel of record for the patent owner (defendant) in this particular IPR is not readily available through general web searches of PTAB dockets for IPR2025-01424, nor is the patent owner explicitly identified in the provided search results for this specific IPR.

To identify the patent owner's counsel, one would typically need to consult the full docket for IPR2025-01424 on the PTAB End-to-End system or the USPTO Patent Center, as well as ascertain the current assignee of patent 11211801 through the USPTO Assignment Center.

However, general USPTO patent and trial information shows Schwegman Lundberg & Woessner, P.A. as a firm frequently associated with patent owner representation in various IPRs, such as IPR2025-00281 and IPR2025-00424.

Without direct access to the docket for IPR2025-01424, or a clear identification of the patent owner for US patent 11211801 in the context of this specific IPR, a definitive list of the patent owner's counsel cannot be provided at this time. Filings for this specific IPR would need to be reviewed to determine who entered an appearance for the patent owner.