Unified Patents v. Kerr Machine Co

This case involves Unified Patents, a member-based organization focused on deterring what it considers abusive patent assertions by non-practicing entities (NPEs) and improving patent quality by challenging questionable patents, and Kerr Machine Co, the patent owner. Unified Patents operates by identifying patents it believes are of low quality or likely to be asserted, and then initiating post-grant review (PGR) or inter partes review (IPR) proceedings at the Patent Trial and Appeal Board (PTAB) to invalidate them, rather than engaging in licensing or settlement payments. Kerr Machine Co, based in Sulphur, Oklahoma, is an operating company specializing in the manufacture of industrial pumps, particularly well service pumps used in demanding applications such as hydraulic fracturing, coiled tubing operations, and cementing processes in the oil and gas industry.

The central subject of this PGR is U.S. Patent 12,152,582 B2, owned by Kerr Machine Co. This patent relates to fluid ends designed for reciprocating pumps, specifically describing a fluid end that features sealed fluid flow bores without the need for a threaded retaining nut. The invention details how these fluid ends can be assembled using various kits, each comprising a fluid end body, a component, a retainer element, and a fastening system. While there isn't an "accused product" in the traditional sense of infringement litigation, the PTAB institution decision references that features of the challenged patent are present in "Patent Owner's Kerr Pump," indicating the patent pertains to technology that Kerr Machine Co practices in its pump manufacturing.

The procedural posture of this case is a Post-Grant Review (PGR2025-00031) before the Patent Trial and Appeal Board (PTAB) of the United States Patent and Trademark Office (USPTO). The case is currently "Pending - Instituted," with the PTAB having granted institution on July 10, 2025. The panel overseeing the review consists of Administrative Patent Judges Carl M. DeFranco, Brent M. Dougal, and Ryan H. Flax. The PTAB venue is significant because PGRs allow for comprehensive challenges to patent validity on nearly all grounds (including §§ 101, 102, 103, and 112, excluding best mode), offering a potentially faster and more cost-effective alternative to district court litigation. PGR petitions are "favored" in the PTAB's discretionary denial framework, particularly when filed early in a patent's life, as they are close in time to the initial examination and before patent rights become firmly settled.

This case is notable for several reasons. It highlights Unified Patents' continued strategy of proactively challenging patents they deem of low quality, even those held by operating companies, if they fall within monitored technology sectors where potential "unsubstantiated or invalid patent assertions" could arise. The technology at issue, fluid ends for reciprocating pumps, is crucial for the oil and gas industry, making the outcome potentially impactful for manufacturers and users of such specialized equipment. The institution of this PGR underscores the PTAB's willingness to review the validity of patents in key industrial sectors, reinforcing the role of post-grant proceedings in shaping the patent landscape.

The case, Unified Patents v. Kerr Machine Co, identified as PGR2025-00031, is a Post-Grant Review (PGR) proceeding before the Patent Trial and Appeal Board (PTAB) of the United States Patent and Trademark Office (USPTO), challenging the validity of US Patent 12,152,582. While the prompt states "Unified Patents" as the petitioner, the official PTAB records for PGR2025-00031 indicate that the petitioner is GD Energy Products, LLC. Kerr Machine Co. is the Patent Owner.

As a PTAB PGR, this proceeding is distinct from a district court patent infringement litigation. Therefore, many of the requested categories such as "complaint, answer, counterclaims," "Markman outcomes," "discovery milestones," "trial events, verdict, and post-trial motions" are not directly applicable in the same manner as they would be in a district court case. Instead, the developments below detail the progress of the PGR.

Key Legal Developments and Current Posture:

• PGR Petition Filing (2025-02-06): GD Energy Products, LLC filed a Petition for Post-Grant Review challenging the patentability of claims 1-15 (all claims) of U.S. Patent 12,152,582. The petition asserted grounds based on obviousness.
• Institution Decision (2025-07-10): The PTAB issued a decision granting institution of the Post-Grant Review. The Board determined that, based on the information presented in the petition, it was "more likely than not that at least one claim challenged in the petition is unpatentable."
• Patent Owner's Decision Not to Respond (2025-09-22): A conference call was held between counsel for the Patent Owner (Kerr Machine Co.), Petitioner (GD Energy Products, LLC), and the PTAB panel. During this call, Kerr Machine Co. confirmed its intention not to file a response to the Petition or the Institution Decision, nor any other anticipated papers or evidence in the proceeding. Kerr Machine Co. stated it was not expressly abandoning the proceeding but requested that the Board enter a final decision in due course. The Petitioner also requested a final decision.
• Current Status: The PGR is pending, awaiting a Final Written Decision. Given the Patent Owner's decision not to contest the petition, it is highly likely the PTAB will issue a Final Written Decision finding the challenged claims unpatentable. A Final Written Decision in a PGR proceeding is typically due within one year of the institution date, which would be around July 10, 2026, for this case, barring any extensions.

Parallel PTAB IPR/PGR Proceedings and District Court Litigation:

As of the current date, searches for "US patent 12152582 litigation" and related terms did not yield specific information about a parallel district court patent infringement litigation involving Kerr Machine Co. and US Patent 12,152,582 that PGR2025-00031 is directly affecting or staying. The PTAB proceeding itself is the primary legal development for this patent at this time.

The provided case metadata indicates "Unified Patents" as the plaintiff (petitioner in a PGR proceeding). However, publicly available PTAB docket entries for PGR2025-00031 consistently identify "GD Energy Products, LLC" as the Petitioner and "Kerr Machine Company" as the Patent Owner.

Based on the actual PTAB docket for PGR2025-00031, the counsel of record representing the Petitioner, GD Energy Products, LLC, are:

• Mark J. DeBoy
  • Role: Attorney for Petitioner (likely lead counsel)
  • Firm: Edell, Shapiro & Finnan, LLC
  • Office Location: Gaithersburg, MD
  • Relevant Experience: Mark J. DeBoy is a registered patent attorney (Reg. No. 66983) who has appeared in this PTAB proceeding on behalf of the Petitioner.
• Andrew Haberman
  • Role: Attorney for Petitioner
  • Firm: Edell, Shapiro & Finnan, LLC
  • Office Location: Gaithersburg, MD
  • Relevant Experience: Andrew Haberman is also listed as an attorney for the Petitioner in this PTAB proceeding.

Unified Patents is not listed as a party or the petitioner in the publicly available PTAB docket entries for PGR2025-00031. Therefore, counsel for Unified Patents has not appeared in this specific case based on the identified docket records.

The counsel of record representing Kerr Machine Co. in PGR2025-00031, Unified Patents v. Kerr Machine Co., are from the firm Tomlinson McKinstry, P.C., located in Oklahoma City, OK. While specific roles (e.g., lead counsel, back-up counsel) for this particular PTAB case are not explicitly detailed in publicly available snippets of the "Patent Owner's Power of Attorney", attorneys from this firm with relevant intellectual property and patent litigation experience include:

• Ross N. Chaffin
  • Role: Director (likely counsel of record)
  • Firm & Office: Tomlinson McKinstry, P.C., Oklahoma City, OK
  • Experience: Represents companies in patent infringement lawsuits and has successfully prosecuted hundreds of patent applications. He is licensed to practice before the United States Patent and Trademark Office and in the Tenth Circuit Court of Appeals.
• Gary S. Peterson
  • Role: Of Counsel (likely counsel of record)
  • Firm & Office: Tomlinson McKinstry, P.C., Oklahoma City, OK
  • Experience: Practices in Intellectual Property, Business & Complex Litigation.
• Robert D. Tomlinson
  • Role: Of Counsel (likely counsel of record)
  • Firm & Office: Tomlinson McKinstry, P.C., Oklahoma City, OK
  • Experience: An experienced trial attorney whose litigation practice includes patent, trademark, and copyright infringement, trade secret, and complex business litigation. He has completed more than 70 jury trials and is admitted to practice before the Federal Circuit Court of Appeals.