Patent 9251531

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

Active provider: Google · gemini-2.5-pro

No PTAB proceedings on file. This patent has not been challenged through Inter Partes Review, Post-Grant Review, or Covered Business Method review at the USPTO. The absence is itself a signal — well-asserted patents eventually attract IPRs.

Cases on file (2)

Group view →

Specific litigation cases in our database that name US patent 9251531. The free-form analysis below may also discuss cases beyond this list.

  • Visa USA Inc v. Cortex MCP Incfiled Apr 23, 2026
    26-1733Court of Appeals for the Federal CircuitOpen

    Defendants: Cortex MCP Inc

    The accused product is a platform and file format used to store and verify digital credentials.

  • Cortex MCP, Inc. v. Visa, Inc.filed Jan 26, 2023
    6:23-cv-00048 (W.D. Tex.); 5:23-cv-05720 (N.D. Cal.)U.S. District Court for the Northern District of CaliforniaStayed

    Defendants: Visa, Inc.

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

✓ Generated

Litigation History of U.S. Patent 9,251,531

As of May 11, 2026, U.S. Patent 9,251,531 ('531 patent) has been subject to litigation in U.S. District Courts and validity challenges at the Patent Trial and Appeal Board (PTAB).

District Court Litigation

1. Cortex MCP, Inc. v. Visa, Inc.

  • Plaintiff: Cortex MCP, Inc.
  • Defendant: Visa, Inc.
  • Jurisdiction: Initially U.S. District Court for the Western District of Texas; transferred to U.S. District Court for the Northern District of California.
  • Case Numbers: 6:23-cv-00048 (W.D. Tex.); 5:23-cv-05720 (N.D. Cal.).
  • Filing Date: January 26, 2023 (in W.D. Tex.).
  • Status: The case was transferred to the Northern District of California on November 3, 2023. On July 22, 2024, the court granted Visa's motion to stay the case pending the resolution of inter partes review (IPR) proceedings at the PTAB. A subsequent order extended the stay on February 19, 2026. The case remains stayed pending appeals of the PTAB decisions.

Patent Trial and Appeal Board (PTAB) Proceedings

Visa, Inc. filed multiple inter partes review (IPR) petitions challenging the validity of the claims of the '531 patent.

1. IPR2024-00486

  • Petitioner: Visa Inc.
  • Patent Owner: Cortex MCP Inc.
  • Jurisdiction: USPTO Patent Trial and Appeal Board
  • Filing Date: January 25, 2024.
  • Outcome/Status: The PTAB instituted a review on August 2, 2024. In a Final Written Decision, the board found all challenged claims (1-20) unpatentable. The decision has been appealed to the U.S. Court of Appeals for the Federal Circuit (Case No. 26-1259).

2. IPR2024-00487

  • Petitioner: Visa Inc.
  • Patent Owner: Cortex MCP Inc.
  • Jurisdiction: USPTO Patent Trial and Appeal Board
  • Status: This case was consolidated with IPR2024-00486. The Final Written Decision finding the claims unpatentable applies to this proceeding as well.

Generated 5/11/2026, 1:58:18 AM