Patent 9730443

Litigation summary

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

Active provider: Google · gemini-2.5-pro

PTAB activity (1)

AIA trial proceedings — IPR, PGR, CBM — filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced directly from the PTAB Trial API.

  • IPR2025-01459IPRfiled Aug 27, 2025vs. Clean Chemistry, Inc. et al.Discretionary Denial

Cached for 24 hours. Status strings are sourced verbatim from the PTAB API; the colored badge is our heuristic classification.

Cases on file (2)

Group view →

Specific litigation cases in our database that name US patent 9730443. The free-form analysis below may also discuss cases beyond this list.

Litigation summary

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

✓ Generated

Litigation Involving US Patent 9,730,443

As of April 26, 2026, US patent 9,730,443 is the subject of at least one district court lawsuit and related proceedings before the Patent Trial and Appeal Board (PTAB). The patent owner, Enviro Tech Chemical Services, Inc., is actively asserting the patent.

District Court Litigation

1. Enviro Tech Chemical Services, Inc. v. Clean Chemistry, Inc.

  • Plaintiff(s): Enviro Tech Chemical Services, Inc.
  • Defendant(s): Clean Chemistry, Inc.
  • Jurisdiction: U.S. District Court for the Western District of Texas
  • Case Number: 1:24-cv-01313
  • Filing Date: October 29, 2024
  • Outcome or Current Status: The case is currently open and active. On October 15, 2025, Judge Alan D. Albright denied the defendant's motion to dismiss for failure to state a claim. A Markman hearing has been held, and the case is proceeding. This lawsuit also involves infringement allegations concerning related U.S. Patent Nos. 8,546,449, 9,363,997, and 9,737,072.

Patent Trial and Appeal Board (PTAB) Proceedings

In response to the district court litigation, the defendant initiated proceedings to challenge the validity of the patent.

1. Clean Chemistry, Inc. v. Enviro Tech Chemical Services, Inc.

  • Petitioner: Clean Chemistry, Inc.
  • Patent Owner: Enviro Tech Chemical Services, Inc.
  • Jurisdiction: U.S. Patent and Trademark Office, Patent Trial and Appeal Board
  • Case Number: IPR2025-01459
  • Filing Date: Documents related to this proceeding were filed on August 26, 2025.
  • Outcome or Current Status: The status of this Inter Partes Review (IPR) has been noted as "Discretionary Denial". This indicates the PTAB declined to institute a trial on the patent's validity. This IPR is directly related to the ongoing district court case.

Generated 5/14/2026, 12:49:00 AM