Patent 8546449

Litigation summary

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

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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.

  • IPR2025-01472IPRfiled Sep 8, 2025vs. Clean Chemistry, Inc.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)

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Specific litigation cases in our database that name US patent 8546449. 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

Known litigation involving US patent 8546449 includes:

  1. PTAB Case IPR2025-01472

    • Plaintiff(s): Unified Patents Inc.
    • Defendant(s): Enviro Tech Chemical Services Inc
    • Jurisdiction: Patent Trial and Appeal Board (PTAB)
    • Case Number: IPR2025-01472
    • Filing Date: September 3, 2024
    • Outcome/Current Status: Not Instituted - Procedural.

  2. US Case filed in Texas Western District Court

    • Plaintiff(s): Enviro Tech Chemical Services, Inc.
    • Defendant(s): Spartan Chemical Company, Inc.
    • Jurisdiction: Texas Western District Court
    • Case Number: 1:24-cv-01313
    • Filing Date: November 20, 2024
    • Outcome/Current Status: Active; the most recent event listed is an "Answer" filed on March 24, 2025.

While Google Patents indicates "First worldwide family litigation filed" with a link to Darts-ip, specific details for this case beyond what is already listed for the US cases are not publicly available without a Darts-ip login.

Generated 5/23/2026, 6:47:47 PM