Charles River Laboratories, Inc. Post grant review

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Case Number:

PGR2025-00023

Case Type:

PGR

Status:

Final Written Decision

Petitioner:

Charles River Laboratories, Inc.

Patent Number:

11,959,109

  1. September 09, 2026

    Split PTAB Invalidates Japanese Co.'s Patent Claims

    A divided Patent Trial and Appeal Board has thrown out claims in a pair of Seikagaku Corp. patents related to endotoxin detection that were challenged by Charles River Laboratories, finding they were either obvious or anticipated.

  2. September 12, 2025

    Stewart Issues New Slate Of Discretionary Denials

    Acting U.S. Patent and Trademark Office Director Coke Morgan Stewart rejected 18 petitions for Patent Trial and Appeal Board review based on discretionary factors on Friday, but didn't introduce new elements to her analysis.

  3. July 11, 2025

    Catching Up On Stewart's Discretionary Denial Decisions

    Acting U.S. Patent and Trademark Office Director Coke Morgan Stewart and a top administrative patent judge issued 15 discretionary denial decisions on Patent Trial and Appeal Board petitions over the past week, across nearly 40 cases. Here's what they decided.