In a July 29, 2026 final written decision, the Patent Trial and Appeal Board held that the petitioner failed to prove any challenged claim unpatentable in IPR2025-00574. The judgment, issued under 35 U.S.C. § 318(a), is a complete defense win for the patent owner: none of the instituted challenges succeeded.

At a high level, that means the Board was not persuaded that the prior art and supporting expert testimony carried the petitioner’s burden by a preponderance of the evidence.

The Patent Trial and Appeal Board’s Final Written Decision in IPR2025-00230 is a useful reminder of how decisively the Board will resolve validity disputes when the petitioner’s prior-art combinations, expert support, and claim construction positions align cleanly with the intrinsic record. In this June 11, 2026 decision, the PTAB concluded the inter partes review on the merits and determined the patentability of the challenged claims under the instituted grounds.

Although each final written decision turns on the particular technology and references at issue, the structure of the Board’s analysis here follows a familiar and important pattern for practitioners.

The Patent Trial and Appeal Board granted institution in IPR2026-00146, concluding that the petitioner met the threshold showing required under 35 U.S.C. § 314(a): a reasonable likelihood of prevailing on at least one challenged claim. At the institution stage, that is the key question, and the Board found the petition sufficiently supported to move forward to a full trial on patentability.

Although an institution decision is not a final merits ruling, it is often a significant signal.