Back to Blog
Director Institution Decision – Merits DenialMay 18, 2026·IPR2025-00278

Berkshire Hathaway Energy Company et al. v. MES, Inc.

Patent Trial and Appeal Board

Holding

The Board denied institution of IPR2025-00278 against U.S. Patent No. 10,343,114 B2 (a chemical/environmental technology patent) not on the merits of the prior art grounds, but as a matter of docket management: because the Board simultaneously instituted review in the companion proceeding IPR2025-00274 on the same patent, and the Director had instructed that 'at most one IPR' challenging the '114 patent be maintained, the Board honored Petitioner's own request to prioritize IPR2025-00274 and denied institution here. The denial was thus procedural and administrative rather than a substantive determination that the petition lacked merit.

Why It Matters

When a petitioner files multiple petitions against the same patent and the Director issues a 'maintain at most one IPR' instruction following Director Review, the Board will collapse the proceedings and deny the lower-priority petition even if it was previously instituted — making the petitioner's own prioritization request in its multi-petition explanation a binding strategic choice with real consequences.

§ 314(a)parallel litigationclaim construction§ 325(d)

How this summary was made: Drafted with AI from the Board's or the Director's decision. Read the document itself before relying on the summary. Editorial policy

More on this topic

New to District court litigation? Start with PTAB vs. District Court: Where to Challenge a Patent’s Validity