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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)

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