Industry Sector

Air pollution control — US PTAB Patent Cases

7 decisions indexed

Page 1 of 1 · 7 total

patent instituted

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

· IPR2025-00274

The PTAB instituted an inter partes review of MES, Inc.'s 10,343,114 B2 mercury‑removal patent after Berkshire Hathaway Energy and affiliates demonstrated a reasonable likelihood of success on claims 1‑30, citing obviousness over multiple prior‑art references.

patent

UNION ELECTRIC COMPANY et al. v.MES, Inc.

· IPR2025-01322

Union Electric has filed an IPR petition challenging 28 claims of the ’430 mercury‑removal patent, asserting lack of written description and that the claims are anticipated or obvious over six prior‑art references. The petition seeks institution and cancellation of the claims.

patent

UNION ELECTRIC COMPANY et al. v.MES, Inc.

· IPR2025-01117

Union Electric has filed an IPR petition challenging 29 claims of BirchTech’s mercury‑control patent, asserting lack of written description and anticipation/obviousness over multiple prior art references. The petition seeks institution and cancellation of the claims.

patent

PacifiCorp et al. v.MES, Inc.

· IPR2025-00425

PacifiCorp and affiliated utilities have filed a petition to invalidate MES’s ’225 mercury‑removal patent. The petition alleges lack of written‑description support, obviousness over prior art, and anticipation, and urges the PTAB not to deny institution.

patent

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

· IPR2025-00281

Berkshire Hathaway Energy and its affiliates have filed an IPR petition challenging 29 claims of a mercury‑removal patent, arguing obviousness and lack of priority support. The petition relies on prior art from early‑2000s conference papers and patents. Institution of the proceeding is pending.

patent

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

· IPR2025-00280

Berkshire Hathaway Energy filed an IPR petition seeking cancellation of 29 claims of U.S. Patent 10,596,517 covering mercury removal from flue gas, arguing obviousness and anticipation over multiple prior‑art references.

patent

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

· IPR2025-00422

Berkshire Hathaway Energy and its affiliates have filed an IPR petition seeking to invalidate 28 claims of U.S. Patent 10,668,430 covering mercury‑removal technology for coal‑fired power plants. The petition relies on obviousness and anticipation arguments over four prior‑art references and urges the Board not to deny institution under §§314(a) and 325(d).

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