Birchtech says all patent challenges at PTAB end as IPR petitions are terminated

Birchtech Corp.

Birchtech Corp.

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  • Birchtech moved to terminate all remaining PTAB inter partes review petitions challenging its SEA mercury-removal patents, ending active validity fights.
  • All IPR petitions were dismissed, withdrawn before institution, or resolved; prior challengers are barred from further validity attacks on the patents.
  • A Delaware federal court increased a final judgment to USD 78.4 million in December 2025, following a March 2024 jury verdict on willful infringement.
  • Separate utility-defendant cases filed in 2024 and 2025 were consolidated in the Southern District of Iowa; related IPR filings sought to invalidate the patents.
  • Patent enforcement since 2019 has generated about USD 37 million in license fees and settlements; collection efforts on the USD 78.4 million award continue.


Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Birchtech Corp. published the original content used to generate this news brief via GlobeNewswire (Ref. ID: 202606030831PRIMZONEFULLFEED9730985) on June 03, 2026, and is solely responsible for the information contained therein.

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