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ARTICLE · 12 NOVEMBER 2025

Trending At The PTAB: A Potential Barrier To Serial Challenges

Finnegan, Henderson, Farabow, Garrett & Dunner LLP
Finnegan, Henderson, Farabow, Garrett & Dunner LLP
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Finnegan, Henderson, Farabow, Garrett & Dunner LLP

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USPTO Proposes Broader Restrictions on IPR: The USPTO's proposed rules would significantly restrict inter partes review (IPR) by barring challenges to patents that have already been adjudicated on validity...

United StatesIntellectual Property
  1. USPTO Proposes Broader Restrictions on IPR: The USPTO's proposed rules would significantly restrict inter partes review (IPR) by barring challenges to patents that have already been adjudicated on validity or patentability in any major forum, including district courts, the ITC, PTAB, or through reexamination. The proposed rules would also bar IPRs if another forum is more likely than not to make a validity or patentability determination before the PTAB's expected final written decision.
  2. Broader Stipulation Requirement for Petitioners: Petitioners would need to agree not to pursue any invalidity challenges under Sections 102 or 103 in any other proceeding if an IPR is instituted, creating a one-shot opportunity to contest a patent at the PTAB.

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