C.F.R. » Title 37 » CHAPTER I—UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE › SUBCHAPTER A—GENERAL › PART 42—TRIAL PRACTICE BEFORE THE PATENT TRIAL AND APPEAL BOARD › Subpart C—Post-Grant Review

37 C.F.R. § 42.201

Who may petition for a post-grant review

Read at: eCFRecfr.gov CornellLII GovInfogovinfo.gov CasesGoogle Scholar

A person who is not the owner of a patent may file with the Office a petition to institute a post-grant review of the patent unless:

(a) Before the date on which the petition for review is filed, the petitioner or real party-in-interest filed a civil action challenging the validity of a claim of the patent; or

(b) The petitioner, the petitioner's real party-in-interest, or a privy of the petitioner is estopped from challenging the claims on the grounds identified in the petition.