37 CFR 42.202: Time for filing

Taken from the Ninth Edition of the MPEP, Revision 10.2019, Last Revised in June 2020

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42.202    Time for filing.

  • (a) A petition for a post-grant review of a patent must be filed no later than the date that is nine months after the date of the grant of a patent or of the issuance of a reissue patent. A petition, however, may not request a post-grant review for a claim in a reissue patent that is identical to or narrower than a claim in the original patent from which the reissue patent was issued unless the petition is filed not later than the date that is nine months after the date of the grant of the original patent.
  • (b) The Director may impose a limit on the number of post-grant reviews that may be instituted during each of the first four one-year periods in which 35 U.S.C. 321 is in effect by providing notice in the Office’s Official Gazette or Federal Register. Petitions filed after an established limit has been reached will be deemed untimely.
[Applicability Note: Subpart C (Post-Grant Review) generally applies to patents issuing from applications subject to first-inventor-to-file provisions of the AIA. In addition, the Chief Administrative Patent Judge may, in the interests-of-justice, order an interference commenced before September 16, 2012 to be dismissed without prejudice to the filing of a petition for post-grant review. See § 42.200(d) and the Leahy-Smith America Invents Act, Public Law 112-29, sec. 6(f)(3)(A).]
[Added, 77 FR 48680, Aug. 14, 2012, effective Sept. 16, 2012]