Limitations of suits to annul patents
43 U.S.C. § 2506
in effectSuits by the United States to vacate and annul any patent shall only be brought within six years after the date of the issuance of such patents.
Source: OLRC USLMURL: https://uscode.house.gov/download/releasepoints/us/pl/119/95/xml_usc43@119-95.zipFetched: 6/7/2026
