1.491 (pre‑AIA) National stage commencement and entry.[Editor Note: Not applicable to patent applications filed under 35 U.S.C. 111(a) or 363 on or after September 16, 2012*]
- (a) Subject to 35 U.S.C. 371(f), the national stage shall commence with the expiration of the applicable time limit under PCT Article 22(1) or (2), or under PCT Article 39(1)(a).
- (b) An international application enters the national stage when the applicant has filed the documents and fees required by 35 U.S.C. 371(c) within the period set in § 1.495.