CFR > Title 37 - Patents, Trademarks, and Copyrights > CHAPTER I—UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE > SUBCHAPTER A—GENERAL (parts 1 to 5) > PART 1—RULES OF PRACTICE IN PATENT CASES > SUBPART C—International Processing Provisions (§1.401 to §1.499) > 1.491—National stage commencement and entry.

1.491—National stage commencement and entry.

(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.

Code of Federal Regulations

[67 FR 523, Jan. 4, 2002]