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*] [Added, 52 FR 20050, May 28, 1987; revised, 66 FR 45775, Aug. 30, 2001; revised, 67 FR 520, Jan. 4, 2002, effective Apr. 1, 2002] [*See § 1.491  for more information and for the rule applicable to patent applications filed under 35 U.S.C. 111(a)  or 363  on or after Sept. 16, 2012]