(a) (1) An appeal filed under the provisions of § 2.141(a) from the final refusal of an application must be filed within the time provided in § 2.62(a) . (2) An appeal filed under the provisions of § 2.141(b) from an expungement or reexamination proceeding must be filed within three months from the issue date of the final Office action. (3) An appeal is taken by filing a notice of appeal, as prescribed in § 2.126 , and paying the appeal fee. (b) (1) The brief of appellant shall be filed within sixty
Any request for rehearing or reconsideration, or modification of the decision, must be filed within one month from the date of the decision. Such time may be extended by the Trademark Trial and Appeal Board upon a showing of sufficient cause. 37 C.F.R. §2.144 54 FR 29554, July 13, 1989 Part 3 pertaining to both patents and trademarks is placed in the grouping pertaining to patents regulations. Part 4 is placed in the separate grouping of parts pertaining to patents regulations. Part 5 is placed in