(a) PATENT APPLICANT.-An applicant for a patent, any of whose claims has been twice rejected, may appeal from the decision of the primary examiner to the Patent Trial and Appeal Board, having once paid the fee for such appeal. (b) PATENT OWNER.-A patent owner in a reexamination may appeal from the final rejection of any claim by the primary examiner to the Patent Trial and Appeal Board, having once paid the fee for such appeal. 35 U.S.C. § 134 July 19, 1952, ch. 950, 66 Stat. 801; Pub. L. 98-622
(a) (1) Upon the issuance of a Right of Appeal Notice under § 1.953 of this title, the owner may appeal to the Board with respect to the final rejection of any claim of the patent by filing a notice of appeal within the time provided in the Right of Appeal Notice and paying the fee set forth in § 41.20(b)(1) . (2) Upon the issuance of a Right of Appeal Notice under § 1.953 of this title, the requester may appeal to the Board with respect to any final decision favorable to the patentability, including
(a) (1) Appellant(s) may once, within time limits for filing set forth in § 41.66 , file a brief and serve the brief on all other parties to the proceeding in accordance with § 1.903 of this title. (2) The brief must be signed by the appellant, or the appellant's duly authorized attorney or agent and must be accompanied by the requisite fee set forth in § 41.20(b)(2) . (b) An appellant's appeal shall stand dismissed upon failure of that appellant to file an appellant's brief, accompanied by the requisite