(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)Beginning of jurisdiction. Jurisdiction over the proceeding passes to the Board upon the filing of a reply brief under § 41.41 or the expiration of the time in which to file such a reply brief, whichever is earlier. (b)End of jurisdiction. The jurisdiction of the Board ends when: (1) The Director or the Board enters a remand order (see§§ 41.35(c) , 41.35(e) , and 41.50(a)(1) ), (2) The Board enters a final decision (see§ 41.2 ) and judicial review is sought or the time for seeking judicial review