(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
In addition to the definitions in § 41.2 , the following definitions apply to proceedings under this subpart unless otherwise clear from the context: Applicant means either the applicant in a national application for a patent or the applicant in an application for reissue of a patent. Evidence means something (including testimony, documents and tangible objects) that tends to prove or disprove the existence of an alleged fact, except that for the purpose of this subpart Evidence does not include