(a) (1) Appellant may file a single request for rehearing within two months of the date of the original decision of the Board. No request for rehearing from a decision on rehearing will be permitted, unless the rehearing decision so modified the original decision as to become, in effect, a new decision, and the Board states that a second request for rehearing would be permitted. The request for rehearing must state with particularity the points believed to have been misapprehended or overlooked by

(a) The word "applicant" when used in this title refers to the inventor or all of the joint inventors, or to the person applying for a patent as provided in §§ 1.43 , 1.45 , or 1.46 . (b) If a person is applying for a patent as provided in § 1.46 , the word "applicant" refers to the assignee, the person to whom the inventor is under an obligation to assign the invention, or the person who otherwise shows sufficient proprietary interest in the matter, who is applying for a patent under § 1.46 and