Code of Federal Regulations Title 37. Patents, Trademarks, and Copyrights § 37.41.10 Correspondence addresses

(a) Appeals. Correspondence in an application or a patent involved in an appeal (subparts B and C of this part) during the period beginning when an appeal docketing notice is issued and ending when a decision has been rendered by the Board, as well as any request for rehearing of a decision by the Board, shall be mailed to:  Patent Trial and Appeal Board, United States Patent and Trademark Office, PO Box 1450, Alexandria, Virginia 22313–1450. Notices of appeal, appeal briefs, reply briefs, requests for oral hearing, as well as all other correspondence in an application or a patent involved in an appeal to the Board for which an address is not otherwise specified, should be addressed as set out in § 1.1(a)(1)(i) of this title.

(b) Interferences. Mailed correspondence in interference (subpart D of this part) shall be sent to Mail Stop INTERFERENCE, Patent Trial and Appeal Board, United States Patent and Trademark Office, PO Box 1450, Alexandria, Virginia 22313–1450.

(c) Trial Proceedings. Correspondence in trial proceedings (part 42 of this title) are governed by § 42.6(b) of this title.