37 C.F.R. § 2.118 Undelivered Office notices.
Title 37 - Patents, Trademarks, and Copyrights
When a notice sent by the Office to any registrant is returned to the Office undelivered, additional notice may be given by publication in theOfficial Gazette for the period of time prescribed by the Director. [68 FR 55767, Sept. 26, 2003]
Title 37: Patents, Trademarks, and Copyrights
PART 2—RULES OF PRACTICE IN TRADEMARK CASES
Procedure in Inter Partes Proceedings
§ 2.118 Undelivered Office notices.
