[Code of Federal Regulations] [Title 37, Volume 1] [Revised as of July 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 37CFR2.118] [Page 295] TITLE 37--PATENTS, TRADEMARKS, AND COPYRIGHTS DEPARTMENT OF COMMERCE PART 2--RULES OF PRACTICE IN TRADEMARK CASES--Table of Contents Sec. 2.118 Undelivered Office notices. When the notices sent by the Patent and Trademark Office to any registrant are returned to the Office undelivered, or when one of the parties resides abroad and his representative in the United States is unknown, additional notice may be given by publication in the Official Gazette for such period of time as the Commissioner may direct.