37 C.F.R. § 2.182 Time for filing renewal application.
Title 37 - Patents, Trademarks, and Copyrights
An application for renewal must be filed within one year before the expiration date of the registration, or within the six-month grace period after the expiration date of the registration. If no renewal application is filed within this period, the registration will expire. [64 FR 48926, Sept. 8, 1999]
Title 37: Patents, Trademarks, and Copyrights
PART 2—RULES OF PRACTICE IN TRADEMARK CASES
Term and Renewal
§ 2.182 Time for filing renewal application.