15 U.S.C. § 1064: Cancellation of registration

Within five years from the date of the registration of the mark under this chapter. Within five years from the date of publication under section 1062(c) of this title of a mark registered under the Act of March 3, 1881 , or the Act of February 20, 1905 . At any time if the registered mark becomes the generic name for the goods or services, or a portion thereof, for which it is registered, or is functional, or has been abandoned, or its registration was obtained fraudulently or contrary to the provisions of section 1054 of this title or of subsection (a), (b), or (c) of section 1052 of this title for a registration under this chapter, or contrary to similar prohibitory provisions of such prior Acts for a registration under such Acts, or if the registered mark is being used by, or with the permission of, the registrant so as to misrepresent the source of the goods or services on or in connection with which the mark is used. If the registered mark becomes the generic name for less than all of the goods or services for which it is registered, a petition to cancel the registration for only those goods or services may be filed. A registered mark shall not be deemed to be the generic name of goods or services solely because such mark is also used as a name of or to identify a unique product or service. The primary significance of the registered mark to the relevant public rather than purchaser motivation shall be the test for determining whether the registered mark has become the generic name of goods or services on or in connection with which it has been used. At any time if the mark is registered under the Act of March 3, 1881 , or the Act of February 20, 1905 , and has not been published under the provisions of subsection (c) of section 1062 of this title . At any time in the case of a certification mark on the ground that the registrant (A) does not control, or is not able legitimately to exercise control over, the use of such mark, or (B) engages in the production or marketing of any goods or services to which the certification mark is applied, or (C) permits the use of the certification mark for purposes other than to certify, or (D) discriminately refuses to certify or to continue to certify the goods or services of any person who maintains the standards or conditions which such mark certifies. At any time after the 3-year period following the date of registration, if the registered mark has never been used in commerce on or in connection with some or all of the goods or services recited in the registration: