15 U.S.C. § 1141n : US Code - Section 1141N: Rights of extension of protection

Search 15 U.S.C. § 1141n : US Code - Section 1141N: Rights of extension of protection

When a United States registration and a subsequently issued
certificate of extension of protection to the United States are
owned by the same person, identify the same mark, and list the same
goods or services, the extension of protection shall have the same
rights that accrued to the registration prior to issuance of the
certificate of extension of protection.