1207.04(b) Filing Basis of Application Seeking Concurrent Use Registration
In an application based on use in commerce under 15 U.S.C. §1051(a), the applicant may seek concurrent use registration at the time the application is filed or in a subsequent amendment. See 37 C.F.R. §§2.42 and 2.73.
In an application based on a bona fide intent to use the mark in commerce under 15 U.S.C. §1051(b), the applicant may not amend to seek concurrent use registration until the applicant files an acceptable allegation of use. 37 C.F.R. §§2.73 and 2.99(g).
Applications based solely on §44 or §66(a) of the Trademark Act are not subject to concurrent use registration proceedings. 37 C.F.R. §2.99(g).