37 CFR 2.72: Amendments to description or drawing of the mark.

(a) In an application based on use in commerce under section 1(a) of the Act, the applicant may amend the description or drawing of the mark only if:

(1) The specimens originally filed, or substitute specimens filed under § 2.59(a), support the proposed amendment; and

(2) The proposed amendment does not materially alter the mark. The Office will determine whether a proposed amendment materially alters a mark by comparing the proposed amendment with the description or drawing of the mark filed with the original application.

(b) In an application based on a bona fide intention to use a mark in commerce under section 1(b) of the Act, the applicant may amend the description or drawing of the mark only if:

(1) The specimens filed with an amendment to allege use or statement of use, or substitute specimens filed under § 2.59(b), support the proposed amendment; and

(2) The proposed amendment does not materially alter the mark. The Office will determine whether a proposed amendment materially alters a mark by comparing the proposed amendment with the description or drawing of the mark filed with the original application.

(c) In an application based on a claim of priority under section 44(d) of the Act, or on a mark duly registered in the country of origin of the foreign applicant under section 44(e) of the Act, the applicant may amend the description or drawing of the mark only if:

(1) The description or drawing of the mark in the foreign registration certificate supports the amendment; and

(2) The proposed amendment does not materially alter the mark. The Office will determine whether a proposed amendment materially alters a mark by comparing the proposed amendment with the description or drawing of the mark filed with the original application.