Disclaimer of Elements in Marks
(a) The Director may require the applicant to disclaim an unregistrable component of a mark otherwise registrable. An applicant may voluntarily disclaim a component of a mark sought to be registered.
(b) No disclaimer, including those made under subsection (e) of section 7 of this Act, shall prejudice or affect the applicant's or registrant's rights then existing or thereafter arising in the disclaimed matter, or his right of registration on another application if the disclaimed matter be or shall have become distinctive of his goods or services.
In a trademark application or registration, a disclaimer is a statement that the applicant or registrant does not claim the exclusive right to use a specified element or elements of the mark. A disclaimer may be included in an application as filed or may be added by amendment, e.g., to comply with a requirement by the examining Advocate.
The purpose of a disclaimer is to permit the registration of a mark that is registrable as a whole but contains matter that would not be registrable standing alone, without creating a false impression of the extent of the registrant's right with respect to certain elements in the mark. As stated in Horlick's Malted Milk Co. v. Borden Co., 295 F. 232, 234, 1924 C.D. 197, 199 (D.C. Cir. 1924):
[T]he fact that a mark contains descriptive words is not enough to warrant a refusal to register it. Unless it consists only of such words, it may not be refused a place on the registry of the Patent Office.
The significance of a disclaimer is conveyed in the following statement:
As used in trade mark registrations, a disclaimer of a component of a composite mark amounts merely to a statement that, in so far as that particular registration is concerned, no rights are being asserted in the disclaimed component standing alone, but rights are asserted in the composite; and the particular registration represents only such rights as flow from the use of the composite mark.
Sprague Electric Co. v. Erie Resistor Corp., 101 USPQ 486, 486-87 (Comm'r Pats. 1954).
A disclaimer may be limited to pertain to only certain classes, or to only certain goods or services.