Opposition
What is an Opposition?
An action that halts the registration of a trademark, pending the outcome of an appeal with the Trademark Trial & Appeal Board (TTAB).
A person who believes that he or she would be damaged by the registration of a mark on the Principal Register may oppose registration by filing a notice of opposition with the Board, and paying the required fee, within thirty days after the date of publication, or within an extension period granted
Trademark Manual of Examining Procedure 1503.01
