"likelihood of confusion"

Updated: June 2021

U.S. Trademark Opposition: FAQ

A trademark opposition is a contested proceeding before the U.S. Trademark Trial and Appeal Board.   Any third-party may oppose the trademark application of another party.  An opposition may be filed only when the subject application is published in the Official Gazette of the U.S. Patent and Trademark Office.  The time to file an opposition is within 30 days of publication.  Extensions of time to file an opposition may be granted for an additional 30 days upon request, and up to 90 days for good cause shown.


Continue Reading Trademark Opposition Checklist for Opposers