How to Oppose a Trademark Application

Filing means submitting a notice of opposition through the USPTO’s ESTTA system before the publication window closes, at $600 per class opposed. The deadline itself is preserveable: a first 30-day extension is free on request, so the decision does not have to be made inside the original window. Most oppositions end in settlement, amendment, or withdrawal rather than a TTAB ruling.

Why the publication window is the cheap checkpoint

After an examiner approves a US trademark application, the mark is published in the Trademark Official Gazette, a weekly public notice that starts a 30-day clock. Any person who believes they would be damaged by the registration may oppose during that window. If nobody does, the mark proceeds to registration or a notice of allowance.

Opposition is leverage. Before registration you are blocking a pending right; after registration you are attacking an existing one through a petition to cancel, where the registrant enjoys a presumption of validity. And the longer a registration stands, the narrower your grounds become: once a US registration is five years old, cancellation is limited to a short list such as abandonment, fraud, or genericness under 15 U.S.C. § 1064(3). Descriptiveness and likelihood-of-confusion arguments that could have stopped the mark in week one fall away.

Step 1: Confirm what is actually being opposed

Oppositions run against specific applications, not brand names in the abstract. Before doing anything, pin down from the register entry:

• Serial number and publication date, which fix the opposition deadline.
• The mark itself and whether it is a word mark, logo, or both.
• The classes and goods/services listed. Conflict risk lives in overlap, not identical wording; a similar mark in unrelated goods is a much weaker position.
• The owner. A subsidiary, franchisee, or former partner filing may call for a contract conversation rather than a proceeding.
• The filing basis. US applications under Section 1 or 44 and Madrid Protocol designations under Section 66(a) are all opposed the same way through ESTTA, but the downstream rules differ.

Step 2: Preserve the deadline before deciding

The US 30-day window is short, and it does not pause while you think. The cheap move is an extension of time to oppose, filed through ESTTA before the deadline:

• A first 30-day extension is granted on request, free of charge.
• An initial request can instead ask for 90 days, granted for good cause on payment of a $200 fee.
• A further 60-day extension ($200) requires good cause, and a final 60-day extension ($400) requires the applicant’s consent or a showing of extraordinary circumstances. Extensions cannot exceed 180 days total from publication.

Extensions are personal: you cannot piggyback on someone else’s. This is also where weekly register monitoring earns its keep, since a filing caught at publication leaves the whole 30-day decision window intact rather than compressing it to days.

Step 3: Weigh the grounds and the alternatives

US oppositions are heard by the Trademark Trial and Appeal Board (TTAB). Common grounds include likelihood of confusion with a prior mark, mere descriptiveness, genericness, abandonment of an earlier mark, fraud on the Office, and dilution for famous marks. The pleading must state grounds, but the realistic questions come first:

• How strong is the overlap? Similarity of the marks plus relatedness of the goods drives likelihood-of-confusion analysis.
• Are your rights earlier and provable? A registration is the cleanest foundation; common-law rights work but need evidence of prior use.
• Is there a cheaper channel? A USPTO letter of protest ($150) asks the Office to refuse the application on legal grounds without becoming a party to a proceeding. A direct approach to the applicant can also produce a consent or coexistence agreement.
• What does resolution look like? Most oppositions never reach a ruling. TTAB statistics for fiscal year 2025 record 7,650 oppositions filed and 9,642 proceedings terminated without a decision, against 190 final decisions issued. Settlement, amendment of the goods, or withdrawal is the typical endpoint.

Step 4: File, or deliberately watch

A US notice of opposition goes through ESTTA at $600 per class, paid for each class opposed. The proceeding then runs like a compressed trial on a written record: answer, discovery, testimony periods, briefs. An applicant who never answers defaults.

In the EU, the equivalent is an EUIPO opposition filed within three months of publication, at €320. EUIPO opens with a cooling-off period of two months, extendable once by 22 months to a maximum of 24 months, during which the opposition fee is refunded if the case is withdrawn. Grounds are relative: earlier EU or national marks and other prior rights.

For marks filed through the Madrid System, each designated office applies its own opposition rules and window, so a WIPO designation of the US is opposed at the TTAB on the US timetable.

Whatever posture you choose, including simply watching the application proceed, keep the record: screenshots of the register entry, the publication date, and your own prior-use materials. The facts that decide these proceedings are the ones that can be dated.

How monitoring fits

Publication happens once per application and the clock starts immediately. Trademark monitoring surfaces conflicting filings while they are still applications, early enough to use the free extension path, open a coexistence discussion, or brief counsel with weeks to spare instead of days.