This guide is general legal information, not legal advice, and does not create an attorney–client relationship. Rules change and vary by state — verify current requirements with official sources or a licensed attorney.
Two brand owners can disagree about the same mark at two very different moments. If the disagreement surfaces while an application is still working its way toward registration, the tool is an opposition. If the registration already issued, the tool is a petition to cancel. Both are decided by the Trademark Trial and Appeal Board, an administrative tribunal inside the U.S. Patent and Trademark Office.
The timing difference is not a technicality — it changes the deadline, the grounds available, and often the outcome. Oppositions must be filed inside a narrow 30-day window that opens when a mark is published for opposition. Cancellations can be filed years later, but the list of usable grounds shrinks dramatically once a registration passes its fifth anniversary.
Key takeaways
- An opposition must be filed within 30 days of the mark's publication in the Trademark Official Gazette; extensions of time to oppose are available on request and can push that deadline out by several months.
- A cancellation is filed after registration. Most grounds — including likelihood of confusion and mere descriptiveness — are only available during the first five years.
- Under 15 U.S.C. § 1064, grounds such as genericness, functionality, abandonment, fraud, and misrepresentation of source can be raised at any time.
- The Board decides only whether a mark should be registered. It cannot award money, order an injunction, or stop anyone from using a mark in the marketplace.
- TTAB cases look like federal civil litigation on paper — pleadings, discovery, testimony, briefs — but there is no live trial; evidence goes in as depositions and declarations.
The publication window: 30 days that decide a lot
When an examining attorney approves an application, the mark is published in the Trademark Official Gazette. Publication is a public notice: anyone who believes they would be damaged by registration gets a chance to object before the mark issues. That chance lasts 30 days.
Thirty days is short, and the system knows it. A potential opposer who needs more time can file a request for an extension of time to oppose through the Board's electronic filing system. Initial extensions are routinely granted; further extensions require the applicant's consent or a showing of good cause, and the total extension period is capped. The practical result is that a watch service that catches a publication early can usually buy enough runway to investigate, contact the applicant, and try to negotiate a coexistence agreement before committing to a filed case.
Watch the deadline: Nobody sends you a personal notice that a competitor's mark has published. Monitoring is the brand owner's job, whether through a commercial watch service or regular searches of USPTO records. Missing the window does not extinguish your rights, but it forces you into the slower, narrower cancellation path later.
What an opposition can argue
An opposer must plead both an entitlement to bring the case — a real commercial interest that would be damaged by registration — and a substantive ground. Common grounds include:
- Likelihood of confusion with the opposer's earlier mark, judged on factors such as similarity of the marks, relatedness of the goods or services, trade channels, and the strength of the prior mark.
- Mere descriptiveness or deceptive misdescriptiveness, where the applied-for term simply describes a feature of the goods.
- Genericness, where the term is the common name for the product category itself.
- No bona fide intent to use the mark on the goods listed in an intent-to-use application.
- Dilution of a famous mark, and functionality where the applied-for matter is a product feature that works rather than merely identifies.
Cancellation and the five-year cliff
Once a mark registers, the opposition door closes and the cancellation door opens. Section 1064 sets the clock: a petition to cancel on most grounds must be filed within five years of the registration date. After that, only the grounds the statute preserves remain available.
| Ground | Available in first five years | Available at any time |
|---|---|---|
| Likelihood of confusion with a prior mark | Yes | No |
| Mere descriptiveness / lack of distinctiveness | Yes | No |
| The mark has become generic | Yes | Yes |
| The matter is functional | Yes | Yes |
| Abandonment through nonuse or loss of significance | Yes | Yes |
| Registration obtained by fraud | Yes | Yes |
| Mark misrepresents the source of the goods | Yes | Yes |
| Mark was never used in commerce on the listed goods | Available beginning three years after registration | Yes |
Two consequences follow. First, a registrant who survives five years and files a Section 15 declaration of incontestability gains meaningful insulation from the most common attacks. Second, a junior user who spots a problematic registration should act early rather than wait for a dispute to become commercially urgent — the calendar is unforgiving.
Abandonment deserves special attention because it is the ground most often created by the registrant's own conduct. Stopping use without intent to resume, or licensing a mark without controlling how it is used, can strip a registration of its foundation. That second risk is the subject of our guide to trademark licensing and quality control.
How a Board case actually runs
Oppositions and cancellations follow essentially the same procedural track, filed and managed through the Board's electronic systems described on the USPTO's TTAB page.
- Pleading. The challenger files a notice of opposition or petition to cancel identifying the mark, the challenger's basis for standing, and each ground. The registrant or applicant answers, usually within 40 days.
- Discovery conference and disclosures. The parties confer about claims, defenses, and settlement, then exchange initial disclosures. The Board actively encourages settlement at this stage.
- Discovery. Written discovery, document production, and depositions run on a scheduled period set by the Board, typically measured in months.
- Testimony periods. Each side presents evidence in its assigned window. Testimony comes in by deposition transcript or written declaration, along with notices of reliance on registrations, printed publications, and discovery responses.
- Briefing and optional hearing. The parties file trial briefs. Either side may request oral argument before a panel of administrative trademark judges, but argument is optional and no witnesses appear.
- Decision and appeal. A panel issues a written decision. A losing party may appeal to the U.S. Court of Appeals for the Federal Circuit on the Board record, or bring a civil action in federal district court where new evidence is allowed.
Cases commonly take one to two years or more from filing to decision, though a large share settle. Settlement often produces a consent or coexistence agreement, an amendment narrowing the identification of goods, or a surrender of the challenged registration.
What the Board can and cannot do
This is the single most misunderstood point about TTAB practice. The Board's jurisdiction is limited to the register. It can refuse registration, cancel a registration, or restrict the goods and services listed. It cannot award damages, order a party to stop using a mark, or resolve an infringement claim.
A brand owner who needs a competitor to stop selling must go to federal district court. Many disputes therefore run on two tracks, or the Board proceeding is suspended while the court case proceeds. Deciding which forum to use — and whether to use both — is a strategic question with real cost consequences, since Board practice is generally cheaper than district court litigation but delivers a narrower remedy.
The newer ex parte routes: expungement and reexamination
Not every problem needs a full contested proceeding. The USPTO also runs two ex parte routes aimed specifically at registrations covering goods or services where the mark was never actually used or was not in use at the relevant time. A third party petitions the Office with evidence of a reasonable investigation; the Office, not a Board panel, decides whether to institute. The registrant responds directly to the Office, and outcomes can be appealed to the TTAB.
These proceedings are considerably cheaper than a cancellation and target a specific problem: registers cluttered with overbroad claims of use that block later applicants. If a search turns up a blocking registration that looks dormant, checking whether an ex parte route fits is worth doing before budgeting for a contested case.
Example (hypothetical): A regional bakery clears a new product name and finds a five-year-old registration for a similar term covering "bakery goods; restaurant services; catering." Investigation suggests the registrant only ever sold packaged cookies. Rather than filing a full cancellation on confusion grounds — a claim now time-barred if the registration is more than five years old — the bakery may be better served by a nonuse-focused challenge aimed at the unused services.
Frequently asked questions
Do I have to oppose, or can I just wait and cancel later?
You can wait, but you lose options. Opposition is available on a wide range of grounds during the publication window. After registration, the same grounds are available for five years and then most of them disappear permanently. Waiting also means your competitor spends five years building goodwill and a presumption of validity that you will have to overcome.
How much does a TTAB proceeding cost?
Government filing fees are modest and are listed on the USPTO fee schedule, which changes periodically. The real cost is professional time through discovery and testimony. A case that settles at the discovery conference costs a fraction of one that goes to full briefing. Because the Board's remedy is limited to the register, budget expectations should be set against that narrower benefit.
Can I file an opposition myself?
Parties domiciled in the United States may represent themselves, though Board practice follows detailed procedural rules and the Federal Rules of Civil Procedure in significant part. Foreign-domiciled parties must be represented by a U.S.-licensed attorney. Self-representation is most workable for straightforward extension requests and early settlement discussions.
What does incontestability actually protect against?
A Section 15 declaration, available after five years of continuous use, removes several challenges — notably claims that the mark is merely descriptive or that someone else has superior rights. It does not immunize a registration. Genericness, functionality, abandonment, fraud, and misrepresentation of source remain live grounds no matter how old the registration is.
Does losing at the TTAB mean I have to stop using my mark?
No. A cancellation removes the federal registration and its nationwide presumptions, but common-law rights arising from actual use are a separate question decided by courts. In practice, losing the registration weakens enforcement considerably and often triggers a rebrand — but the Board itself issues no order about marketplace use.
Practical next steps
Three habits prevent most avoidable losses at the Board. Monitor publications so the 30-day window never passes unnoticed. Calendar the five-year anniversary of your own registrations and of any registration you might one day want to challenge. And keep continuous evidence of use, because abandonment and nonuse claims are won and lost on records the registrant either kept or did not.
If you are earlier in the process, the front-end work matters more than the litigation. Careful clearance and a well-drafted identification of goods — covered in our trademark registration guide — prevent a large share of oppositions from ever being filed. And if a registration is changing hands, its litigation history and use record belong on the checklist described in our guide to IP due diligence in transactions. For how trademark disputes sit alongside patents, copyrights, and trade secrets, see the intellectual property hub.
