Step-by-step · Search & clearance
How to do a trademark clearance search
A clearance search answers one question: is it safe to build a brand on this name? It goes beyond checking the USPTO database for a match. Here are the four stages, how to judge each result, and when a close call needs an attorney.
By Bill, Business Growth Expert · Verified and checked on October 22, 2026
Short answer
A trademark clearance search checks whether you can use and register a name before you invest in it. Run it in four stages: a quick knockout search, a full search of federal and state records with variants, a sweep for unregistered users online, and an analysis of each hit using the USPTO's likelihood-of-confusion factors. The result is a decision: go ahead, change the name, or stop.
How is a clearance search different from a knockout search?
| Knockout search | Clearance search | |
|---|---|---|
| Question it answers | Is there an obvious conflict? | Is this name safe to build on? |
| Sources | USPTO database, exact and close matches | USPTO, state records, web, marketplaces, domains, social media |
| Variants checked | A few | Spelling, sound, meaning, translations, plurals |
| Time | Minutes | Hours to days |
| Use it to | Throw out weak candidates fast | Make the final call before launch |
A knockout search is the first stage of clearance, not a substitute for it. For how to use the USPTO's Trademark Search tool itself, see our trademark search guide.
What happens at each stage?
- Knockout. Search the exact name in the classes you'll file in. An identical live mark for the same goods ends the search here.
- Full database search. Search the name's parts, misspellings, sound-alikes and translations across related classes. Include pending applications, because they can block you even though they aren't registered yet. Then check the trademark records of the states where you'll sell.
- Common-law sweep. Unregistered businesses can hold rights in their area through use alone. Search the web, Amazon, Etsy, app stores, social handles, domain names and state business filings. Our common law rights guide explains why these users matter.
- Analysis and decision. List every hit with its owner, goods, status and dates, then judge each one against the factors below. Record why you cleared the name. That record helps if questions come up later.
How do you judge whether a search result is a problem?
The USPTO uses the factors from In re E. I. du Pont de Nemours & Co. (1973) to decide likelihood of confusion. Not all thirteen matter in every case, and these six come up most often in clearance work:
| Factor | What to look at |
|---|---|
| How similar the marks are | Compared by sight, sound, meaning and overall impression, not letter by letter |
| How related the goods or services are | Different classes can still conflict if buyers expect one company to offer both |
| Trade channels and buyers | Same stores, same marketplaces and same customers raise the risk |
| How careful buyers are | Cheap impulse buys get less benefit from careful shoppers than expensive purchases |
| How many similar marks are in use | A crowded field of similar names means each one gets narrower protection |
| How strong the earlier mark is | Famous and invented marks get the widest protection |
The first two factors carry most weight. Our likelihood of confusion guide works through examples.
What should you do with what you find?
Stop
Identical or near-identical live mark for the same or closely related goods.
Get advice
Similar mark for related goods, or a well-known brand in a different field.
Usually fine
Only dead filings, or similar marks for unrelated goods sold to different buyers.
Treat dead filings with care. A cancelled registration can still belong to a business that is using the name without registering it, so look it up before you rely on it. And a clean result lowers your risk without guaranteeing approval: the USPTO can still refuse a name that is descriptive or otherwise unregistrable.
When do you need an attorney’s opinion?
Get a licensed trademark attorney's opinion when a hit lands in the middle tier, when you're about to spend real money on packaging, signs or a rebrand, or when an existing brand has already contacted you. Secure Mark USA is a filing service, not a law firm: we can run searches and file your application, but we don't give legal opinions on whether a name is safe to use. If you'd rather not do stages two and three yourself, see what our comprehensive search covers.
Start with stage one: a free knockout search.
Run a free trademark searchClearance search questions
What is a trademark clearance search?
A search done before you adopt a name to check whether you can use and register it. It covers federal and state records, unregistered users online, and an analysis of how likely each result is to cause confusion.
Is a USPTO search enough to clear a trademark?
No. The USPTO database doesn’t show businesses that use a name without registering it, and those businesses can still have rights in their area.
How long does a trademark clearance search take?
A knockout search takes minutes. A full clearance search with a common-law sweep and analysis usually takes from several hours to a few days, depending on how common the name is.
Does a clear search guarantee my application will be approved?
No. It lowers the risk of a conflict, but the USPTO examines every application and can refuse it for other reasons, such as the name being descriptive.
Should I search dead trademarks?
Yes. Dead filings don’t block registration on their own, but the owner may still be using the name and holding common law rights.
Related guides
Legal disclaimer: This guide is general information, not legal advice. Secure Mark USA is a trademark filing service, not a law firm. A clearance opinion on whether a name is safe to use must come from a licensed trademark attorney.
Sources
- USPTO: Trademark Search, checked October 22, 2026
- USPTO: Trademark Manual of Examining Procedure (§1207.01 likelihood of confusion; §1209 descriptive marks)
- 15 U.S.C. §1052(d): Refusal of marks likely to cause confusion
Verified and checked on October 22, 2026.