Likelihood of Confusion
A likelihood of confusion refusal means an examining attorney compared your mark to an existing registration and concluded that buyers might think the two come from the same source. The analysis is not a vibe check. It runs through a specific set of factors, and which ones carry weight depends on your facts.
The framework examiners apply
The controlling analysis comes from the DuPont factors, set out in In re E. I. du Pont de Nemours & Co. Not every factor applies in every case. The examiner puts weight on the ones the evidence supports, and the whole point of your response is to move the factors that actually matter for your goods and your mark.
| Factor | What the examiner looks at | How you push back |
|---|---|---|
| Relatedness of the goods or services | Whether buyers would expect the same company to make both, even if the goods are not identical. | Show the goods come from different producers, or narrow your identification to remove the overlapping items. |
| Similarity of the marks | Appearance, sound, connotation, and overall commercial impression, not a side-by-side checklist. | Argue the dominant portion of each mark differs, or that the shared element is weak or common in the field. |
| Channels of trade | Whether the two would be sold in the same stores or on the same sites. | Show your goods move only through a distinct channel, such as prescription only or direct to businesses. |
| Classes of purchasers | Who buys, and how careful they are. | Show the buyers are professionals, regulators, or specialists who exercise real care. |
| Sophistication of buyers | Careful buyers are less likely to be confused, especially for expensive or regulated goods. | Document price, purchase process, and how decisions are made in the industry. |
| Fame or strength of the cited mark | A famous mark gets a very wide zone of protection, even across unrelated goods. | Show the cited mark is commercially weak, or that the field is crowded with close variations. |
| Number of similar third-party marks | A crowded field means each mark gets a narrower scope. | Submit third-party registrations and, better, real evidence of how widely those marks are used. |
| Conditions of sale and buyer care | Impulse purchases raise confusion risk; considered purchases lower it. | Describe the actual sales environment for your goods. |
How the mark comparison actually works
- The marks are compared as a whole but not mechanically. Examiners look at which part of a composite mark dominates the commercial impression and give shared, descriptive, or disclaimed elements less weight.
- Appearance and sound matter most for short word marks. Two one-word marks that rhyme and share a first syllable are close.
- Connotation matters when both marks suggest the same idea, even if they look and sound different.
- Commercial impression is the overall takeaway. The question is whether the average buyer would remember the two marks as essentially the same.
- A shared generic or highly descriptive word will rarely carry a confusion finding on its own, while a shared coined or arbitrary term usually will.
Weak marks get narrow protection
This is the most underused argument available to a small filer. If many companies already use close variations of the shared element, the cited mark is weak and its owner cannot reach very far. Third-party registrations help show the field is crowded, but evidence of how widely those marks are actually used in the market is far more persuasive on commercial strength.
Practical defensive moves
- Narrow the identification. Delete or restrict the goods that overlap with the cited registration. This is the highest-success, lowest-cost move available.
- Argue the differences in the marks, grounded in appearance, sound, connotation, and commercial impression rather than in your own view that they look distinct.
- Argue the goods are unrelated, with evidence about producers, channels, and buyers rather than bare assertions.
- Enter a disclaimer of the shared descriptive element, which reduces its weight and sometimes removes the overlap entirely.
- Get a consent agreement from the owner of the cited registration. The USPTO weighs it but is not bound by it, and a bare consent with no provisions for avoiding confusion carries little weight, so include real detail about channels and branding.
- Attack the cited registration only if you have grounds, such as non-use or abandonment. It is expensive and rarely the first move.
Things that do not help
- Pointing out that the cited mark is in a different international class. Classes are an administrative convenience and never control the analysis.
- Saying your company is small, new, or unknown. The test compares the marks and the goods, not the size of the businesses.
- Arguing that no one has actually been confused yet. The question is likely confusion in the market, not proven confusion.
- Claiming the USPTO searched the wrong mark. The examining attorney assigns the citation, and mistakes are rare.
If you cannot overcome a Section 2(d) refusal, the application goes abandoned and your filing fee is gone. Appealing to the TTAB costs $225 per class electronically and takes a long time, so weigh whether narrowing the identification would solve the same problem for free.
Frequently asked questions
Does being in a different class avoid a likelihood of confusion refusal?
No. International classes are administrative only. The examiner looks at whether the actual goods or services are related in the marketplace, regardless of the class numbers involved.
Will a consent agreement from the other trademark owner resolve the refusal?
It often helps and sometimes resolves it, but it is not binding on the USPTO. A detailed agreement explaining how confusion will be avoided carries far more weight than a short one.
Can I argue the cited mark is weak?
Yes. Third-party registrations showing a crowded field are relevant, and evidence of how widely those similar marks are actually used is stronger on the question of commercial strength.
Does disclaiming the shared word get rid of the refusal?
Sometimes. A disclaimer reduces the weight given to a descriptive shared element and can tip the comparison, but it will not help if the dominant, distinctive parts of the two marks are nearly identical.
What if I think the examiner cited the wrong registration?
That is uncommon. Read the cited registration's goods and status carefully first, then address the real comparison rather than assuming an error in the citation.
More in Office Actions & Refusals
Common Refusals
The most frequent reasons the USPTO refuses an application.
Disclaimer Requirements
Why you may be asked to disclaim part of your own mark.
Response Checklist
What to gather before you draft your Office Action response.
Descriptive, Geographic & Surname Refusals
Three distinct refusal types that get confused with each other.