Are you worried your new brand name might be too similar to an existing trademark? Or perhaps you’ve already received an Office Action from the USPTO claiming a “likelihood of confusion.”
When examining trademark applications, the USPTO doesn’t just rely on a gut feeling to decide if two marks are too similar. Instead, examining attorneys use a very specific set of legal guidelines known as the DuPont factors.
Below is an edited transcript of our video explaining what the DuPont factors are, how they work, and why navigating them can be one of the most challenging “gray areas” in trademark law.
What is the DuPont Case?
The framework the USPTO uses comes from a landmark 1973 legal case: In re E. I. DuPont de Nemours & Co. In this case, the court established 13 specific criteria—now universally known as the DuPont factors—that must be considered when determining whether a “likelihood of confusion” exists between two trademarks. If the USPTO believes consumers would mistakenly assume your goods or services come from the same source as another brand, your application will be rejected.
The 13 DuPont Factors
While not every factor applies to every single case, the USPTO evaluates the following 13 elements during a confusion analysis:
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Similarity of the marks: How similar are the marks in their appearance, sound, connotation, and commercial impression?
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Similarity of the goods or services: How closely related are the products or services offered under the marks?
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Trade channels: Are the items sold in similar stores or to the same types of consumers?
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Conditions of sale: Are the goods impulse buys, or are they expensive items purchased by careful, sophisticated buyers?
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Fame of the prior mark: Is the existing trademark highly recognizable and famous?
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Similar marks in use: How many other similar marks are already being used on similar goods?
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Actual confusion: Is there any evidence that consumers have already been confused in the real world?
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Concurrent use without confusion: Have both marks been used in the market for a long time without anyone getting confused?
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Variety of goods: Is the prior mark used on a wide variety of goods?
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Market interface: Is there any agreement or relationship between the applicant and the owner of the prior mark?
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Right to exclude: To what extent does the applicant have the right to exclude others from using the mark?
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Potential confusion: What is the extent of potential confusion?
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Other probative facts: Are there any other established facts that affect the analysis?
The “Big Two” You Need to Know
While looking at a list of 13 legal factors can be overwhelming, the reality of everyday trademark examination is a bit more focused.
Key Takeaway: The first two factors—the similarity of the marks and the similarity of the goods or services—carry the vast majority of the weight in almost every USPTO decision.
If your mark looks or sounds similar to an existing one, and you sell related products, it is highly likely to trigger a confusion refusal, regardless of how the other 11 factors shake out.
Navigating the “Gray Area” of Trademark Law
Unlike some areas of law that are black and white, a likelihood of confusion analysis is incredibly subjective. It requires an examining attorney to weigh multiple variables, balance evidence, and make a judgment call.
Because there is no simple mathematical formula to determine confusion, having an experienced trademark attorney on your side is critical. An expert can evaluate these factors before you apply, helping you avoid costly rejections, or craft a sophisticated legal argument to overcome an Office Action if you’ve already been cited for confusion.
Need help navigating a likelihood of confusion analysis? Don’t leave your brand’s protection up to chance. Contact our team today to schedule a consultation.
