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Trademark Valet

Research library · Guide

How the USPTO decides whether two trademarks are too close

Lawyers call this: likelihood of confusion · Section 2(d)

Short answer

The USPTO refuses a trademark application under Section 2(d) when your mark, used on your goods, would probably confuse ordinary buyers about who is behind the product. The Board decides that by weighing the DuPont factors — thirteen of them, but two do most of the work: how similar the marks are, and how related the goods or services are.

A refusal is not a rejection. It is the examining attorney’s position, and you get to answer it.

Why it matters

If the refusal stands, the application dies and the money spent on it is gone. Keeping the application alive preserves the filing date. If the mark ultimately registers, that filing date can matter to nationwide priority under Section 7(c), subject to earlier users and other earlier priority rights.

The governing law

Section 2(d) of the Lanham Act, 15 U.S.C. § 1052(d), bars registration of a mark that so resembles a registered mark as to be likely to cause confusion, mistake, or deception. The factors come from In re E.I. du Pont de Nemours & Co., 476 F.2d 1357 (C.C.P.A. 1973).

Not every factor matters in every case. Only the factors of significance to the particular mark need be considered, and they are weighed rather than counted. See In re Mighty Leaf Tea, 601 F.3d 1342, 1346 (Fed. Cir. 2010).

The Board applies the factors for which there is evidence in the record. Silence on a factor is not a finding.

The DuPont factors

The thirteen du Pont factors, in their conventional order. The count beside each is the number of records in this library that carry a finding on it, whether neutral, weighing for or against confusion, or driving the result.

Each factor has its own page:

What this corpus shows about Section 2(d)

Most writing about Section 2(d) recites the factors. This is how they were coded across the decisions in this library.

How often each factor bore on the result

Which way the first two factors cut

In the Section 2(d) decisions coded in this library, factors 1 and 2 were the factors most often identified as driving the result.

FactorDispositiveDispositive — Favored ApplicantDispositive — Favored Opposer or RefusalFavored ApplicantFavored Opposer or RefusalNeutralSignificant
1. Similarity of the marks9310111—4
2. Relatedness of the goods or services8111112—4
3. Similarity of trade channels1—3215—6
4. Conditions of sale and buyer sophistication—224105—
Method. n = 38 records in which at least one du Pont factor was coded, drawn from a library of 178 Board decisions coded to a fixed schema as of 2026-09-19. A record is counted for a factor when its coding carries a finding on that factor. A record is one application or proceeding number, so consolidated proceedings count more than once. The chart counts each record’s first coded finding per factor; known coding defects are described on the factor guides. This is a curated library, not a random sample of all TTAB decisions. The counts describe this library. They are not a probability and not an estimate of any wider population.

Important decisions

See all 178 decisions →

What to do next

If you have a refusal in hand, most pre-registration Office Actions give you three months from the issue date, with a one-time three-month extension available for a fee. Section 66(a) applications work differently. Your letter states the deadline that applies to you. Read the examining attorney’s evidence before you read the refusal — the evidence is usually where the answer is.

Comparing one mark against one registration on clearly unrelated goods is often a call you can make yourself. A refusal in hand, or a close mark on the same goods, is where an attorney’s read pays for itself.

If you have a refusal, Valet Law, PLLC can review the examining attorney’s evidence and tell you what the response has to show.

Attorney review is provided by Valet Law, PLLC. Keep confidential facts out of public tools. Your first message to Valet Law should identify the parties and the general issue only. Wait until Valet Law confirms it can discuss the matter before sending confidential details.

Update log

2026-09-19Page created. Corpus counts computed from 178 analyzed decisions.

Who checked this

Reviewed and approved by Brandon Leavitt on 2026-10-02.

General information about how trademark law works. It is not legal advice about your situation, and reading it does not make anyone your lawyer.