This is Part 3 of a 5 part series on mere descriptiveness in trademark law. Part 1 explained what the refusal means. Part 2 covered how examiners build the evidentiary record. This post covers what happens when a mark is descriptive but has been in use long enough to acquire a secondary meaning that points to its source.
The Concept of Secondary Meaning
A descriptive term starts out communicating information about the product: what it does, what it contains, what it is like. Over time, through sustained and exclusive use in the marketplace, consumers can come to recognize the term not just as a description but as an identifier of a particular source. When that happens, the term has acquired a secondary meaning, or in trademark parlance, acquired distinctiveness.
The governing provision is Section 2(f) of the Lanham Act, which provides that nothing in the Act shall prevent the registration of a mark used by the applicant that has become distinctive of the applicant's goods in commerce. The question in every Section 2(f) claim is whether the mark, despite being descriptive, has come to identify the applicant as the source of those goods or services in the minds of the relevant purchasing public.
The standard is high. Secondary meaning is not established by use alone. It requires proof that the primary significance of the term in the minds of consumers is source identification, not product description.
What Evidence the USPTO Accepts
There is no single formula for proving acquired distinctiveness. The USPTO looks at the totality of the evidence, and different cases turn on different combinations of proof. The types of evidence that carry the most weight in Section 2(f) claims are as follows.
Duration and exclusivity of use. How long the mark has been used continuously and exclusively in the marketplace matters significantly. The Lanham Act creates a rebuttable presumption of acquired distinctiveness for marks that have been used in commerce exclusively and continuously for five years before the claim is made. That presumption does not guarantee registration, and the USPTO can still request additional evidence if the mark is highly descriptive, but five years of exclusive continuous use is a recognized threshold.
Sales and advertising figures. Evidence of substantial sales volume and advertising expenditures over the relevant period demonstrates that the mark has had meaningful exposure to the purchasing public. Dollar figures alone are not enough, but they contextualize the depth and duration of the mark's presence in the market.
Consumer declarations. Sworn statements from consumers attesting that they recognize the mark as identifying a single source, rather than describing a category of goods, are among the most direct forms of secondary meaning evidence. These declarations are particularly useful when sales and duration evidence alone might not be conclusive.
Unsolicited media coverage. News articles, reviews, and other third-party references to the mark that treat it as a brand name, rather than a descriptive phrase, support the inference that the public perceives it as a source identifier.
Survey evidence. A well-designed consumer survey directly measuring whether the relevant purchasing public associates the mark with a single source can be powerful. Surveys are expensive, and not every case warrants the investment, but in high-stakes prosecutions they can be dispositive.
Long-term use affidavits. An applicant's own declaration, attesting to the length and exclusivity of use with supporting documentation, is a standard component of most Section 2(f) claims.
The Highly Descriptive Problem
The strength of the evidence required to establish acquired distinctiveness is proportional to how descriptive the mark is. A mark at the border between suggestive and descriptive may require relatively modest proof. A mark that is highly descriptive, one that directly and unambiguously names a feature, ingredient, or characteristic of the product, will require substantially more. The USPTO has been explicit about this: the more descriptive the term, the higher the evidentiary bar for Section 2(f).
This creates a practical tension. A highly descriptive mark is often exactly the kind of name a business has built its identity around, because descriptive names are intuitive and easy for customers to remember. But the more intuitive the name, the harder it is to show that consumers have come to perceive it as a brand rather than just a description. The exclusivity of use requirement is also difficult to meet if competitors have been using similar language in the interim.
The Supplemental Register
When a mark is descriptive but lacks sufficient evidence of acquired distinctiveness to support a Section 2(f) claim, amending the application to the Supplemental Register is often the right tactical move.
The Supplemental Register is a separate federal registry for marks that are capable of distinguishing goods or services but have not yet acquired distinctiveness. Registration there does not carry the same legal presumptions as Principal Register registration. It does not create a presumption of validity, it does not give constructive notice to third parties, and it cannot become incontestable. But it is not without value.
Registration on the Supplemental Register gives the owner the right to use the federal registration symbol. It allows the USPTO to cite the registration in later proceedings against confusingly similar marks filed by others. It can serve as the basis for obtaining trademark protection in certain foreign countries under international agreements. And critically, time on the Supplemental Register counts toward the five-year exclusivity period that supports a future Section 2(f) claim on the Principal Register.
For a business that is early in building its brand and does not yet have the years of use or volume of evidence needed for a Section 2(f) claim, the Supplemental Register offers a way to secure some federal protection and begin accumulating the use history that a later Principal Register application will require.
Choosing Between the Two Paths
When a merely descriptive refusal arrives and the mark is genuinely descriptive, the decision comes down to the available evidence and the applicant's timeline and goals. If the mark has been in continuous, exclusive use for several years with meaningful sales and brand presence, a Section 2(f) claim may be viable and worth pursuing. If the evidence is thin, or if the refusal arrives early in the mark's commercial life, an amendment to the Supplemental Register preserves the application while the evidentiary record continues to develop.
Both paths require a realistic assessment of the evidence. A Section 2(f) claim that cannot be supported is not a strategy worth pursuing. The USPTO will require corroborating evidence, and a weak submission is unlikely to overcome a strong prima facie refusal.
Part 4 of this series covers how to respond to a merely descriptive office action: the arguments available, the deadlines that apply, and the options if the initial response does not succeed.
Five Dogs Law handles trademark prosecution and office action responses. If your application received a merely descriptive refusal and you want to understand whether a Section 2(f) claim or Supplemental Register amendment is the right move, book a free consultation
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