Background
Coca-Cola sought to register a family of trademarks containing the word ZERO — such as COKE ZERO, SPRITE ZERO, and POWERADE ZERO. The USPTO’s examining attorney initially required Coca-Cola to disclaim the word ZERO as merely descriptive of a product characteristic (zero calories or zero carbohydrates), but Coca-Cola argued that ZERO had acquired distinctiveness as a source identifier and refused to disclaim. The USPTO accepted Coca-Cola’s claimed acquired distinctiveness and published the applications for registration.
Royal Crown Company, which markets beverages under names including DIET RITE PURE ZERO, opposed Coca-Cola’s registrations. Royal Crown contended that ZERO is generic for a category of beverages (zero-calorie drinks) and that Coca-Cola had not adequately shown acquired distinctiveness. After extended proceedings, the Trademark Trial and Appeal Board (TTAB) ruled in Coca-Cola’s favor, dismissing Royal Crown’s opposition. Royal Crown appealed to the Federal Circuit.
The Court’s Holding
The Federal Circuit vacated and remanded, finding that the TTAB had applied an incorrect legal standard in two ways. First, on genericness, the Board had framed the question too narrowly: it asked only whether consumers would understand ZERO to refer to the entire genus of beverages, rather than asking whether consumers understand ZERO to identify a key aspect or characteristic that defines a subcategory of beverages (zero-calorie drinks). The court held that a term can be generic not only when it names the entire genus but also when it names a subgenus or key characteristic of the genus — and the Board had failed to evaluate genericness under this broader standard.
Second, on acquired distinctiveness, the Board had discounted evidence of descriptive meaning in favor of evidence that consumers associate ZERO with Coca-Cola. The Federal Circuit held that the degree to which a term is descriptive matters: the more descriptive (or closer to generic) a term, the more evidence of acquired distinctiveness the applicant must produce to overcome the presumption against registration. The Board erred by not calibrating its analysis to account for how strongly descriptive ZERO was before evaluating whether Coca-Cola’s evidence of consumer association was sufficient to establish source identification.
Key Takeaways
- A term can be generic not just when it refers to an entire product category, but also when it refers to a key characteristic that defines a meaningful subcategory — expanding the genericness analysis beyond whole-genus identification.
- In assessing acquired distinctiveness, the TTAB must calibrate the evidentiary burden to the degree of descriptiveness: more descriptive terms require stronger and more abundant evidence that consumers have come to associate the term with a specific source.
- Brand owners seeking to register highly descriptive terms — particularly terms tied to product attributes like calorie content — face heightened scrutiny, and must do more than show market share or survey evidence of association.
- The decision underscored the tension between large brand owners leveraging their marketing scale to build “acquired distinctiveness” for otherwise descriptive terms, versus smaller competitors’ interest in keeping those terms available for industry use.
Why It Matters
The beverage industry has proliferated “zero” products — zero sugar, zero calories, zero carbs — across virtually every major brand. Whether the word ZERO can function as a trademark (rather than a product descriptor) has enormous practical stakes: if Coca-Cola can monopolize ZERO as a trademark across the beverage category, competitors face real constraints on how they describe their own low-calorie products.
Royal Crown v. Coca-Cola established important guardrails by insisting that the TTAB rigorously apply both the genericness doctrine and a calibrated distinctiveness standard before registering terms that describe widely-shared product characteristics. The decision reinforced that trademark law’s concern for competitive availability of descriptive terms — including terms that describe a defining characteristic of a product subcategory — is not overridden simply because a dominant market player has spent heavily to associate a descriptor with its brand.