66567075 - ketogenic diet with nutrition diagram written on a note.Yesterday the Trademark Trial and Appeal Board (“TTAB”) affirmed the refusal by the United States Patent and Trademark Office (“USPTO”) to allow a Florida company to register trademarks containing the word “Keto.”  In its ruling, the TTAB explained that the term “keto” is descriptive for ketogenic dietary products, even when combined with the other words making up the company’s trademark registrations.  With the popularity in ketogenic dieting and products, this may serve as an informative ruling going forward.