Chat, GPT, and 2(e) – The TTAB Rejects CHATGPT’s Inherent Distinctiveness Case

The CHATGPT brand has exploded into the public consciousness over the past two years, but how many people can confidently tell you what “GPT” actually stands for?  (If you, like me, were previously unaware – it’s “generative pre-trained transformer.”)  Even so, the U.S. Patent & Trademark Office’s Trademark Trial and Appeal Board (TTAB) recently refused registration of the CHATGPT trademark as merely descriptive under Section 2(e)(1) of the Lanham Act, in its recent decision In re OpenAI OpCo, LLC (TTAB Mar. 4, 2026).

Notably, the TTAB only addressed the CHATGPT mark’s inherent distinctiveness, as the Examining Attorney had already accepted OpenAI’s Section 2(f) claim that the mark had acquired distinctiveness sufficient to overcome the descriptiveness hurdle. OpenAI nonetheless appealed the inherent distinctiveness refusal with extensive arguments and consumer survey evidence – perhaps in an effort to further shore up its brand protection and strengthen its enforcement reach against other brands incorporating the same or similar elements.

In rejecting OpenAI’s inherent distinctiveness arguments, the TTAB considered the component parts, “CHAT” and “GPT,” and found both to be descriptive in the context of the CHATGPT chatbot software goods and services.

First, the Board held that the term “Chat” immediately describes conversational software, particularly where the covered goods and services in the application itself reference chatbot functionality – rejecting OpenAI’s argument that this term can convey multiple meanings and should be viewed as suggestive.

Next, the Board found the initialism “GPT” to be a “recognized” acronym for “generative pre-trained transformer,” a term of art describing the underlying technology used to generate human-like text (although this conclusion may overstate current consumer understanding of the term). Altogether, the Board held that the CHATGPT mark conveys exactly what the product is and does, without requiring the relevant consumers – an apparently limitless group encompassing ”software developers and the general public” – to use their imagination or take mental leaps.

Of course, the TTAB’s refusal on inherent distinctiveness grounds does not mean that CHATGPT will not be protected by the desired federal trademark registration – OpenAI’s alternate Section 2(f) claim, which was not at issue in this appeal, enables the application’s registration based on OpenAI’s (substantial) acquired distinctiveness evidence.

So how would ChatGPT itself characterize the takeaway from the TTAB’s decision? “For companies building products in fast-moving AI markets, the ruling serves as a reminder that distinctive branding—beyond descriptive references to the technology itself—remains critical for securing and maintaining strong trademark protection.” Personally, I’ll skip the emdashes – but overall, not bad for a Generative Pre-trained Transformer chatbot.