OpenAI’s failed UK trademark challenge deepens doubts over ‘GPT’ protectability
By Melissa Ritti ( September 18, 2026, 11:33 GMT | Comment) -- The UK Intellectual Property Office recently invalidated UK trademark rights in “GPT” and “ChatGPT” while rejecting OpenAI’s bid to block ChainGPT LLC from registering its name there. The decision gives UK applicants new ammunition to argue “GPT” describes, rather than identifies, the source of AI software.OpenAI’s policing of the “GPT” suffix is facing a new obstacle after the UK Intellectual Property Office stripped the artificial intelligence developer of UK rights in two core word trademarks and allowed a blockchain-focused rival’s application to advance....
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