The 'OPENAI' Word Mark Fails in Europe: What AI Brands Must Learn About Descriptiveness

Fame Is Not a Trademark

On 15 July 2026, the General Court of the European Union handed down its judgment in Case T-555/25, OpenAI, Inc. v EUIPO. The outcome was unambiguous: the word mark OPENAI was refused registration for a range of goods and services including software, cloud computing services, and identity verification, covering Classes 9, 42 and 45.

The refusal was not a bureaucratic quirk. The Court upheld the European Union Intellectual Property Office's position that the word "open" would be understood by the relevant English-speaking public as meaning freely accessible, while "AI" straightforwardly denotes artificial intelligence. Together, EUIPO concluded, the compound simply describes "freely accessible artificial intelligence": a characteristic of the very goods and services the application sought to cover, rather than an indicator of commercial origin.

OpenAI had argued that the term was a coined compound with no fixed meaning, that "open" carries multiple senses, and that the EUIPO had already accepted comparable marks in the past. The company also pointed to registrations in more than 30 other jurisdictions, including the United Kingdom and Singapore. The Court rejected every ground: the linguistic combination was not unusual in English, and registrations in other legal systems carry no binding weight under EU trade mark law.

A Partial Defeat With a Partial Exit

The ruling is not a total foreclosure. The figurative mark (the OpenAI logo incorporating the word in a specific graphic design) remains registered (EU trade mark 018674416, for Classes 9 and 42). A pure word mark protects only the meaning of the letters; a figurative mark protects the specific visual treatment, which adds a layer the descriptiveness ground cannot reach.

There is a second lifeline. The Board of Appeal kept open the question of acquired distinctiveness under Article 7(3) of the EU Trade Mark Regulation: the route by which a descriptive sign can still secure registration if the applicant proves that consumers have come to associate it with one commercial source through intensive, sustained use. That review was explicitly separated from the inherent distinctiveness question settled by the General Court on 15 July. Once the judgment becomes final, EUIPO can conduct a full examination of whatever consumer-recognition evidence OpenAI submits. The ruling can itself still be appealed to the European Court of Justice.

The company is not stripped of its name. But until that secondary process is resolved, if it is pursued, the word OPENAI as a standalone EU mark remains unprotected for the core technology classes that matter most.

The Class Problem Is Bigger Than One Case

This ruling matters far beyond one company's portfolio. What the Court has effectively articulated is a principle: the technical vocabulary of artificial intelligence is, for the time being, part of a semantic public domain that examiners will not allow a single undertaking to monopolise through registration. Any brand name built on words such as "open", "smart", "neural", "deep", "intelligent" or "AI" itself faces the same descriptiveness trap the moment those words are applied to AI-related goods and services.

The Nice Classification makes this particularly acute. Class 42 covers software as a service, AIaaS (a term formally added to the 13th Edition of the Nice Classification in January 2026), technology platform services and related scientific R&D services, making it the natural home for most AI product filings. Class 9 catches software downloads and datasets. Class 45 covers identity verification and legal-adjacent services. All three were in scope in the OpenAI case. Brand owners naming AI products need to audit how descriptive their chosen marks are across each of those classes individually, because a mark that passes in Class 41 (education and training services) might fail in Class 42.

That point about Class 41 is not incidental. AI Business Dispatch analysis of Companies House (MC) and IPO (TMD) data, as of July 2026, shows that UK trademark filings in Class 41 reached just 2,433 in Q3 2026, a fall of 71.3% on the prior period. New SIC 69.10 company incorporations (the legal services cohort most likely to advise on or deliver AI-adjacent professional services) dropped to 160 in Q3 2026, down 77.3% year-on-year. Most strikingly, 98.9% of active SIC 69.10 companies hold no Class 41 trademark at all. The sector is generating entities faster than it is formalising the brand protection that would survive a descriptiveness challenge.

The Clarivate Trademark Filing Trends Report 2026 noted much the same thing at a global level: despite rapid commercial influence, most major AI companies did not feature among the highest trademark filers, suggesting brand formalisation in the sector is still emerging. The OpenAI ruling illustrates precisely what that lag costs.

What This Means for Brand Owners This Week

The practical read is this. If your AI product or service name contains words the average English-speaking consumer would recognise as describing a feature of artificial intelligence (accessibility, intelligence, automation, openness) you need professional advice on whether that name has a viable path to registration in Classes 9, 42 and 45 at the EUIPO, and separately at the UKIPO, which applies its own examination standards post-Brexit. The UKIPO has confirmed it is rolling out digital improvements and AI-assisted tools as part of its wider transformation programme, with changes to trademark services expected from September 2026 onwards, so the examination environment is shifting.

Acquired distinctiveness is not a fallback strategy for start-ups: it requires years of documented, intensive use across the EU territory. Figurative marks protect visual design, not the words themselves. Registrations in third countries, including the UK, will not persuade an EUIPO examiner.

The safest route remains what it has always been: choose an inherently distinctive name from day one, clear it across the relevant Nice classes, and file early. TrademarkDashboard (trademarkdashboard.com) allows free searching of the UK register by Nice class and owner, with AI-assisted clearance reports from £9.99. For EU clearance, consult a qualified trade mark attorney before investing in brand identity built on AI terminology.

OpenAI's figurative mark remains intact. Its word mark does not. That is, in miniature, the entire lesson.