OpenAI Just Lost a Major Trademark Battle. Here Is Why Every Founder Should Pay Attention.
On July 15, 2026, the EU General Court handed down a ruling that sent ripples through the startup and IP world. The General Court of the European Union (Eighth Chamber) decided Case T-555/25, OpenAI, Inc. v EUIPO, confirming the partial refusal to register the EU word mark OPENAI for a range of goods and services in Classes 9, 42 and 45. In plain English: one of the most recognized brand names in technology right now cannot be protected as a word trademark in the European Union for its core software and AI services.
This is not a minor procedural footnote. The EUIPO has refused to allow OpenAI to monopolize terms that describe the underlying technology. The message for the industry is that a trademark must indicate commercial origin, not the technology itself. If that principle applies to a company with billions in funding and global name recognition, it absolutely applies to your early-stage startup picking a name this week.
What Actually Happened
On June 15, 2023, OpenAI filed an application with the European Union Intellectual Property Office (EUIPO) to register the word mark OPENAI as a Union trademark. Following a restriction during the proceedings, the application covered goods and services in Classes 9, 38, 42, and 45, specifically software, development services, cloud applications, and identity verification.
The EUIPO partially refused registration, including for software, cloud computing services and identity verification services, on the ground that the mark was descriptive in relation to those goods and services. According to the EUIPO, for at least a non-negligible proportion of the English-speaking public, the term OPENAI immediately conveyed the message that the goods and services were provided using, or were connected with, openly accessible artificial intelligence.
OpenAI appealed. The appeal failed. OpenAI then brought the matter before the General Court of the European Union and sought to have that decision set aside. It raised three grounds of appeal: infringement of the ground for refusal regarding descriptive signs, infringement of the ground regarding signs lacking distinctive character, and infringement of the principles of equality and good administration, because the EUIPO had accepted similar trademarks in the past. The General Court dismissed the appeal in its entirety and ordered OpenAI to pay the costs.
OpenAI had two main arguments, and both were rejected. First, OpenAI had argued that the word "open" has multiple possible meanings and that "OPENAI" is a coined term without a fixed meaning. The court was not persuaded. OpenAI pointed out that "open" has countless meanings, but that does not help: it is sufficient that one of them, "freely accessible," describes the services. In trademark law, therefore, the argument that a word is multifaceted works against the applicant rather than helping them.
Second, OpenAI also cited comparable trademark registrations previously granted by the EUIPO and registrations in more than 30 other countries, including the United Kingdom and Singapore. The court ruled that the combination of words was not an unusual linguistic combination in English. Furthermore, registrations in other jurisdictions were not binding under EU trademark law.
There is one narrow path still open. The EU Intellectual Property Office may still consider whether widespread use has made the term distinctive enough to qualify for trademark protection. But that is a long, expensive road that most startups cannot afford to walk.
It is also worth noting that this ruling is part of a broader pattern. This judgment does not stand alone. In four decisions by the EUIPO's Cancellation Division dated October 17, 2025, the already registered word marks GPT, GPT-3, and GPT-4 were declared wholly invalid, and GPT-5 was declared partially invalid, in each case on the grounds of descriptiveness and lack of distinctiveness.
Why This Matters: The Descriptiveness Trap
Both US and EU trademark law share a core principle: you cannot lock up words that competitors need to describe their own products. The EUIPO ruled that the combination of the two common words in English, "open" and "AI," could describe many business activities in the area of artificial intelligence. EU regulations do not allow trademarking a brand that simply describes a product or service, as that would mean competitors could no longer use those terms in their advertising.
This is the "descriptiveness trap," and it catches thousands of startup founders every year. Names that feel creative and modern inside a founding team often turn out to be exactly what examiners and courts call "merely descriptive" of the underlying goods or services. The USPTO applies the same logic. If your name tells the customer what you do rather than who you are, you are going to have a problem.
This ruling is particularly instructive for companies, and their advisors, who are selecting a brand in technology-sensitive sectors. Anyone who builds a name using common, descriptive elements such as "smart," "cloud," "cyber," "AI," or "open," runs a real risk that the office will reject that name as descriptive, even if the combination feels fresh or unique.
5 Founder Takeaways From the OpenAI Ruling
- Descriptive names are a registration risk, not just a creative problem.
A name that describes what your product does, such as "OpenAI" describing openly accessible artificial intelligence, will face serious resistance at trademark offices in the US and abroad. The USPTO applies a similar standard under Section 2(e)(1) of the Lanham Act. Before you fall in love with a name, run a trademark availability check and honestly ask whether the name describes your service or identifies your brand.
- Combining two descriptive words does not make a protectable mark.
OpenAI argued that the compound "OPENAI" was a coined, invented term. The court disagreed, finding it was not an unusual linguistic combination. The same logic applies to names like "SmartCloud," "QuickPay," "FastShip," or "AIAssist." Stitching two descriptive words together rarely creates the distinctiveness that trademark law requires. You need a mark that functions as a source identifier, not a product description.
- Registration in one country does not guarantee registration everywhere.
Registrations in other jurisdictions were not binding under EU trademark law. If you plan to operate internationally, each major market, including the US, EU, and UK, evaluates your mark independently. A USPTO registration does not protect you in Europe. Build your naming strategy with global markets in mind from day one, and consult a qualified attorney if you plan to expand. You can find a trademark attorney here.
- Being famous does not cure descriptiveness.
A widespread misunderstanding should be avoided: the reputation of "OpenAI" as an undertaking cannot "save" the sign in terms of intrinsic descriptiveness. OpenAI is one of the most recognized brands in the world right now, and it still lost this fight. For a startup with no brand equity yet, the problem is even more acute. Do not assume that marketing spend will fix a weak name. Fix the name first.
- A phonetic and conceptual search is not optional.
Even if you choose a strong, distinctive name, you still need to verify that no one else already owns something confusingly similar. That means going beyond a basic keyword search. A proper trademark availability check includes phonetic variants, sound-alike marks, and conceptual equivalents. Knowing how to search a trademark properly, including a phonetic trademark search and a sound-alike trademark check, can save you from a costly rebrand after launch. Read our step-by-step guide on running a practical trademark search before launch.
FAQ
Is this legal advice?
No. This article is informational only and not legal advice.
Where should founders start?
Begin with a practical screening process in Trademark Search.
What should teams do before filing?
Review risk patterns, compare alternatives, and align on a filing plan in Pricing.
Informational disclaimer: this article is educational content and not legal advice.
Quick checklist
- Define naming goals and constraints.
- Screen for similar marks in adjacent categories.
- Compare top alternatives before committing.
- Document a clear go/no-go decision.
What should founders do if a match looks close?
Treat it as a review trigger and compare alternatives before proceeding.
How should teams prioritize multiple candidate names?
Rank names by defensibility, clarity, and strategic flexibility.
When should legal counsel be involved?
Involve counsel before filing and before major spend commitments.