How to Trademark a Business Name in Connecticut (2026)

Fact-checked by the LegalGlass editorial team against primary sources · Published Aug 6, 2026 · Last updated Aug 6, 2026

You can protect a business name two ways in Connecticut: register a state trademark with the Connecticut Secretary of the State for use within Connecticut, or file a federal trademark with the USPTO (using the Trademark Center) for nationwide rights. Federal registration is stronger and the ® symbol may only be used after the USPTO registers the mark.

State vs. Federal Trademarks

A trademark is a word, phrase, logo, or design that identifies the source of goods or services. In Connecticut you can register a mark at the state level with the Connecticut Secretary of the State, which gives rights within Connecticut and is generally faster and cheaper. Federal registration with the USPTO gives nationwide constructive notice, the ability to use ®, and access to federal courts under the Lanham Act.

Most businesses that operate across state lines or online choose federal registration because state rights stop at the Connecticut border. State registration can still make sense for a purely local business. Neither replaces forming the entity itself; see how to form an LLC in Connecticut and our trademark hub for the full comparison.

Step 1: Search Before You File

A clearance search is the most important step. Search the USPTO trademark database for identical and confusingly similar marks in your class, then check the Connecticut Secretary of the State records and general web and business-name sources. A mark that is likely to be confused with an existing registration will be refused, and the filing fee is non-refundable.

Avoid marks that are merely descriptive or generic; distinctive, coined, or arbitrary names are far easier to register and defend. Confirm the name is also available as a business entity name in the Connecticut entity search and, ideally, as a domain. A name can be available to register as an LLC yet still infringe a trademark, so treat the two searches separately.

Step 2: File a Federal Trademark with the USPTO

File federally through the USPTO's online Trademark Center. You choose a filing basis (use in commerce or intent to use), identify the goods or services in the correct international class, and submit a specimen showing the mark in use if you are already selling. The Lanham Act (15 U.S.C. § 1051) governs the application.

The USPTO charges a fee per class of goods or services, set in its published fee schedule; multi-class applications cost more. After filing, an examining attorney reviews the application, may issue an office action, and if the mark clears, it is published for opposition before registering. From filing to registration commonly takes many months, so file early.

Step 3: Register a Connecticut State Trademark (Optional)

If your business is Connecticut-only, a state registration with the Connecticut Secretary of the State may be enough. You file an application identifying the mark, the goods or services, and the date of first use in Connecticut, and pay the state fee. State registration is typically issued for a set term and must be renewed.

State trademark rights are limited to Connecticut and do not stop a business in another state from using a similar name. They also do not grant the federal ® symbol. Many owners start with common-law ™ rights from actual use, add a state registration for local certainty, and file federally when they expand. Confirm current Connecticut forms and fees on the Connecticut Secretary of the State website.

Using ™, SM, and ® Correctly

You may use the ™ symbol (or SM for a service mark) with any mark you claim, even without registration, to signal common-law rights. The ® symbol is different: federal law permits it only after the USPTO has registered the mark. Using ® on an unregistered mark can jeopardize enforcement.

Registration is not required to have some rights, because trademark rights in the United States arise from use in commerce. But registration, especially federal, dramatically strengthens and simplifies enforcement. Keep records of your first-use dates and how you display the mark, and pair the trademark with the correct entity and DBA filings.

Maintaining and Enforcing the Mark

A federal registration must be maintained with periodic filings, including declarations of continued use, or it will be cancelled. Diary those deadlines when the mark registers. State registrations carry their own renewal terms with the Connecticut Secretary of the State. Letting either lapse can forfeit the protection you paid for.

Enforcement is the owner's responsibility. Monitor for infringing uses, and be prepared to send cease-and-desist letters or oppose conflicting applications. A trademark protects a brand name but does not protect an invention (patents) or creative work (copyright). For related tax and structure questions, see Connecticut LLC tax filing and business tax.

Choosing the Right Class of Goods or Services

Trademarks are registered for specific goods or services grouped into international classes. Your rights extend only to the classes you register in and to related goods where confusion is likely, so choosing the correct class or classes matters. A bakery selling bread registers in a different class than a company offering software, and a business that both makes a product and offers a service may need multiple classes.

Because the USPTO charges a fee per class, a multi-class application costs more, but under-claiming can leave part of your brand unprotected. Describe the goods or services accurately; overly broad descriptions draw refusals, and overly narrow ones limit your protection. If you are unsure how to classify your offering, the USPTO's identification manual and its examining attorneys provide guidance, and many owners consult a trademark attorney before filing to get the class and description right the first time. In Connecticut, the state registration with the Connecticut Secretary of the State uses a similar class-based approach.

Common Trademark Mistakes to Avoid

The most frequent mistake is skipping a real clearance search and filing for a mark that is already taken or too similar to an existing one — the fee is non-refundable, and a refusal wastes months. A close second is choosing a descriptive or generic name that simply describes the product, which is hard or impossible to register. Distinctive, coined, or arbitrary marks are far stronger and cheaper to protect over time.

Other pitfalls include using the ® symbol before federal registration is granted, filing in the wrong class, submitting an inadequate specimen of use, and letting maintenance deadlines lapse so the registration is cancelled. Confusing a business name or DBA registration with trademark protection is also common: neither clears a mark for trademark purposes. Treat entity naming, DBA filing, and trademark protection as three separate steps, and search each before you commit to signage, packaging, and marketing spend.

Frequently Asked Questions

How do I trademark a business name in Connecticut?

Search existing marks, then either register a state trademark with the Connecticut Secretary of the State for Connecticut-only rights or file federally with the USPTO for nationwide protection. Federal filing is done online through the Trademark Center.

How much does a federal trademark cost?

The USPTO charges a filing fee per class of goods or services, set in its published fee schedule. Multi-class applications cost more, and the fee is not refundable if the mark is refused.

What is the difference between ™ and ®?

You can use ™ with any mark you claim through use, without registration. The ® symbol is allowed only after the USPTO federally registers the mark; using it before then can harm enforcement.

Is a Connecticut state trademark enough?

A Connecticut registration protects the mark only within Connecticut. If you sell across state lines or online, federal USPTO registration is stronger because it provides nationwide rights.

Do I need to register to have any rights?

No. Trademark rights arise from use in commerce, giving common-law ™ rights. But registration, especially federal, greatly strengthens and simplifies enforcement of those rights.

Related

• Trademark basics (hub)
• DBA vs. trademark
• Form an LLC in Connecticut
• Connecticut business entity search
• How to form an LLC (cluster hub)
• How to get an EIN
• Business tax basics
• Registered agent overview
• Legal glossary

Sources

1. Connecticut Secretary of the State - Business division (formation, filings, and fee schedule).
2. Connecticut Secretary of the State - Business services.
3. USPTO - Trademark basics.
4. USPTO - Search trademark database.
5. USPTO - Apply for a trademark (Trademark Center).
6. USPTO - Trademark fee information.
7. USPTO - State trademark information links.
8. Cornell LII - 15 U.S. Code § 1051 - Application for registration (Lanham Act).
9. Cornell LII - 15 U.S. Code § 1127 - Construction and definitions (trademark).
10. SBA - Register your business (SBA).
11. USA.gov - Start your own business (USA.gov).
12. Connecticut Department of Revenue Services - business and tax registration.
13. IRS - Business Structures.
14. IRS - Limited Liability Company (LLC) federal classification.

LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. Laws, fees, and thresholds change; verify current requirements with the Connecticut Secretary of the State and USPTO and the IRS before acting.