Trademark Due Diligence: Owner, TTAB & Renewal Checks

Intellectual Property · Updated August 2026

A brand is often a company's most recognizable asset, and the trademark registration is the legal spine of that brand. Trademark due diligence checks that the registration is valid, that the target actually owns it, and that it is not about to lapse or under attack — questions that a logo on a pitch deck never answers.

Confirm the owner of record

Start with the USPTO record for each registration and application. The registrant listed there is the legal owner, and it should match the deal party. Trademarks move by assignment just as patents do, and the assignment record frequently lags reality: a mark still registered to a founder, a predecessor entity, or an acquired company that was never formally merged is a title defect the buyer will inherit. Reconcile every mismatch before relying on the mark.

Trace the chain of title where the current owner is not the original applicant. An unbroken chain from applicant to today's registrant is what lets the seller convey clean title.

Live or dead — and on what basis

A registration's status in the USPTO system is the first health check. "Live" is necessary but not sufficient: look at whether the mark is registered on the Principal Register (the strong position) or the Supplemental Register, and whether registration was based on actual use or an intent-to-use application that may not have matured. A mark registered but never genuinely used in commerce is vulnerable to cancellation for non-use or abandonment.

Renewal and maintenance deadlines

Trademarks last indefinitely but only if maintained. U.S. registrations require a Section 8 declaration of continuing use between the fifth and sixth years, and a combined Section 8 and Section 9 renewal every ten years. Miss a window and the registration is cancelled. Check the next maintenance deadline for every mark that matters; a portfolio with declarations coming due is a cost and a risk the buyer takes on, and a mark already cancelled for a missed filing is a finding that should surface before closing.

TTAB: oppositions and cancellations

The Trademark Trial and Appeal Board (TTAB) is where third parties contest marks. An opposition can block an application from registering; a cancellation petition attacks a registration already granted, often on grounds of non-use, abandonment, or likelihood of confusion. A mark tied up in a TTAB proceeding is contested property, and the outcome can strip the registration entirely. Check whether any mark in the portfolio has a pending or decided TTAB matter, and read what it was about.

Scope: classes and goods

Registration protects a mark for specific goods and services in specific classes, not for everything. A company that sells software but registered its mark only for apparel has a gap between its brand use and its legal protection. Confirm the classes and the identified goods and services line up with what the business actually does, and note where the brand has outgrown its filings.

Verify a trademark portfolio. OpenDD's Trademark Due Diligence module checks the current owner, chain of title, live/dead status, Section 8/9 renewal deadlines and TTAB proceedings from USPTO data — enter serial or registration numbers, or start from the owner. Run a trademark check →

Registration is not the whole story

A clean registration proves the paper is in order; it does not prove the mark is being used consistently, policed against infringers, or free of common-law conflicts from unregistered users. Use the USPTO record to establish ownership, status, deadlines and disputes — the questions that most often derail a brand deal — then verify use and enforcement separately. This is general information, not legal advice.