Electronic System for Trademark Trials and Appeals

Attention: ESTTA is retiring!

ESTTA is gradually being replaced with a more modern and enhanced electronic system for the Trademark Trial and Appeal Board, known as TTAB Center.

TTAB Center offers a modern user interface with cloud-save applications, sharing tools for practitioners and their clients, and more. Resources are available to answer questions about TTAB Center, including an informational webpage and FAQs.




File Size Limits: The maximum size for each attached file is 6 MB. A single ESTTA filing may comprise more than one attached file, totaling no more than 53 MB.

Please choose one of the following options to start filing a form for

  • Request for Extension of Time to File an Opposition
    File a request for extension of time to file a notice of opposition, relinquish an extension, or other actions related to extensions of time to oppose.
    Fees are required for certain requests for extension that can be filed using this form.
  • File a New Proceeding
    Use these options to file a new opposition, cancellation, or appeal from a final refusal to register or an expungement or reexamination proceeding.

    If you are filing a: Enter the:
    Notice of opposition Application serial no.
    Petition for cancellation Registration no.
    Notice of appeal from final refusal Application serial no.
    Notice of appeal from expungement/reexamination Expungement or reexamination no.


    There is a filing fee associated with these forms.
  • File Documents in a Board Proceeding
    Use these options to file documents (motions, briefs, etc.) in an already existing opposition, cancellation, concurrent use, or appeal proceeding. Choose a filing option and enter the opposition number (91xxxxxx), cancellation number (92xxxxxx), concurrent use number (94xxxxxx), ex parte appeal (xxxxxxxx), or expungement/reexamination number (yyyy-xxxxxxE or yyyy-xxxxxxR) to which your filing applies.

Most filings do not require a fee.
United States Patent and Trademark Office