Electronic System for Trademark Trials and Appeals


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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. Choose your filing and enter the serial number of the application to be opposed, the registration number of the registration to be cancelled, or the serial number of the application to be appealed.

    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), or application serial number to which your filing applies.

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