Status code645
Final refusal mailed
Status 645 means the USPTO mailed a final refusal maintaining at least one objection to your application. You can respond, appeal to the Trademark Trial and Appeal Board, or allow the application to abandon.
Updated September 2, 2026 · Reviewed by CopyMark Law Group
- Official USPTO wording
- FINAL REFUSAL — MAILED
- Also recorded as
- 645
- Typical next step
- Evaluate a further response, TTAB appeal, or abandonment with trademark counsel.
- Typical deadline
- Typically three months to respond or appeal, with a possible three-month extension.
What this means
The examiner is standing by the refusal after reviewing your prior response. This is a critical decision point for the application.
What usually happens next
Evaluate a further response, TTAB appeal, or abandonment with trademark counsel.
Typically three months to respond or appeal, with a possible three-month extension.
Related codes
Related CopyMark guides
Frequently asked questions
Can I still register with status 645?
Possibly, through a successful response or appeal. Many applications end here, but final refusal is not always the last word.
Attorney advertising. This page is general educational information and is not legal advice. No attorney-client relationship is formed until an engagement agreement is signed and a conflict check is completed.