Patent Term Calculator
Patent maintenance fees are periodic payments required to keep a U.S. utility patent in force after it is granted. These fees are due at 3.5, 7.5, and 11.5 years from the date of patent issuance. Failure to pay within the required timeframe (or the six-month grace period with a surcharge) results in the expiration of the patent. Design and plant patents do not require maintenance payments.
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Enter the requisite information below for exemplary utility patent maintenance filings.
*Date of earliest related non-provisional application. Does not include provisional applications and foreign priority claims.
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Need help maintaining your patent?
Please note that if the first date to pay falls on a weekend then the filing date would move to the next business day.
For Patent No:
The predicted expiration is:
The maintenance fee schedule is:
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*6-month extensions with fee
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Window
3.5 Years
7.5 Years
11.5 Years
First Day to Pay
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Last Day To Pay*
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Please note: Filing dates that fall on weekends will be moved to the next business day.
Need help maintaining your patent?
Disclaimer: The tool provided on this webpage is intended for informational purposes only and does not constitute legal advice or create an attorney-client relationship. While we strive to ensure the accuracy of the information generated by this tool, its use should not be considered a substitute for consulting with a qualified attorney. Users are advised not to rely on the results of this tool to make legally binding decisions, as the circumstances of each legal matter are unique and require individualized analysis. For specific legal advice or assistance, please contact our law firm directly to consult with an experienced attorney. By using this tool, you acknowledge and agree that the law firm shall not be liable for any errors, omissions, or decisions made based on the information provided herein.