# MPEP § 2506: Times for Submitting Maintenance Fee Payments > Federal · Agency guidance · In force URL: https://www.frixlaw.com/law-library/statutes/MPEP_S2506 ## Section - **Citation:** MPEP § 2506 - **Heading:** Times for Submitting Maintenance Fee Payments - **Jurisdiction:** Federal - **Kind:** Agency guidance - **Status:** In force - **Text as of:** August 14, 2026 - **Source:** Compiled text - **Location:** USPTO MPEP / Chapter 2500 - Maintenance Fees / MPEP § 2506 ## Text Maintenance fees cannot be paid in advance since 35 U.S.C. 41(f) permits maintenance fees to be adjusted every year on October 1 to reflect any fluctuations during the previous 12 months in the Consumer Price Index as determined by the Secretary of Labor. 37 CFR 1.362(d) sets forth the time periods when the maintenance fees for a utility patent can be paid without surcharge. Those periods, referred to generally as the “window period,” are the 6-month periods preceding each due date. The “due dates” are defined in 35 U.S.C. 41(b) . The window periods are (1) 3 years to 3 1/2 years after the date of issue for the first maintenance fee payment, (2) 7 years to 7 1/2 years after the date of issue for the second maintenance fee payment, and (3) 11 years to 11 1/2 years after the date of issue for the third and final maintenance fee payment. A maintenance fee paid on the last day of a window period can be paid without surcharge. The last day of a window period is the same day of the month the patent was granted 3 years and 6 months, 7 years and 6 months, or 11 years and 6 months after grant of the patent. 37 CFR 1.362(e) sets forth the time periods when the maintenance fees for a utility patent can be paid with surcharge. Those periods, referred to generally as the “grace period,” are the 6-month periods immediately following each due date. The grace periods are (1) 3 1/2 years and through the day of the 4th anniversary of the grant of the patent, (2) 7 1/2 years and through the day of the 8th anniversary of the grant of the patent and, (3) 11 1/2 years and through the day of the 12th anniversary of the grant of the patent. A maintenance fee may be paid with the surcharge on the same date (anniversary date) the patent was granted in the 4th, 8th, or 12th year after grant to prevent the patent from expiring. Maintenance fees for all reissue patents are due based upon the schedule established for the original utility patent nt and, (3) 11 1/2 years and through the day of the 12th anniversary of the grant of the patent. A maintenance fee may be paid with the surcharge on the same date (anniversary date) the patent was granted in the 4th, 8th, or 12th year after grant to prevent the patent from expiring. Maintenance fees for all reissue patents are due based upon the schedule established for the original utility patent. The filing of a request for ex parte or inter partes reexamination and/or the publication of a reexamination certificate does not alter the schedule of maintenance fee payments of the original patent. If the day for paying a maintenance fee falls on a Saturday, Sunday, or a federal holiday within the District of Columbia, the maintenance fee may be paid on the next succeeding day that is not a Saturday, Sunday, or federal holiday. For example, if the window period for paying a maintenance fee without a surcharge ended on a Saturday, Sunday, or a federal holiday within the District of Columbia, the maintenance fee can be paid without surcharge on the next succeeding day that is not a Saturday, Sunday, or a federal holiday within the District of Columbia. Likewise, if the grace period for paying a maintenance fee with a surcharge ended on a Saturday, Sunday, or a federal holiday within the District of Columbia, the maintenance fee can be paid with surcharge on the next succeeding day that is not a Saturday, Sunday, or a federal holiday within the District of Columbia. In the latter situation, the failure to pay the maintenance fee and surcharge on the next succeeding day that is not a Saturday, Sunday, or a federal holiday within the District of Columbia will result in the patent expiring on a date (4, 8, or 12 years after the date of grant) earlier than the last date on which the maintenance fee and surcharge could be paid. This situation results from the provisions of 35 U.S.C ation, the failure to pay the maintenance fee and surcharge on the next succeeding day that is not a Saturday, Sunday, or a federal holiday within the District of Columbia will result in the patent expiring on a date (4, 8, or 12 years after the date of grant) earlier than the last date on which the maintenance fee and surcharge could be paid. This situation results from the provisions of 35 U.S.C. 21 , but those provisions do not extend the expiration date of the patent if the maintenance fee and any required surcharge are not paid when required. For example, if the grace period for paying a maintenance fee with a surcharge ended on a Saturday, the maintenance fee and surcharge could be paid on the next succeeding business day, e.g., Monday, but the patent will have expired after midnight on Saturday (e.g., on Sunday) if the maintenance fee and surcharge were not paid on the following Monday. Therefore, if the maintenance fee and any applicable surcharge are not paid, the patent will expire as of the end of the grace period as listed above. A patent that expires for failure of payment will expire on the day following the anniversary date the patent was granted in the 4th, 8th, or 12th year after the grant. [top] ## Nearby sections - [MPEP § 2501 Introduction](https://www.frixlaw.com/law-library/statutes/MPEP_S2501.md) - [MPEP § 2504 Patents Subject to Maintenance Fees](https://www.frixlaw.com/law-library/statutes/MPEP_S2504.md) - [MPEP § 2505 [Reserved]](https://www.frixlaw.com/law-library/statutes/MPEP_S2505.md) - [MPEP § 2506 Times for Submitting Maintenance Fee Payments](https://www.frixlaw.com/law-library/statutes/MPEP_S2506.md) - [MPEP § 2510 Submission of Maintenance Fee Payments and Documents](https://www.frixlaw.com/law-library/statutes/MPEP_S2510.md) - [MPEP § 2515 Information Required for Submission of Maintenance Fee Payment](https://www.frixlaw.com/law-library/statutes/MPEP_S2515.md) - [MPEP § 2520 Maintenance Fee Amounts](https://www.frixlaw.com/law-library/statutes/MPEP_S2520.md) - [MPEP § 2521 [Reserved]](https://www.frixlaw.com/law-library/statutes/MPEP_S2521.md) - [MPEP § 2522 Methods of Payment](https://www.frixlaw.com/law-library/statutes/MPEP_S2522.md) - [MPEP § 2530 Special Acceptance of Maintenance Fee Payments Containing Informalities](https://www.frixlaw.com/law-library/statutes/MPEP_S2530.md) - [MPEP § 2531 Payment Late or Insufficient](https://www.frixlaw.com/law-library/statutes/MPEP_S2531.md) - [MPEP § 2532 Duplicate Payments](https://www.frixlaw.com/law-library/statutes/MPEP_S2532.md) - [MPEP § 2540 Fee Address for Maintenance Fee Purposes](https://www.frixlaw.com/law-library/statutes/MPEP_S2540.md) - [MPEP § 2541 [Reserved]](https://www.frixlaw.com/law-library/statutes/MPEP_S2541.md) --- Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/MPEP_S2506. Check the current official text before relying on it. Not legal advice.