What are Patent Maintenance Fees?
The three US payment windows, the grace period and surcharge, annuities abroad, and how teams decide which patents are worth another fee.
Definition
Maintenance fees are the periodic payments a patent owner must make to keep a granted patent in force. In the US they are due 3.5, 7.5, and 11.5 years after the grant date; most other countries charge annual renewal fees, called annuities, from the application stage onward.
Key Facts
- US due dates: 3.5, 7.5, and 11.5 years after the issue date, under 35 U.S.C. § 41(b)
- Payment window: Opens 6 months before each due date, so at 3.0, 7.0, and 11.0 years
- Grace period: 6 months after the due date, with a late surcharge added
- Amounts: Each fee is larger than the last; the 11.5-year fee is roughly four times the 3.5-year fee for a large entity, with 60% and 80% discounts for small and micro entities
- Design and plant patents: No maintenance fees
- Missed grace period: The patent expires and can only be reinstated by petition for unintentional delay
How the Windows Work
Each fee can be paid without surcharge during the six months before the due date. If it is unpaid on the due date, the patent remains in force during a six-month grace period, but the surcharge applies. If the grace period also passes, the patent expires retroactively as of the due date.
A patent that expired for non-payment can be reinstated by petition under 37 C.F.R. § 1.378 if the delay was unintentional. There is no longer a time limit on the petition, but intervening rights protect anyone who began using the invention while the patent was expired.
Annuities Outside the US
Most patent offices charge a renewal fee every year, often starting from the third year after filing even while the application is still pending. The European Patent Office collects annuities during examination; after grant, each validated national patent has its own annuity schedule. A single patent family with ten jurisdictions can therefore carry more than one hundred separate deadlines over its life, which is why most teams use an annuity service or docketing system.
The Decision Behind Every Fee
Maintenance fees are the largest recurring line item in most patent budgets, and the escalating schedule is deliberate: it is designed to push owners to abandon patents that no longer earn their keep. A disciplined patent pruning review before each window asks:
- Does any claim still read on a product we sell or a competitor sells?
- Does the patent support a license, a standard, or a cross-license?
- Is the remaining term long enough to matter?
- Are there siblings in the family that cover the same ground?
ArcPrime's patent pruning workflow scores every patent approaching a fee window against those questions so the renewal list is a decision, not a default.
Frequently Asked Questions
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When are US patent maintenance fees due?
At 3.5, 7.5, and 11.5 years after the patent issue date. Each can be paid without surcharge during the six months before it is due, and with a surcharge during the six months after.
What happens if you miss a maintenance fee?
The patent stays in force for a six-month grace period if the fee and surcharge are paid. After that it expires as of the original due date. It can be reinstated by petition if the delay was unintentional, but third parties who relied on the expiration gain intervening rights.
Do design patents have maintenance fees?
No. US design patents and plant patents have no maintenance fees. They stay in force for their full term, 15 years from grant for designs filed after May 2015, once issued.
Are maintenance fees the same as annuities?
They serve the same purpose but differ in schedule. US maintenance fees are paid three times over the patent life, after grant only. Annuities in most other countries are paid every year, often starting while the application is still pending.
Do small and micro entities pay reduced maintenance fees?
Yes. Small entities receive a 60% discount and micro entities an 80% discount on maintenance fees, the same reductions that apply to most other USPTO fees. Status must be accurate at the time of each payment.
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