Can you renew a patent? No.

Not by paying more, not by refiling, not by petition. A patent runs its term and then the invention is public permanently.

Maintenance fees are not renewal fees, despite the name used in many countries. They keep a patent alive within its term; they add nothing to it.

The confusion is understandable and it costs people money, because it leads owners to defer decisions on the assumption that more time can be bought.

What can and cannot be done

Possible?
Renew or extend the term No
Keep a patent alive within its term Yes — maintenance fees
Recover days lost to USPTO delay Yes — PTA, calculated at grant
Recover time lost to FDA review Yes — PTE, up to 5 years
Revive after a missed fee Sometimes, by petition
Revive after term expiry Never
Refile the same invention No — your own patent is prior art
Patent a genuine improvement Yes — new term, improvement only

Maintenance fees keep, they do not extend

Fee Due after grant Large Small (40%) Micro (20%)
First 3.5 years $2,150 $860 $430
Second 7.5 years $4,040 $1,616 $808
Third 11.5 years $8,280 $3,312 $1,656
Total $14,470 $5,788 $2,894

Paying all three gets you to the twenty-year mark. Nothing beyond it.

Missing one ends the patent early. So the fees are a floor on losing time, not a mechanism for gaining it.

Each has a six-month grace period with a surcharge, after which the patent expires permanently and without notice. See patent maintenance fees.

The two real extension mechanisms

Patent Term Adjustment Patent Term Extension
Compensates for USPTO delay in examination FDA regulatory review
Applies to Any utility patent Regulated products
Calculated At grant, automatically On application
Maximum Days lost, less applicant delay 5 years
Cap — 14 years remaining from approval
Patents per product — One
Deadline — 60 days from FDA approval
Requestable later No No

Neither is available on request when a patent is running out. PTA is computed at grant; PTE must be applied for within sixty days of approval.

Both are corrections for delay, not rewards for value. See patent term extension.

Terminal disclaimers go the other way
Effect Caps the term to an earlier related patent
Filed To overcome double patenting
Reversible No
Common in Families with several related patents

A terminal disclaimer shortens a patent. Where one was filed, the capped date governs regardless of any adjustment earned.

Why refiling does not work

Attempt Result
File the same invention again Rejected — your own patent is prior art
File a continuation Expires with the parent
File a CIP New matter gets a new date; old matter keeps the old one
Patent a genuine improvement New term, covering the improvement only

Continuations add coverage, never term. A continuation filed in 2024 from a 2016 parent expires in 2036.

Improvement patents are the legitimate version of the idea. A real improvement gets its own twenty years covering that improvement, while the original invention still becomes public on schedule.

That is not extension. Competitors are free to practise the original once it expires; they simply cannot use the improvement. See patent family.

Why the confusion is so common

Source of confusion Reality
"Renewal fees" abroad Keep a patent alive; do not extend
Trademarks genuinely renew Indefinitely — patents never
Copyright terms were once extended By legislation, not by owners
Domain names renew Different system entirely
"Maintenance" sounds ongoing It ends at 11.5 years

Trademarks are what people are thinking of. They renew indefinitely so long as the mark is used, which is genuinely perpetual protection on the brand.

Patents were designed to expire. The bargain is disclosure now in exchange for a limited monopoly, and the limit is the point rather than a defect.

Lapse and revival are different from expiry

Lapse for non-payment Term expiry
Cause A missed fee The 20 years ran out
Revivable Sometimes, by petition Never
Basis Delay was unintentional —
Cost Substantial petition fee —
Intervening rights May arise —

Revival is a remedy, not a plan. It is discretionary, it costs a substantial fee, and parties who began practising the invention during the lapse may retain some ability to continue.

Check the dates of any lapse, not just whether one occurred. What you did during that window may be protected.

Worked example: the misconception costing money

An owner assumes the patent can be extended later and defers deciding.

Year Belief Reality
11 "We'll renew when it matters" No renewal exists
11.5 Third fee due, $3,312 Paid, to buy time
14 Considering a sale 6 years left; buyers thin
17 Serious interest appears 3 years left; declined
20 Term ends Public domain, permanently
Fees paid $3,312 at year 11.5
Value realised None
What would have worked Selling at year 11, with 9 years remaining

The deferral was based on a mechanism that does not exist. Believing more time could be bought later removed the urgency from a decision that had a real deadline.

Nine years of remaining term is saleable. Three is not.

Design and plant patents

Utility Design Plant
Term 20 yrs from filing 15 yrs from grant 20 yrs from filing
Maintenance fees Three None None
Anything to renew No Nothing at all Nothing
Reaches full term 41.4% Almost always Almost always

Design patents require nothing after grant, which occasionally causes the opposite error — owners abandoning them in the belief a fee is due.

No fees means no attrition. See how long are design patents good for.

Improvement patents in practice

Original patent Improvement patent
Expires On its own schedule 20 years from its own filing
Covers The original invention The improvement only
After the original expires Public domain Improvement still protected
Competitors may Practise the original freely Not the improvement

This is the legitimate version of extending protection, and it protects something genuinely different.

It requires a real improvement that is itself novel and non-obvious over the original.

Foreign patents use the word "renewal"

US Most other jurisdictions
Name Maintenance fees Renewal fees / annuities
Frequency Three Annual
Payable while pending No Often yes
Extends the term? No No

The word differs; the mechanism does not. Annuities keep a patent alive within its term in every jurisdiction that charges them.

Nowhere lets you buy more term. See patent annuity fees by country.

What the data shows about ending early

Ipiry Patent Survival Curve v1.0 Rate
Survive the 3.5-year fee (2022 cohort) 85.8%
Survive the 7.5-year fee (2018 cohort) 64.6%
Reach full term (2014 cohort) 41.4%
Abandoned before full term 58.6%
Lost at the first fee 14.2%
Lost at the second fee 21.2 points
Lost at the third fee 23.2 points
Conditional: paid first two, pay third 63.0%

Computed from 27,273,654 USPTO maintenance fee records covering 8,262,336 US utility patents — see the patent survival curve.

Most patents do not reach the term you cannot extend. Nearly three in five end at a fee window, by decision.

Which reframes the question. The realistic concern is not how to get more than twenty years; it is whether the patent earns its keep for the years it already has.

The grace period is not an extension
Length 6 months after each fee due date
Cost Surcharge
Effect Keeps the patent alive within its term
Extends the term No
After it closes Permanent expiry, no notice

Using the grace period spends your safety margin. A good practice is paying before it, not during it, so an administrative failure still has room to be caught.

Nothing about the grace period changes the twenty-year end date.

Requests that do not work

Request Outcome
"Can I pay extra for more years?" No mechanism exists
"Can I file a petition to extend?" Only PTA and PTE, both time-limited
"The invention is still commercially important" Irrelevant to term
"Nobody objected" Irrelevant
"I did not know it was expiring" Irrelevant

There is no discretionary extension. Patent term is statutory and the offices have no authority to grant more.

What to do as expiry approaches

Remaining term Action
10+ years Full options — practise, license, sell, enforce
5–7 years Sell while buyers still want it
3–4 years Sale window closing fast
Under 3 years Most buyers decline; license or practise
Final year Prepare for the public domain

Value falls sharply below roughly three years. A patent worth selling at year eight is frequently unsellable at year eleven.

Start any sale twelve months before a fee deadline, since the process takes months. See patent monetization.

Checking your own expiry date

Step Source
1. Earliest non-provisional filing Front page + Related U.S. Application Data
2. Add Patent Term Adjustment Front page
3. Add any Patent Term Extension USPTO records
4. Apply any terminal disclaimer Front page — caps it
5. Confirm fees are current USPTO Patent Center

Step one catches most errors. A continuation runs from the earliest parent, not its own filing date.

Step five is the one that ends patents early. See patent status.

What outlasts a patent

Protection Duration
Trademark on the product name Indefinite with renewal
Trade secret on undisclosed process detail Indefinite while secret
Copyright in manuals and software Long
Design patent on appearance 15 yrs from grant
Brand, distribution, customer relationships Not IP, but durable

Trademarks genuinely renew indefinitely. That is the protection people are usually imagining when they ask about renewing a patent, and it is available on the name rather than the invention.

Trade secret has no expiry either, though filing a patent forecloses it permanently once the application publishes.

Worked example: the last three years

A patent with three years remaining, small entity, third fee due.

Option Cost Outcome
Pay the third fee $3,312 Three more years of a right nobody is infringing
Sell Broker commission Most buyers decline at 3 years
License — No licensee identified
Release $0 Invention public 3 years early
File on a genuine improvement Full filing cost New 20-year term, improvement only
Also worth doing Why
Register the product name Trademark renews indefinitely
Keep process detail unpublished Trade secret survives expiry
Check family members One may have more term

The improvement option is the only route to more protection, and it protects something different.

The trademark is what most owners actually want. Indefinite protection on the thing customers recognise, at a fraction of patent cost.

The one thing that does renew

Patent Trademark
Renewable No Yes, indefinitely
Duration 20 years, fixed Unlimited with use and renewal
Protects The invention The name and brand
Cost per renewal period — Modest
Lost by Expiry Non-use, genericide

Register the product name. It is cheaper than a patent, it renews forever, and it protects the thing customers actually recognise after the invention is public.

Many owners asking about patent renewal want this, and it is available.

Can you renew a patent: the checklist

  1. No. A patent cannot be renewed or extended beyond its term.
  2. Maintenance fees keep, they do not extend. Paying all three reaches twenty years, not beyond.
  3. PTA is calculated at grant, automatically, and cannot be requested later.
  4. PTE requires an application within sixty days of FDA approval.
  5. Refiling the same invention fails. Your own patent is prior art.
  6. Continuations add coverage, never term.
  7. Lapse may be revivable; term expiry never is.
  8. Design patents need nothing — no fees, no renewal, no decisions.
  9. Sell while term remains. Value falls sharply below three years.
  10. Register the trademark. That is the protection that genuinely renews forever.