How long do I have to respond to a non-final office action?

Three months from the mailing date printed on the action, as the shortened statutory period. You can buy one, two or three additional months by paying an extension fee with the response — no advance request is needed — for a total of six months. The sixth month is the statutory limit under 35 U.S.C. §133; nothing extends it. If the deadline falls on a weekend or federal holiday, the response is timely on the next business day.

What is the two-month rule after a final office action?

If you file a reply to a final rejection within two months of its mailing date and the examiner's advisory action issues after the original three-month period would have ended, the period for taking further action — and the extension fees — is measured from the advisory action's date instead of the final action's. The six-month statutory limit still runs from the final action. In practice, filing an after-final response inside two months buys you time to file an RCE or a notice of appeal without paying for the months the examiner spent considering it.

What happens if I miss the deadline?

The application is abandoned as of the day after the period expired. It can be revived by petition under 37 CFR 1.137 if the entire delay was unintentional, with the petition fee and the outstanding reply. Revival is routine for short delays and increasingly scrutinised for long ones — the Office may ask for an explanation when the delay exceeds two years. A deliberate decision to let it lapse cannot be cured.

Can I get more than six months?

No. The six-month period is set by statute and the Office has no authority to extend it. The only way to keep prosecuting past it is to have filed something within it — a reply, a request for continued examination, a notice of appeal, or a continuing application — that keeps the application alive.

How long do I have to pay the issue fee?

Three months from the mailing date of the notice of allowance, and this period is not extendable. Missing it abandons the application; revival is available on the same unintentional-delay petition, but the safer course is to docket it the day the notice arrives.

Guides

Office action deadlines: three months, six with extensions, and the after-final two-month rule

Michael W. Smith, former USPTO patent examiner · September 13, 2026

A non-final or final office action from the USPTO sets a shortened period of three months to respond, measured from the action's mailing date. That period can be extended month by month, for a fee that rises each month, up to the statutory maximum of six months — beyond which no extension is possible and the application goes abandoned. Restriction requirements and Ex parte Quayle actions usually set two months, also extendable to six. After a final rejection, a reply filed within two months keeps the extension clock from running against you while the examiner considers it. The issue fee is due three months from the notice of allowance and cannot be extended.

The periods, by action type

Action	Shortened period	Extendable to	Notes
Non-final office action	3 months	6 months	Extension fees escalate month by month; paid with the response.
Final office action	3 months	6 months	The after-final two-month rule applies to the extension clock.
Restriction / election requirement	2 months (typically)	6 months	A written election is required; the period is stated on the action.
Ex parte Quayle action	2 months	6 months	Only formal matters remain; substantive prosecution is closed.
Notice of allowance — issue fee	3 months	Not extendable	Missing it abandons the application.
Notice of appeal	within the reply period of the final action	6 months from the final	The appeal brief is due 2 months from the notice of appeal, extendable.
Notice to file missing parts	2 months	6 months	Pre-examination; extensions available.

All periods run from the mailing date on the action (the notification date, for electronic delivery), not the date you read it. Every period that can be extended is capped by the six-month statutory limit of 35 U.S.C. §133 measured from the same date.

Extensions of time

Extensions under 37 CFR 1.136(a) are automatic: you do not ask in advance, you file the response with the extension fee for the number of months you used, and the response is treated as timely. The fee rises steeply with each month and is set by the current fee schedule, with small- and micro-entity discounts. A response filed in the fifth month with the fee for a two-month extension is a late response — the fee has to match the month the response actually arrives.

Because the fee escalates, the economics of waiting are simple: a response in month three costs nothing extra, a response in month six costs the most, and the substantive work is the same. What the extra months buy is time to read the references properly, to search before amending, and to hold an examiner interview — each of which tends to shorten prosecution by a round. Time bought for that is well spent. Time bought for a response that was going to be written the same way in month three is not.

After a final rejection

A final rejection closes prosecution on the merits: the examiner is no longer required to enter an amendment that raises new issues or needs a new search. Your options within the period are an after-final reply (arguments, or amendments that cancel claims, adopt examiner suggestions, or put the case in better form for appeal), a request for continued examination, which reopens prosecution with a fee, or a notice of appeal to the Patent Trial and Appeal Board.

The two-month rule is the piece prosecutors most often lose track of. File the after-final reply within two months of the final's mailing date, and if the advisory action comes back after the third month, the extension fees for an RCE or notice of appeal are calculated from the advisory action date rather than the final's — while the absolute six-month deadline still runs from the final. Filing at month two rather than month three can save a month or two of extension fees and, more importantly, keeps the appeal window open long enough to decide on it properly.

The After Final Consideration Pilot (AFCP 2.0), which let examiners spend extra time on after-final amendments at no fee, ended in December 2024. After-final practice is now the ordinary rule: an amendment needing more than a cursory review is not entered, and the path forward is an RCE or an appeal.

Docketing rules that prevent abandonments

Docket from the mailing date, never from receipt. The three-month and six-month dates are fixed the day the action issues.
Docket the six-month date as the real deadline and the three-month date as the free one. An abandonment happens at six months, and it is the date that matters when everything else slips.
Treat the issue fee as non-extendable, because it is. It is the one period on this list that no fee can rescue.
Weekends and federal holidays roll the deadline to the next business day. Do not plan on it.
Check for a period other than three months. Restriction requirements, Quayle actions and notices to file missing parts set two; some actions set one. The period is printed on the action's first page.

Where this connects to the search

The reason to know the calendar precisely is that the best responses take time the calendar has to accommodate: reading every cited reference at the pinpoint, checking whether it is prior art at all, and searching the examiner's field before choosing an amendment. All of that fits inside three months when it starts on day one. Started in the fifth month, the response is written around whatever is quickest, which is how a §102 becomes a §103 becomes an RCE. Guides on reading the rejection itself: §102 and §103.