A USPTO office action is the examiner's written response to your patent application, and it is usually a rejection. Receiving one is normal — most applications get at least one, and two is common.
A note on searching for this. The phrase "office action" is heavily contaminated in general search by box-office and live-action film queries. In patent practice it always means the examiner's communication, and adding "USPTO" or "patent" to any search saves considerable time.
What an office action contains
| Component | What it says |
|---|---|
| Cover sheet | Application number, examiner, art unit, response period |
| Status of claims | Which are rejected, objected to, allowed, or withdrawn |
| Rejections | The statutory basis and the reasoning for each |
| Objections | Formal defects — drawings, specification, claim form |
| Cited references | Prior art relied on, listed on form PTO-892 |
| Examiner's reasons | The substantive explanation |
Rejections and objections are different. A rejection goes to the substance of the claims — they are not patentable as written. An objection goes to form — something is wrong with how the application is presented. Objections are usually easy to fix; rejections require argument or amendment.
Read the cited references before reading the reasoning. The examiner's characterisation of a reference is not always the best reading of it, and forming your own view first is worth the time.
Non-final and final
This distinction governs what you can do in response.
| Non-final office action | Final office action | |
|---|---|---|
| Amendments | Entered as of right | Entered at examiner's discretion |
| New arguments | Freely available | Available |
| New claims | Freely available | Generally not entered |
| Response options | Amend, argue, or both | Response, appeal, RCE, or abandon |
| Typical timing | First action on the merits | Second action, sometimes later |
Final does not mean finished. It means prosecution on the merits is closed for the moment. A Request for Continued Examination reopens it, and appeals are available. Applications routinely receive a final action and go on to allowance.
What makes an action final is generally that the examiner has already considered the claims once and the applicant's amendments did not overcome the rejection, or introduced issues the examiner had already addressed. An examiner cannot make an action final where new grounds of rejection are raised that the applicant has had no opportunity to answer.
After final, the practical options are:
An after-final response under 37 CFR 1.116, which the examiner may or may not enter. Worth attempting where a small amendment plainly overcomes the rejection.
The After Final Consideration Pilot, which gives the examiner limited time to consider an amendment and hold an interview. Cheaper than an RCE and worth trying first where the gap is narrow.
A Request for Continued Examination, which reopens prosecution for a fee.
An appeal to the PTAB, where the rejection is wrong rather than close.
Response deadlines and what extensions cost
Normally three months from the mailing date, extendable to six under 37 CFR 1.136(a) by paying an escalating fee.
| Response filed | Extension fee | Applicant delay charged |
|---|---|---|
| Within 3 months | None | None |
| Month 4 | 1-month fee | ~30 days |
| Month 5 | 2-month fee | ~60 days |
| Month 6 | 3-month fee | ~90 days |
| After 6 months | Not available | Application abandoned |
The extension fee is the smaller cost. Every day beyond three months is charged as applicant delay under 37 CFR 1.704 and reduces Patent Term Adjustment day for day.
A firm that files at the extended deadline as a matter of routine is spending term on convenience. Across a prosecution with three office actions, taking the full extension each time costs roughly nine months of enforceable life — at the end of the patent's term, when the technology is usually most established and the patent most valuable.
The trade is sometimes correct. An extension that buys time to get the response right is better than a rushed response that produces another rejection. The point is that it should be a decision rather than a default.
The rejection types
Section 102: anticipation
A single reference discloses every element of the claim. The examiner must identify where each limitation appears in that one reference.
How to respond. Check whether the reference genuinely discloses every element — anticipation is strict, and a reference missing one limitation does not anticipate. Argue the missing element if there is one. Amend only if there is not.
Also check the date. A reference must qualify as prior art relative to the effective filing date, and dates are occasionally wrong.
Section 103: obviousness
Several references combined, where a skilled person would have had reason to combine them with a reasonable expectation of success. The most common rejection by a wide margin.
How to respond, in order of preference:
Attack the teaching. Do the references actually disclose every element between them? Often one does not disclose what the examiner says it does.
Attack the motivation to combine. After KSR this is harder than it was, but a combination that would not have occurred to a skilled person, or that renders one reference unsuitable for its purpose, is still arguable.
Attack the expectation of success. Particularly effective in unpredictable arts such as chemistry and biology.
Offer secondary considerations. Commercial success, long-felt need, failure of others, unexpected results, copying. A nexus between the evidence and the claimed features must be shown.
Amend last. Every narrowing amendment creates prosecution history estoppel and limits what the doctrine of equivalents can later reach.
Section 112: indefiniteness, enablement, written description
Indefiniteness — a claim term is unclear to a skilled person. Usually fixable by amendment or by pointing to a definition in the specification.
Enablement — the specification does not teach how to make and use the full scope claimed. Harder, because new matter cannot be added.
Written description — the specification does not show possession of the claimed invention. Often arises where claims were broadened during prosecution beyond what was originally described.
Section 101: subject-matter eligibility
The claimed invention is not eligible subject matter — an abstract idea, law of nature or natural phenomenon without significantly more.
Concentrated in software, business methods and diagnostics, and a substantial driver of the pendency figures in patent prosecution. The two-step Alice framework asks whether the claim is directed to an ineligible concept, and if so whether it contains an inventive concept sufficient to transform it.
These are the hardest rejections to overcome by argument alone, and they are a substantial driver of extended pendency in the affected art units.
A worked response strategy
A first non-final office action on a twelve-claim application. Claims 1-8 rejected under 103 over two references; claims 9-12 objected to as depending from a rejected claim but indicated as allowable if rewritten in independent form.
| Step | Action | Reasoning |
|---|---|---|
| 1 | Read both references in full | The examiner's characterisation may be generous |
| 2 | Chart claim 1 against each reference | Establish what is genuinely disclosed |
| 3 | Identify the missing element | Reference A lacks limitation (c) entirely |
| 4 | Request an interview | Test the argument before committing it to the record |
| 5 | Argue non-obviousness on the missing element | No amendment, no estoppel |
| 6 | Hold claims 9-12 in reserve | Rewriting them now abandons broader scope |
| 7 | File within three months | Preserve Patent Term Adjustment |
The instinct to take the indicated-allowable claims immediately is usually wrong. Rewriting claims 9-12 in independent form secures a patent quickly and gives up the broader claim 1 without a fight. If claim 1 is arguable, argue it — the narrower claims remain available afterwards.
The interview is the highest-value step. Fifteen minutes on a call frequently establishes what the examiner would accept, which two more written rounds might not.
Note what step 5 preserves. Arguing without amending avoids amendment-based prosecution history estoppel entirely. If the argument succeeds, the claim issues at its original scope with no surrendered territory.
Examiner interviews
Available before and after a final action, by telephone or video, and frequently the fastest route to allowance.
What they are good for. Establishing what the examiner actually thinks the references teach. Testing whether a proposed amendment would be allowable before committing to it. Resolving misunderstandings that would otherwise take two rounds of correspondence.
What to prepare. A short agenda, the specific claims at issue, and a proposed amendment if you have one. Examiners have limited time and an unfocused interview wastes it.
The substance goes on the record. An interview summary is filed, and statements made become part of the prosecution history — which means they can create argument-based estoppel exactly as written arguments do.
What the response does to your patent later
Everything said during prosecution is public and permanent, and it constrains enforcement years later.
Narrowing amendments create estoppel. Claim scope surrendered to overcome prior art generally cannot be recaptured through the doctrine of equivalents.
Arguments can surrender scope without any amendment. Distinguishing a reference by arguing your invention does not do X tells the public that X is outside the claim.
The discipline is to amend as narrowly as the rejection requires and argue no more broadly than necessary. Both cost time during prosecution. Both preserve options that may matter enormously in litigation.
If you miss the deadline
The application goes abandoned at the end of the response period including extensions.
Revival under 37 CFR 1.137 is available where the entire delay was unintentional, requiring the response, a petition fee and a statement.
It is recoverable but not free. The petition costs money, the abandonment is recorded in the file history, and any Patent Term Adjustment is reduced by the full period of the lapse.
Before you file a response
- Read the cited references yourself before accepting the examiner's characterisation.
- Chart the claims against each reference to find what is genuinely missing.
- Request an interview where the gap looks narrow.
- Argue before amending wherever an argument is available.
- Amend as narrowly as the rejection requires if you must amend.
- File within three months unless there is a specific reason not to — the extension costs term.
- Do not take indicated-allowable dependent claims immediately without deciding whether the broader claim is worth fighting for.
- Record what you argued, because it will be read back to you if the patent is ever asserted.