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What is a patent Office Action?

An Office Action is the examiner’s written report on your patent application. What it contains, what it requires, and what happens next.

An Office Action is a written report from the USPTO examiner assigned to your patent application. It states what the examiner searched, which earlier documents they found, which of your claims cannot be allowed and under which sections of the Patent Act, and the period within which you must reply. It is a required step in examination rather than a refusal: most granted US patents received at least one Office Action first. What it demands is a written reply that addresses every ground raised, filed inside the reply period.

Is this a rejection, a warning, or a form letter?

It is a substantive examination report, and the rejections in it are real. It is not a final decision and it is not a form letter.

The most useful way to read it is as a list of objections you have to answer, each with a legal basis stated, plus a date by which the answer must arrive.

What is inside the document

The parts of a typical Office Action
PartWhat it tells you
Cover sheet (form PTOL-326 or 90)Application number, mailing date, examiner, art unit, and the reply period
Status of the claimsWhich claims are rejected, objected to, withdrawn, or allowed
Detailed actionEach ground of rejection, the claims it covers, and the examiner’s reasoning
References cited (form 892)The prior art the examiner is relying on, with numbers and dates
ConclusionWhether the action is final, and the examiner’s contact details

The first three things to do

  1. Find the mailing date

    Every deadline runs from it. Not from receipt, not from the day you opened the envelope or the email.

  2. Check whether it says final

    It changes what you may file, and it introduces a timing rule that can make the printed date misleading.

  3. List the grounds of rejection

    The section numbers in the bold headings. Each ground needs its own answer, and most actions contain several.

Who writes it

The examiner assigned to your application, in a technology art unit

What it requires

A written reply addressing every ground raised

Typical reply period

Three months from the mailing date for an action on the merits

Consequence of silence

Abandonment under 37 C.F.R. 1.135

How common

The large majority of applications receive at least one

Have the PDF? Let us read it

We identify the grounds, the claims, the references and the reply period, with a page citation for each.

Upload my Office Action

Questions people ask

It is normal news. Receiving one says nothing unusual about your application; it is how examination works. What matters is answering it properly and on time.

Commonly one or two before allowance or a final rejection. A first non-final action, a reply, and then either allowance or a final action is the typical shape of prosecution.

Yes. Examiner interviews are a normal and often productive part of prosecution, and the examiner’s telephone number is on the last page of the action. An interview is usually more effective when a practitioner has prepared specific claim language to discuss.

Where this comes from

Every statement of law or procedure on this page traces to a primary source you can check yourself.

If this was not quite your situation

How your Office Action deadline is calculated

The reply period runs from the mailing date. How the three-month and two-month periods work, what extensions buy, and the six-month wall.

The four rejection grounds, told apart

What each section number in an Office Action means: 101 eligibility, 102 anticipation, 103 obviousness and 112 claim drafting.

Responding to a USPTO Office Action

What a response to a USPTO Office Action involves, what it costs, what the deadline is, and how to start with the document you already have.

Non-final and final Office Actions are not the same thing

What changes when an Office Action is final: which amendments can be entered, which routes remain, and how the effective deadline shifts.