A reply to a non-final Office action under 37 CFR 1.111 must address every ground of rejection and objection the examiner raised, do so distinctly and specifically, and be filed within the deadline set in the Office action. Anything less risks the application being treated as abandoned. The rule is short, but it drives almost every strategic choice in patent prosecution: what to argue, what to amend, and how to package the response so the examiner will actually consider it.
What the Reply Must Contain
Two things. First, your reply has to point out what you believe the examiner got wrong. Second, it has to respond to every ground of objection or rejection in the Office action. The regulation uses the words “distinctly and specifically,” and those words do real work. A blanket assertion that the claims are patentable is not a reply. Neither is a paragraph of boilerplate that lumps several rejections together.1eCFR. 37 CFR 1.111 – Reply by Applicant or Patent Owner to a Non-Final Office Action
If the examiner rejected five claims on different grounds, each rejection needs its own treatment. Where the rejection relies on prior art, your arguments have to identify the specific claim language that distinguishes your invention from the reference. Saying the invention is “different” without pointing to the words in the claim that make it different gives the examiner nothing to act on. This is where most replies succeed or fail.1eCFR. 37 CFR 1.111 – Reply by Applicant or Patent Owner to a Non-Final Office Action
The reply also has to be a “bona fide” attempt to advance the case toward final action. That standard matters because it decides what happens when a reply is imperfect.
When a Reply Is Treated as Non-Responsive
If the USPTO determines your reply is not a proper response, the application goes abandoned under 37 CFR 1.135.2eCFR. 37 CFR 1.135 – Abandonment for Failure to Reply Within Time Period
There is a narrow safety net. If your reply was a genuine attempt to move the case forward and was substantially complete but inadvertently left out a single requirement or missed one minor objection, the examiner may set a new time period to fix the omission rather than declaring the application abandoned. This bona fide attempt exception is only available on non-final actions, and it does not cover a reply that made no real effort to engage with the rejections.2eCFR. 37 CFR 1.135 – Abandonment for Failure to Reply Within Time Period
Amendments: How to Format Changes
Most replies include amendments. The detailed formatting rules sit in 37 CFR 1.121, and examiners enforce them strictly because consistent formatting is how they see what changed.
Claim Status Identifiers
Every amendment must include a complete listing of all claims ever presented, and each claim needs a parenthetical status identifier after its number. The permitted labels are (Original), (Currently amended), (Canceled), (Withdrawn), (Previously presented), (New), and (Not entered). If the application has 20 claims and you are only amending claim 1, all 20 still appear in the listing with their labels.3eCFR. 37 CFR 1.121 – Manner of Making Amendments in Applications
Marking Additions and Deletions
Only “Currently amended” claims carry text markings. Underline text you are adding. Use strikethrough for text you are deleting. Deletions of five or fewer characters may use double brackets instead, and double brackets are also acceptable when strikethrough does not render clearly. The same marking convention applies in the specification: a replacement paragraph is submitted in full with additions underlined and deletions struck through or bracketed. A brand-new paragraph needs no underlining because everything in it is new.3eCFR. 37 CFR 1.121 – Manner of Making Amendments in Applications
The New Matter Limit
You cannot add information to the application that was not in your original disclosure. That prohibition comes from 35 U.S.C. 132, and it is one of the most common traps when applicants try to overcome a rejection by narrowing a claim. If you add a limitation to distinguish your claim from the prior art, the original specification has to support that exact limitation. Before adding language, confirm the concept is already in the specification as filed. A new matter rejection can undo the ground you gained.4Office of the Law Revision Counsel. 35 US Code 132 – Notice of Rejection; Reexamination
How Long You Have to Reply
The Office action itself states the deadline. Under 37 CFR 1.134, the statutory maximum is six months from the mailing date, but examiners almost always set a shortened period, typically three months.5eCFR. 37 CFR 1.134 – Time Period for Reply to an Office Action
Buying Extra Time
If three months is not enough, 37 CFR 1.136(a) lets you buy more time by filing a petition for extension with a fee. On non-final actions the extensions are essentially automatic: pay the fee, and the time is granted. No explanation is required. Large-entity fees climb steeply by month:6eCFR. 37 CFR 1.136 – Extensions of Time
- First month: $235
- Second month: $690
- Third month: $1,590
- Fourth month: $2,495
- Fifth month: $3,395
Small entities pay 40% of these amounts and micro entities pay 20%. A first-month extension is $94 for a small entity and $47 for a micro entity.7United States Patent and Trademark Office. USPTO Fee Schedule
You can also file a blanket authorization in the application that automatically treats any future reply needing extra time as including the extension petition. That single step has saved many applications from accidental abandonment.6eCFR. 37 CFR 1.136 – Extensions of Time
The Six-Month Ceiling
No extension can push a reply past six months from the Office action’s mailing date. That ceiling is statutory. Miss it and the application is abandoned. If the last day falls on a Saturday, Sunday, or federal holiday in the District of Columbia, you can file on the next business day.8Office of the Law Revision Counsel. 35 US Code 21 – Filing Date and Day for Taking Action
Signing the Reply
Every reply must be signed. For electronic filings, the standard is an S-signature: the signer’s name between forward slashes, like /Jane Smith/. The person named must personally type or insert the S-signature. A paralegal or assistant cannot insert it for you. The signer’s printed name appears next to the S-signature. If a registered patent practitioner is signing, the registration number goes inside the slashes or immediately next to them, for example /Jane Smith Reg. #12345/. The USPTO recommends using your full legal name for consistency.9United States Patent and Trademark Office. Signatures 37 CFR 1.4
Filing the Response
Patent Center is the USPTO’s primary electronic filing system. Upload your response as PDFs, confirm the submission, and save the Electronic Acknowledgement Receipt. That receipt, with its timestamp and confirmation number, is your proof of timely filing.10United States Patent and Trademark Office. File Online
If you file by mail, include a certificate of mailing under 37 CFR 1.8 stating the date you deposited the response with the U.S. Postal Service as first-class mail. The USPTO treats the deposit date as your filing date. Priority Mail Express provides its own dated proof. Certain documents can go by fax to the USPTO Central Facsimile at (571) 273-8300, but fax cannot be used for new applications, national stage entries, or documents needed to establish a filing date. Patent correspondence cannot be submitted by email.11eCFR. 37 CFR 1.8 – Certificate of Mailing or Transmission12United States Patent and Trademark Office. Filing Documents During an Outage
Examiner Interviews Alongside the Written Reply
Under 37 CFR 1.133, you can request a meeting with the examiner to discuss patentability before or alongside filing your written response. Interviews become available after the first Office action and can be conducted in person, by phone, or by video. They typically run about 30 minutes, and the USPTO encourages sending an agenda or proposed amendment in advance.13eCFR. 37 CFR 1.133 – Interviews14United States Patent and Trademark Office. MPEP 713 – Interviews
An interview does not replace the 1.111 written reply. You still have to file a response addressing every rejection, and you also have to file a written summary of what was discussed. Used well, an interview clarifies the examiner’s real concerns and lets you write a more targeted response.13eCFR. 37 CFR 1.133 – Interviews
Supplemental Replies After You File
Once your reply is on file, you do not have an automatic right to file a second one on the same Office action. The USPTO may accept a supplemental reply, but only within narrow categories: canceling claims, adopting the examiner’s suggestions, putting the case in condition for allowance, responding to a new Office requirement issued after your first reply, correcting informalities such as typographical errors, or simplifying the issues for appeal. New arguments or substantial claim rewrites in a supplemental reply will typically be refused entry. Get the first reply right.15eCFR. 37 CFR 1.111 – Reply by Applicant or Patent Owner to a Non-Final Office Action
If the Reply Does Not Persuade the Examiner
If your arguments and amendments do not convince the examiner, the next Office action is usually a final rejection. Under 37 CFR 1.116, you can still file amendments after final, but the examiner only has to enter them if they place the case in condition for allowance or are narrow enough to consider without a new search. Broad post-final amendments are routinely refused entry.
The more flexible path is a Request for Continued Examination under 37 CFR 1.114. Filing an RCE with a new submission and the required fee reopens prosecution. The finality is withdrawn, and your amendments and arguments are considered as if prosecution had not closed. The first RCE fee is $1,500 for a large entity, $600 for a small entity, and $300 for a micro entity; second and later RCEs cost $2,860, $1,144, and $572 respectively. The RCE submission has to meet the same completeness standards as a 1.111 reply if an Office action is outstanding.16eCFR. 37 CFR 1.114 – Request for Continued Examination17United States Patent and Trademark Office. USPTO Fee Schedule
The other option is an appeal to the Patent Trial and Appeal Board, generally the better fit when you believe the examiner’s legal reasoning is wrong rather than when you need to restructure the claims.