A broadening reissue patent lets you go back to the USPTO and widen the claims of a patent you already own, but the window is short and the scrutiny is heavy. Under 35 U.S.C. § 251, you have two years from the original grant date to file, the broader claims must be fully supported by what the original patent already disclosed, and the expansion cannot reach back into subject matter you gave up during the first prosecution. USPTO fees alone come to $3,670 for a large entity before an attorney touches the file.
The Two-Year Filing Deadline
No reissued patent that enlarges the scope of the original claims will be granted unless the application is filed within two years of the original grant date. That deadline sits in § 251(d), it is printed on the face of every patent, and it is not negotiable. Miss it and broadening through reissue is permanently off the table.
The two-year limit applies only to broadening. Narrowing reissues and reissues that correct specification errors can be filed at any point during the patent’s term.
Preserving Broadening Rights Past Two Years
Filing on time does not mean every broadened claim has to be finalized by the deadline. If the initial broadening reissue application is filed within the two-year window, you can later file a continuation or divisional reissue with additional broadened claims, even after two years have passed. The Federal Circuit confirmed this in In re Staats, holding that once a broadening reissue application is timely filed, the applicant is “not barred from making further broadening changes” later, even if those changes are unrelated to the claims in the original reissue filing.
There is a catch. The initial application has to unequivocally show an intent to broaden. Reciting that the patent is “wholly or partly inoperative” is not enough; the filing must specifically identify a claim it seeks to broaden. If you think you may want additional broader claims down the line, build that intent into the first filing.
What Counts as an “Error”
The statute allows reissue when a patent is “through error, deemed wholly or partly inoperative or invalid” because the owner claimed less than they had a right to claim. “Error” has a specific meaning here. It refers to a genuine gap between what the inventor intended to claim and what the granted patent actually covers, without deceptive intent. A patent owner who deliberately picked narrow claims as a prosecution strategy and later changes their mind does not have a correctable error. Reissue is not a second bite at claims you knowingly abandoned.
The disclosure limit is just as firm. Broadened claims must be supported by the written description in the original patent specification. You cannot introduce new matter. If the original patent never described the broader embodiment you now want to claim, reissue will not get you there.
The Recapture Rule
Recapture is where most broadening reissue applications get into trouble. The doctrine blocks patent owners from using reissue to reclaim subject matter they gave up during the original prosecution. If you narrowed claims to get around a prior art rejection the first time, you cannot use reissue to take that territory back. The examiner will read your entire prosecution history looking for the arguments and amendments that surrendered scope.
The USPTO and courts apply a three-step test:
- First, are the reissue claims broader than the original patent claims, and in what specific respect? If they are not broader in any respect, recapture is not an issue.
- Second, does the broadening relate to subject matter that was surrendered during original prosecution? Broadening in a completely different area does not trigger the rule.
- Third, even if the broadening relates to surrendered subject matter, are the claims materially narrowed elsewhere in a way that relates to that same surrendered subject matter? Meaningful narrowing can save the claim; a token narrowing will not.
A recapture rejection is not always fatal. If the broadened claims cover aspects of the invention that were never presented or claimed in the original application, those “overlooked aspects” cannot be subject to recapture, because nothing was surrendered in that area. The other route is to add limitations that materially narrow the reissue claims in a way tied to the surrendered subject matter.
One nuance: a patent owner is bound by arguments made during original prosecution to overcome prior art, whether or not the examiner adopted those arguments. Boilerplate statements that “all limitations distinguish over the prior art” do not count as a surrender that triggers recapture.
Intervening Rights for Third Parties
Broadening your claims can sweep in products and processes that were perfectly legal to make or sell under the original, narrower patent. Section 252 protects the parties who relied on those original boundaries, and this is worth understanding before filing, because your expanded claims will not give you a clean sweep of the newly claimed space.
Absolute intervening rights are automatic. Anyone who made, purchased, offered to sell, or used a product covered by the broadened reissue claims but not by the original claims, before the reissue was granted, can continue using or selling that specific product. The protection covers items already in existence before the reissue date, not new production going forward.
Equitable intervening rights go further and sit in the court’s discretion. A court can allow a third party to keep making, using, or selling products under the broadened claims, or to keep practicing a newly claimed process, if the third party made “substantial preparation” before the reissue was granted. What the court allows depends on what it considers fair given the investments the third party made under the original, narrower patent.
Neither form of intervening rights applies to claims that appeared in both the original patent and the reissue. They matter only for claims that are genuinely new or broader.
Term and Maintenance Fees Do Not Reset
A reissue patent does not get a fresh term. The reissued patent covers only “the unexpired part of the term of the original patent.” Eight years left on the original means eight years on the reissue.
Maintenance fees stay on the original schedule too. They remain due at the 4th, 8th, and 12th year anniversaries of the original grant date, not the reissue grant date. Filing a reissue does not delay or reset those deadlines, and missing a maintenance payment while the reissue is pending can let the original patent lapse and make the whole reissue effort pointless.
What You Have to File
A broadening reissue application includes the entire specification, claims, and drawings from the original patent, along with several documents specific to the reissue process.
The amended claims have to show every change relative to the original patent, with brackets around deleted text and underlining for new text. Every amended claim is presented in full with these markings; you cannot just describe the changes in a cover letter.
The applicant files a sworn reissue declaration stating that the original patent is wholly or partly inoperative or invalid, and identifying at least one specific error that forms the basis for the reissue. For a broadening reissue, the declaration also has to identify the specific claim the application seeks to broaden. Form PTO/AIA/05 is the standardized template. False statements carry penalties under 18 U.S.C. § 1001.
If the patent has been assigned to a company, university, or any other entity, the application must include written consent from all assignees holding an undivided interest, and each consenting assignee has to establish ownership by filing documentation under 37 CFR 3.73. Without that consent, the application is incomplete.
USPTO Filing Fees
Three fees are due at filing: a basic filing fee, a search fee, and an examination fee.
- Large entity: $350 filing + $770 search + $2,550 examination = $3,670
- Small entity: $140 filing + $308 search + $1,020 examination = $1,468
- Micro entity: $70 filing + $154 search + $510 examination = $734
Small entities are generally businesses with fewer than 500 employees, nonprofit organizations, and independent inventors who have not assigned their rights to a larger company. Micro entity status adds more criteria: no inventor can be named on more than four previously filed applications, and neither the applicant nor any inventor can have had gross income exceeding $251,190 in the previous year. Micro entity status cuts filing costs by roughly 80%, so it is worth confirming eligibility before filing.
These figures do not include attorney fees. Patent attorneys handling broadening reissue filings typically charge $150 to $800 per hour depending on market and experience level, and the drafting and prosecution work is substantial.
How Examination Works
After the application is filed through Patent Center, it goes into examination. Reissue applications are examined the same way as original applications. The broadened claims enjoy no presumption of validity and are subject to any rejection the examiner deems appropriate. That is different from the deference courts give issued patents. In a reissue, the examiner starts fresh.
The broadened claims are evaluated against prior art under the same novelty and non-obviousness standards that apply to any patent application. Prior art references the original examiner considered, or missed, can be used again. The examiner also verifies the two-year deadline, checks for recapture problems, and confirms that the broadened claims are supported by the original specification.
If there are problems, the examiner issues an Office Action laying out the legal grounds for rejection. The applicant responds with arguments, claim amendments, or both, and the exchange can go several rounds. Throughout, the original patent stays in force. The surrender only takes effect if and when the reissue actually grants.
One more thing to know: reissue applications are open to public inspection from the moment they are filed, unlike regular patent applications. The USPTO announces the filing in the Official Gazette with the original patent number, inventor, patent owner, and examining group. Competitors and other interested parties can monitor the proceeding and, where appropriate, submit prior art or file protests.