An Information Disclosure Statement is how a patent applicant tells the USPTO about prior art and other references that could bear on whether the claims are patentable. The requirements and fees for an Information Disclosure Statement depend on two things: what you are citing and when you file it. Content rules are set by 37 CFR 1.98, timing and fees by 37 CFR 1.97, and a separate cumulative size fee kicks in once your citation count climbs past 50.
What an IDS Must Contain
At a minimum, an IDS must include a list of every item of information submitted for the USPTO’s consideration, with U.S. patents and U.S. patent application publications listed in their own section, separate from all other references.1eCFR. 37 CFR 1.98 – Content of Information Disclosure Statement Most applicants use Form SB/08a, available through Patent Center and the USPTO’s forms page.2United States Patent and Trademark Office. Information Disclosure Statement Form Update
Beyond the listing itself, you must provide a legible copy of each foreign patent, each non-patent publication (or the relevant portion), and any other information that caused it to be listed. Copies of U.S. patents and published U.S. applications are not required unless the USPTO specifically asks — the examiner already has access.1eCFR. 37 CFR 1.98 – Content of Information Disclosure Statement
For any listed reference that is not in English, you must include a concise explanation of its relevance as understood by the person most knowledgeable about the content. That explanation can be a separate document or written into the specification.1eCFR. 37 CFR 1.98 – Content of Information Disclosure Statement A full translation is not required, but the summary needs to give the examiner enough to judge how the foreign-language document affects patentability.
What counts as material, and therefore belongs in the IDS in the first place, is information that is not cumulative to what’s already on the record and either creates a prima facie case of unpatentability or contradicts a position the applicant is taking before the USPTO.3eCFR. 37 CFR 1.56 – Duty to Disclose Information Material to Patentability The disclosure duty runs continuously for every pending claim until that claim is cancelled, withdrawn, or the application is abandoned.4United States Patent and Trademark Office. Manual of Patent Examining Procedure 2001 – Duty of Disclosure, Candor, and Good Faith A reference you find six months into prosecution still has to be submitted.
When to File and What It Costs
The regulations create three timing windows, and the fee and paperwork burden grows with each one. Miss all three and the examiner will place the IDS in the file but refuse to consider it.5eCFR. 37 CFR 1.97 – Filing of Information Disclosure Statement
Early Window: No Fee, No Certification
An IDS filed early is considered automatically at no cost. The window covers whichever of these is latest: within three months of the filing date of a national application, within three months of national stage entry for an international application, before the first Office Action on the merits, or before the first Office Action after a Request for Continued Examination.5eCFR. 37 CFR 1.97 – Filing of Information Disclosure Statement If you have references in hand at filing, submit them then.
Middle Window: Fee or Certification
After the early window closes but before the USPTO mails a final rejection, notice of allowance, or other action closing prosecution, you can still file with either a certification statement under 37 CFR 1.97(e) or the fee under 37 CFR 1.17(p). The certification has to state one of two things: that each item was first cited by a foreign patent office in a counterpart application within the last three months, or that no item was known to anyone with a disclosure duty more than three months before the IDS filing.5eCFR. 37 CFR 1.97 – Filing of Information Disclosure Statement You cannot sign that certification if you have been sitting on the reference for months.
Late Window: Fee and Certification
After a notice of allowance, final rejection, or other prosecution-closing action, filing an IDS requires both the certification and the fee, and the IDS must be filed on or before payment of the issue fee.5eCFR. 37 CFR 1.97 – Filing of Information Disclosure Statement The 37 CFR 1.17(p) fee is $280 for a large entity, $112 for a small entity, and $56 for a micro entity.6United States Patent and Trademark Office. USPTO Fee Schedule
Fees for Large Reference Lists
Applications with many citations trigger a separate cumulative size fee that applies regardless of which timing window you are in. It is based on the total number of items listed across all IDS filings during the life of the application:7eCFR. 37 CFR 1.17 – Patent Application and Reexamination Processing Fees
- More than 50 but no more than 100 items: $200
- More than 100 but no more than 200 items: $500, minus any amount already paid at the first tier
- More than 200 items: $800, minus any amounts already paid at the first or second tier
Because the count is cumulative across the entire pendency, splitting references across multiple IDS filings does not avoid the threshold. In crowded technology areas where counterpart searches turn up hundreds of references, this forces a real conversation about whether every citation is genuinely non-cumulative.
Filing an IDS After the Issue Fee Is Paid
If you miss the late window and the issue fee has already been paid, the examiner will not consider the IDS through normal channels. The traditional fix is a Request for Continued Examination, which reopens prosecution and costs $1,500 for a large entity.6United States Patent and Trademark Office. USPTO Fee Schedule
The Quick Path Information Disclosure Statement program, now permanent, offers a cheaper route in most cases. Under QPIDS, you file the IDS with a timeliness certification, the 37 CFR 1.17(p) fee, a petition to withdraw the application from issue, and a conditionally filed RCE with its fee. The examiner reviews the IDS. If none of the cited references require reopening prosecution, the USPTO issues a corrected notice of allowability, the conditional RCE is never processed, and the RCE fee is refunded. If the references do require further examination, the RCE goes through normally.8United States Patent and Trademark Office. Quick Path Information Disclosure Statement
References You Might Not Realize You Have to Disclose
The disclosure duty reaches well beyond your own prior art search. References cited by a foreign patent office in a counterpart application in Japan, Europe, or elsewhere are almost always material and should be submitted. The same goes for references cited in related U.S. applications, including continuations, divisionals, and co-pending applications in the same technology area.4United States Patent and Trademark Office. Manual of Patent Examining Procedure 2001 – Duty of Disclosure, Candor, and Good Faith
For applications entering the U.S. national stage from a PCT filing, the international search report and written opinion from the International Searching Authority will typically cite references the U.S. examiner should see.9United States Patent and Trademark Office. Manual of Patent Examining Procedure Section 1844 Practitioners managing international portfolios often build tracking systems to ensure foreign office actions get cross-cited within the three-month certification window.
Information that surfaces during litigation counts too. If an expert report, deposition, or discovery document contains technical facts bearing on the patentability of pending claims in a related application, the same test applies: does it establish unpatentability or contradict a position taken before the USPTO?3eCFR. 37 CFR 1.56 – Duty to Disclose Information Material to Patentability
Why the Rules Matter: Inequitable Conduct
Violating the disclosure duty can render the entire issued patent unenforceable, not just the affected claims. This defense, raised in patent litigation, now requires an accused infringer to prove two things by clear and convincing evidence. First, the withheld information must be “but-for” material, meaning the USPTO would not have allowed the claim had it seen the undisclosed reference. Second, the applicant must have acted with specific intent to deceive the USPTO, and that intent must be the single most reasonable inference from the evidence.
Materiality and intent are independent requirements; strong evidence of one no longer compensates for weak evidence of the other. Inequitable conduct findings are harder to obtain than they once were, but when they land, a patent that cost hundreds of thousands of dollars to obtain becomes worthless. A thorough IDS, filed in the early window whenever possible, is cheap insurance against that outcome.