Candor Without Capitulation: The Philosophical Case for Filing an Information Disclosure Statement

Every patent prosecutor has heard some version of the same question: Why should an applicant disclose a reference that might be used to reject the application?

The question is understandable. Counsel is retained to advance the client’s interests, and an information disclosure statement, or IDS, may place potentially adverse information before the examiner. But patent examination is not ordinary adversarial litigation. It is an ex parte administrative proceeding in which the applicant seeks a government-conferred right enforceable against members of the public who ordinarily have no opportunity to participate.

An IDS is therefore best understood as a patent-specific, ex parte analogue to discovery: a disclosure-by-rule mechanism that partially substitutes for the absent adversary. The analogy is functional rather than literal. An IDS does not involve reciprocal requests, objections, privilege logs, protective orders, judicial enforcement, or the full scope of civil discovery. It addresses the narrower problem created when persons seeking a public right possess information material to the government’s decision and no opposing party is present to request it.

A patent that results from informed examination is more defensible than one obtained by exploiting the informational weakness of an ex parte process. That is the moral center of the disclosure requirement.

Just as important, filing an IDS is not a concession. Under 37 C.F.R. § 1.97(g)–(h), an IDS is neither a representation that the filer conducted a search nor an admission that the cited information is material to patentability. The applicant can submit a reference and then explain why it does not anticipate the claims, render them obvious, or otherwise affect patentability.

I.             The Public Character of Patent Examination

Rule 56 begins with a statement about the nature of the patent right: “A patent by its very nature is affected with a public interest.” The rule explains that effective examination occurs when the U.S. Patent and Trademark Office is aware of and evaluates all information material to patentability. It therefore imposes a duty of candor and good faith that includes disclosure of known material information concerning pending claims. 37 C.F.R. § 1.56(a).

Although practitioners often refer loosely to “the applicant’s duty,” the regulation is more exact. The duty applies to each individual associated with filing or prosecution: every named inventor; every attorney or agent who prepares or prosecutes the application; and every other person substantively involved in preparation or prosecution who is associated with the inventor, applicant, assignee, or a person to whom there is an obligation to assign. Id. § 1.56(c). The duty applies to those individuals, not to a corporation as an abstract entity. MPEP § 2001.01. This article uses “the applicant” as shorthand for persons covered by the rule.

Strictly speaking, Rule 56 establishes the disclosure obligation, while 37 C.F.R. §§ 1.97 and 1.98 provide the ordinary procedural vehicle for satisfying it through an IDS. The distinction is useful because the philosophical basis lies in the duty to place material information before the Office, not in the form itself.

That duty follows from the patent bargain. The patent laws offer an inventor a limited right to exclude in return for disclosure of the invention. The Supreme Court has described disclosure as the quid pro quo for that right. Kewanee Oil Co. v. Bicron Corp., 416 U.S. 470, 480–84 (1974).

The specification and the IDS serve different parts of that bargain. The disclosure required by 35 U.S.C. § 112 teaches the public what the invention is and how to make and use it. The IDS helps the Office determine whether the applicant is entitled to the claimed exclusionary scope in view of what was already known or otherwise bears on patentability.

The IDS is not itself the statutory quid pro quo. It helps the Office police the boundaries of the exchange. The specification describes what the applicant claims to have contributed; the IDS supplies known material information relevant to whether the requested claims extend into subject matter that should remain available to the public.

II.          A Qualified Analogy to Civil Discovery

American civil litigation does not generally assume that adjudication is improved when each party may preserve every informational advantage until trial. Federal Rule of Civil Procedure 26 requires specified disclosures without awaiting a discovery request, permits discovery of nonprivileged matter relevant to a claim or defense and proportional to the needs of the case, and requires timely correction of materially incomplete or inaccurate disclosures and responses. Fed. R. Civ. P. 26(a)(1), (b)(1), (e)(1).

The IDS combines only some of those features. Like mandatory disclosure and supplementation under Rule 26, the Rule 56 obligation is self-executing; a person covered by the rule need not wait for the examiner to ask. But an IDS may include information adverse to the applicant’s patentability position, making its substantive reach more analogous to party-initiated discovery than to Rule 26(a)(1), which principally identifies information a litigant may use to support its own claims or defenses.

The scope is also different. Civil discovery broadly reaches relevant, proportional, nonprivileged information. Rule 56 addresses known information that is noncumulative and material to the patentability of a pending claim. 37 C.F.R. § 1.56(a)–(b). It does not create a general duty to investigate, and Rule 1.97(g) confirms that filing an IDS does not represent that a search was performed.

Patent practice also contains a mechanism that more closely resembles an actual discovery request. Under 37 C.F.R. § 1.105, an examiner may require information reasonably necessary to examine or treat a matter in an application. The USPTO accordingly distinguishes the applicant’s duty to disclose material information on its own initiative under Rule 56 from an examiner’s targeted requirement for information under Rule 1.105. MPEP § 2005.

The discovery analogy nevertheless identifies the institutional problem. During ordinary examination, no competitor is present to serve interrogatories, request documents, retain an expert, or challenge the applicant’s account of the pertinent art. The examiner conducts an independent search, but the examiner may not know what individuals involved in prosecution know about foreign search results, related applications, inventor activities, prior uses, sales, or inconsistent positions taken in other proceedings.

The absent public cannot serve document requests. Rule 56 partially fills that gap.

The examiner’s search and the applicant’s duty are complementary. In litigation, a party ordinarily cannot resist proper discovery simply because the requesting party could conceivably find the information elsewhere. In patent examination, the possibility that an examiner might independently locate a reference does not eliminate the obligation of a covered individual who already knows that the information is material.

III.      What Brady and Precision Instrument Add

A moral analogy from Brady

Brady v. Maryland offers a qualified moral analogy. The Supreme Court held that suppression of requested evidence favorable to an accused violates due process when the evidence is material to guilt or punishment, regardless of the prosecutor’s good or bad faith. The Court emphasized that the purpose of the rule was to prevent an unfair proceeding, not merely to punish prosecutorial misconduct. Brady v. Maryland, 373 U.S. 83, 87–88 (1963).

The differences from patent prosecution are fundamental. A prosecutor represents the sovereign and exercises governmental power against an individual. Patent counsel represents a private party seeking a government-conferred right. A patent examiner is not a criminal defendant, and the interests at stake are not equivalent. Neither Brady’s constitutional doctrine nor its materiality standard applies to an IDS.

The analogy is instead about the proper conception of advocacy in a public proceeding. Brady rejects the idea that the government’s interest is fully served whenever the prosecution obtains its preferred outcome. The fairness of the process matters independently. Patent prosecution reflects a related institutional judgment: an advocate may have to disclose information adverse to the advocate’s immediate position when an informed governmental decision depends on it.

The applicant may still argue after disclosure. A cited reference may be cumulative, nonanalogous, nonenabling, or deficient as to one or more claim limitations. Submission gives the Office the opportunity to evaluate the information; it does not dictate the conclusion the applicant must advocate.

The patent-law foundation in Precision Instrument

The more direct patent-law foundation appears in Precision Instrument Manufacturing Co. v. Automotive Maintenance Machinery Co., 324 U.S. 806 (1945). The case involved perjury in Patent Office interference proceedings, knowing suppression of evidence concerning that perjury, acquisition of a tainted application, and an attempt to enforce the resulting patent. The Supreme Court applied the clean-hands doctrine and emphasized that patent enforcement concerns more than the private interests of the litigants because patents carry substantial social and economic consequences. Id. at 814–18.

The Court also reasoned that the relevant facts should have been presented to the Patent Office so the agency could assess their sufficiency. Id. at 818. That reasoning supports an important allocation of authority. The information-holder does not have exclusive power to determine that potentially significant information is too weak or uncertain for the Office to consider.

The limiting principle is essential. Precision Instrument involved extraordinary fraud-related conduct, not an ordinary failure to cite a prior-art reference. Its duty-to-report discussion arose from suspected perjury and deliberate suppression of evidence concerning possible fraud or inequity. The decision should not be read to equate every mistaken omission, close materiality judgment, or administrative error with the misconduct before the Court.

Its broader public-interest reasoning remains useful. When information falls within the applicable disclosure standard, the responsible individuals submit it and allow the examiner to determine its patentability consequences. Counsel may have a strong and ultimately correct view that the information does not defeat the claims. That view ordinarily belongs in an argument to the Office rather than as the sole basis for withholding information the rule requires the Office to receive.

IV.       Filing an IDS Is Not an Admission

Rule 1.97’s nonadmission provisions are central to the proper understanding of the IDS. Filing a reference does not admit that the reference is prior art, material, enabling, analogous, or sufficient to anticipate or render a claim obvious. 37 C.F.R. § 1.97(g)–(h).

Consider a common prosecution scenario. A foreign search report cites a reference that discloses a sensor system containing several components recited in a pending U.S. claim. The reference, however, does not disclose the claimed spatial arrangement of those components or the required control sequence by which one operation occurs only after a specified condition is detected.

U.S. prosecution counsel submits the reference in an IDS. The examiner later relies on it in an anticipation rejection or combines it with another reference in an obviousness rejection. The applicant then explains that the first reference does not disclose every limitation arranged as claimed, defeating anticipation, and that the proposed combination does not supply an articulated reason to adopt the missing arrangement or control sequence.

Nothing about those positions is inconsistent. The applicant did not represent, by filing the IDS, that the reference established unpatentability. It ensured that the examiner could evaluate the reference and then addressed the reference on its merits.

That is not gamesmanship. It is the price of asking the government to issue a right enforceable against people who were not in the room.

The same principle applies more broadly. Counsel can identify missing claim elements, dispute a proposed combination, explain why a reference teaches away, present objective indicia of nonobviousness, or challenge whether the reference qualifies as prior art. The applicant also need not attach unnecessary labels to the submission. Describing a reference as “material,” “the closest art,” or part of the same technological field may create a record broader than necessary to secure consideration of the reference.

The point is not to avoid useful explanation. When a reference presents an issue central to patentability, an affirmative distinction may improve the examination record. But whether to characterize the reference should be a reasoned prosecution decision, not an assumed part of every IDS filing.

V.          Materiality and the Problem of Overdisclosure

Rule 56 does not require disclosure of every document that has some connection to the technology. Information is material when it is noncumulative and either establishes, alone or in combination with other information, a prima facie case of unpatentability or refutes or is inconsistent with a patentability position taken by the applicant. 37 C.F.R. § 1.56(b). There is no duty under the rule to submit information immaterial to every pending claim. Id. § 1.56(a).

Materiality limits the obligation. Too little disclosure can deprive the examiner of information needed for a sound decision. Indiscriminate disclosure can make the most pertinent information harder to identify and consume examination resources without materially improving the record.

The Federal Circuit confronted that second problem in Therasense, Inc. v. Becton, Dickinson & Co., 649 F.3d 1276 (Fed. Cir. 2011) (en banc). The court observed that expansive inequitable-conduct doctrine had encouraged prosecutors to inundate examiners with marginally relevant information, making important prior art more difficult to identify. Id. at 1288–90.

Therasense also separates two standards that are sometimes conflated. Rule 56 governs conduct before the USPTO. Inequitable conduct is a judicial defense to patent enforcement. For the latter, Therasense generally requires but-for materiality and specific intent to deceive, with an exception for affirmative egregious misconduct. Id. at 1290–93. The court expressly declined to adopt Rule 56’s materiality definition as the litigation standard. Id. at 1293–95.

The narrower Therasense standard does not rewrite Rule 56. Information may be subject to disclosure under the USPTO’s rule even though its later omission would not establish inequitable conduct under Therasense. Conversely, the severe consequences of inequitable conduct do not justify treating every remotely related reference as material.

The proper response is disciplined judgment. Individuals covered by the rule should identify known, noncumulative information that meets Rule 56’s standard and present it in a manner that allows meaningful examination. Volume alone proves very little. A submission that buries the pertinent reference among hundreds of marginal documents may satisfy a defensive instinct while doing little to assist the examiner.

VI.       The Prosecution Record After Issuance

An IDS becomes part of a public record that may later be examined by courts, the Patent Trial and Appeal Board, licensees, and competitors. Elekta Ltd. v. ZAP Surgical Systems, Inc., 81 F.4th 1368 (Fed. Cir. 2023), provides a modest illustration.

In affirming an obviousness determination, the Federal Circuit concluded that substantial evidence supported the Board’s motivation-to-combine finding. The supporting record included the asserted references, expert testimony, and prosecution history. The court noted that imaging-device references had been cited during prosecution and had not been distinguished on the ground that imaging devices were irrelevant art. Id. at 1375–76.

Elekta is not a Rule 56 decision. It does not hold that citation in an IDS admits materiality or analogous-art status. Nor does it establish a general rule that silence following citation concedes the relevance of a technological field. The prosecution history was one item in a larger evidentiary record.

The narrower lesson is that the prosecution record may remain relevant after allowance. The information placed before the Office, and the positions taken about it, may later inform how a tribunal understands the pertinent art or evaluates a patentability argument. Counsel should not respond by briefing every cited reference. Counsel should, however, consider whether a distinction important to allowance—such as why an adjacent field is not pertinent—should be stated expressly rather than assumed.

A clear record helps later readers understand what the examiner considered and why the claims issued. That matters when the patent is licensed, challenged, or enforced.

VII.   Four Habits for Practice

The practical ethic can be stated as four habits. Disclose known, noncumulative information that is material under Rule 56. Avoid gratuitous descriptions that may create unnecessary admissions. When a reference matters to the patentability analysis, make the relevant distinction rather than assuming it will remain obvious to later readers. And maintain a prosecution record sufficiently intelligible that an examiner or later tribunal can understand the basis on which the claims were allowed.

Those habits require communication among inventors, prosecuting counsel, foreign counsel, litigation counsel, and others substantively involved in prosecution. They also require separating three questions that are easily blurred: whether information must be disclosed, whether an explanation would assist examination, and how much characterization is prudent.

VIII.                  Conclusion

The philosophical basis for filing an IDS is not that patent counsel should be indifferent to allowance. It is that the government should grant an exclusionary right only after the Office has received the information that the governing rules require it to consider.

The discovery analogy explains how the IDS compensates, in part, for the absence of an opposing party. Brady supplies a qualified account of why public adjudication cannot be reduced to strategic control of information. Precision Instrument connects patent procurement to the public interest while illustrating, on extraordinary facts, the importance of allowing the Patent Office to evaluate relevant information. Therasense cautions against submissions that overwhelm rather than inform. Elekta shows, more modestly, that the resulting record may remain consequential after the patent issues.

An IDS is not a confession of unpatentability. It gives the Office the information needed to perform its assigned task while leaving the applicant free to explain why the claims should issue. A patent granted on that record rests on firmer ground than one obtained by taking advantage of what the examiner did not know.