Duty of Candor Checklist: Who Is Bound, What Is Material, Timing, Cross-Citation, and Litigation Overlap

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This checklist installs a candor programme designed so that nobody has to exercise judgment under pressure, which is the failure mode the doctrine punishes. It begins by naming who is actually bound under Rule 56 and briefing them in one page with a single instruction. It then installs the four routing rules that close the categories producing almost every modern unenforceability finding - litigation contentions, foreign search reports, regulatory submissions, and the company's own product history. It specifies information disclosure statement mechanics window by window, automatic cross-citation as a docketing action, and the one-line disposition note that forecloses a deceptive-intent inference years later. It works the declaration protocol, the supplemental examination assessment including an honest survival analysis, legacy portfolio scoping, defending an allegation, and the annual test that settles whether any of it works.

IP and Technology > Patent Counseling Transactions | Checklist | Published 4 January 2025 - Updated 4 March 2025 | Casey Scott McKay - marksy.us

Summary. This checklist installs a candor programme designed so that nobody has to exercise judgment under pressure, which is the failure mode the doctrine punishes. It begins by naming who is actually bound under Rule 56 and briefing them in one page with a single instruction. It then installs the four routing rules that close the categories producing almost every modern unenforceability finding — litigation contentions, foreign search reports, regulatory submissions, and the company's own product history. It specifies information disclosure statement mechanics window by window, automatic cross-citation as a docketing action, and the one-line disposition note that forecloses a deceptive-intent inference years later. It works the declaration protocol, the supplemental examination assessment including an honest survival analysis, legacy portfolio scoping, defending an allegation, and the annual test that settles whether any of it works.

Keywords: bound individual list · one page briefing · litigation art routing · foreign search report transfer · regulatory review trigger · own product history · automatic cross-citation · IDS timing windows · safe harbor statement · content requirements · disposition in writing · declaration verification · comparator selection · supplemental examination assessment · survival analysis · legacy portfolio scoping · pleading challenge · privilege in defense · annual test · docketing configuration


How to use this checklist

| Phase | What it covers | |---|---| | 1 | The bound-individual list | | 2 | The one-page briefing | | 3 | Litigation art routing | | 4 | Foreign search reports | | 5 | Regulatory review trigger | | 6 | The company's own history | | 7 | Automatic cross-citation | | 8 | IDS timing windows | | 9 | IDS content | | 10 | Disposition in writing | | 11 | The declaration protocol | | 12 | Comparator and data selection | | 13 | When a problem is found | | 14 | Supplemental examination | | 15 | Survival analysis | | 16 | Legacy portfolio scoping | | 17 | Defending an allegation | | 18 | Privilege in the defense | | 19 | Docketing configuration | | 20 | Sector patterns | | 21 | The annual test | | 22 | Reporting |

Boxes marked [Gate] must clear before an application is filed, a declaration is executed, or a supplemental examination request is submitted.

The matter. A medical device company learned eight months late that litigation counsel had received an invalidity contention chart citing a reference that read directly on a limitation in a then-pending continuation. Nobody had a routing rule.


Phase 1. The bound-individual list


Phase 2. The one-page briefing


Phase 3. Litigation art routing


Phase 4. Foreign search reports


Phase 5. Regulatory review trigger


Phase 6. The company's own history


Phase 7. Automatic cross-citation


Phase 8. IDS timing windows


Phase 9. IDS content


Phase 10. Disposition in writing


Phase 11. The declaration protocol


Phase 12. Comparator and data selection


Phase 13. When a problem is found


Phase 14. Supplemental examination


Phase 15. Survival analysis


Phase 16. Legacy portfolio scoping


Phase 17. Defending an allegation


Phase 18. Privilege in the defense


Phase 19. Docketing configuration


Phase 20. Sector patterns


Phase 21. The annual test


Phase 22. Reporting

Outcome. The reference was submitted immediately in the pending continuation under 37 C.F.R. § 1.97, with the fee and without characterization, and the claims were amended before issuance. For the parent, which had issued four months after litigation counsel received the chart, materiality was arguable and intent was weak — the failure was structural, the chart had sat in a litigation inbox, and no document showed anyone considering and rejecting submission. A request for supplemental examination was nonetheless filed under 35 U.S.C. § 257 before any allegation was pleaded; the office found a substantial new question, reexamination followed, and the claims emerged narrowed but intact, with the statutory bar on unenforceability then applying. The cost was reexamination fees, a narrowing amendment, and eight months, against a counterclaim that would have put the whole family at risk. The company then installed the five-day routing rule, the mandatory disposition field, and the annual test.


Phase 23. Model one-page briefing

Hand this to every person on the Phase 1 list. The citations are for the drafter; the version they receive has none.

You have a duty of candor to the Patent Office

You are named on a patent application, or you are substantively involved in preparing or prosecuting one. That gives you a personal legal duty of candor and good faith toward the Patent Office.

What the duty is. If you know of information that is material to whether the claims should be granted, it has to be disclosed. "Material" means the claims probably would not have been allowed if the examiner had known about it.

What the duty is not. You are not required to go looking for anything. You are not required to form a legal opinion about whether something matters. You are not required to explain or characterize anything.

How long it lasts. For as long as the application is pending.

What counts. Publications and patents you know of. Products, systems, or software sold, used publicly, or offered for sale before we filed — including our own. Papers or talks you or your colleagues gave. Prior art cited against us in any litigation, any Patent Office proceeding, or by any foreign patent office. Testing results bearing on what we told the Office.

The only instruction that matters. If you become aware of anything that might be relevant to whether these claims should issue, send it to [named contact]. Do not decide yourself. Sending something irrelevant costs a line on a form; not sending something that mattered can make the patent unenforceable.

If you are asked to sign a declaration. Read every sentence and confirm you personally know it to be true.


Phase 24. Rewrite reference

Language that creates problems, and what to write instead.

| Written | Rewritten | |---|---| | Transmittal: "The cited reference does not disclose the claimed thermal isolation and is not material." | "Submission of these references is not an admission that they are prior art or that they are material." | | Disposition note: "Not relevant." | "Cumulative of US 7,123,456, already of record at IDS filed 3 March." | | Disposition note: (blank) | Any of the legitimate reasons in Phase 10, stated in one line. | | Declaration: "Surprisingly, the claimed compound outperformed the prior art." | "Compound A was compared against Compound B, which is the closest prior art because [reason]. The full data set is at Exhibit 1." | | Declaration: "Sales of the product have grown 400 percent." | Sales figures, plus the basis for attributing growth to the claimed feature rather than to price, advertising, or an unclaimed feature. | | Internal email: "We should probably not cite this one." | A disposition note in the file stating the actual reason, or a submission. | | Litigation counsel: "I'll hold this contention chart until we see if it goes anywhere." | Forward within five business days, logged. | | Engagement letter silent on routing | An express obligation to forward invalidity contentions, petitions, and prior art charts to prosecution counsel within five business days. |


Phase 25. Evidence request, written in advance

Draft once so it can be sent unchanged when an allegation arrives or a diligence request lands.

Why this belongs in the checklist. Several of these do not exist at most companies, and the week an inequitable conduct counterclaim is pleaded is the worst time to discover that the disposition records were never kept — because their absence is precisely the silence that makes deceptive intent available as the single most reasonable inference under Therasense v. Becton, Dickinson.


Phase 26. Ninety-day installation

What is deliberately deferred. The full legacy audit, which should be scoped by exposure rather than attempted comprehensively — and the decision not to audit the tail should itself be documented with its rationale.


Phase 27. Diligence, from both sides


Phase 28. Three things to say once


Phase 29. Quarterly dashboard

Six numbers, reported with the portfolio metrics rather than separately.

And one annual composite: the results of the Phase 21 test — references known during pendency, submitted, dispositioned, and gaps — for the patent examined. That is the only number that measures the programme's actual output rather than its activity, and it is the one worth putting in front of whoever funds it.


Key Authorities at a Glance

| Authority | Proposition | |---|---| | 37 C.F.R. § 1.56 | Duty of candor; who is bound | | 37 C.F.R. § 1.97 | IDS timing, fees, statements, safe harbor | | 37 C.F.R. § 1.98 | IDS content requirements | | 35 U.S.C. § 257 | Supplemental examination; statutory cure | | 35 U.S.C. § 302 | Ex parte reexamination | | 35 U.S.C. § 282 | Defenses | | 35 U.S.C. § 285 | Exceptional case fee shifting | | 35 U.S.C. § 102 | Prior art, including the company's own | | 35 U.S.C. § 103 | Obviousness; objective indicia | | 35 U.S.C. § 115 | Inventor declarations | | 35 U.S.C. § 120 | Family scope for cross-citation | | Therasense v. Becton, Dickinson | But-for materiality; specific intent | | Kingsdown Medical Consultants v. Hollister | Gross negligence insufficient | | Exergen v. Wal-Mart Stores | Pleading particularity | | Aventis Pharma v. Hospira | Withheld art relied on by the applicant | | American Calcar v. American Honda Motor | Selective disclosure | | Regeneron Pharmaceuticals v. Merus | Litigation misconduct supplying intent | | Ohio Willow Wood v. Alps South | Undisclosed relationships | | Belcher Pharmaceuticals v. Hospira | Regulatory information | | Precision Instrument v. Automotive Maintenance | Unclean hands | | Keystone Driller v. General Excavator | Equitable origins | | Hazel-Atlas Glass v. Hartford-Empire | Fraud on the court | | Fed. R. Civ. P. 9 | Particularity | | 15 U.S.C. § 2 | Walker Process exposure |


The five things people get wrong

Treating cross-citation as a judgment call. A reference cited in one family member is known to the practitioner and must be considered for the others. The moment this becomes a decision rather than a docketing action it stops happening, and it is the most common genuine omission in practice.

Leaving litigation art in litigation counsel's inbox. Almost every modern unenforceability finding involves information the company already held for a different purpose. An invalidity contention chart is known prior art, and the five-day routing rule that fixes this costs nothing at all.

Considering a reference and submitting nothing, with no note. Under Therasense the challenger must show deceptive intent as the single most reasonable inference. Silence in the file is what makes that inference available; a one-line contemporaneous explanation forecloses it.

Confusing candor materiality with litigation invalidity. Materiality is but-for, on a preponderance, under the broadest reasonable interpretation the office applies. Invalidity is clear and convincing, under the court's construction. A reference can be material for candor and insufficient to invalidate — and the instinct to treat any acknowledgment of a reference as fatal everywhere is precisely what produces the non-disclosure.

Waiting for litigation before considering supplemental examination. 35 U.S.C. § 257 is unavailable once the allegation is pleaded. A patent owner who suspects a problem and does nothing has forfeited the only statutory cure available.


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This document is general information about the law, not legal advice, and does not create an attorney-client relationship. Candor obligations turn on the specific record and the individuals involved. Marksy is not a law firm.

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