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What is an Information Disclosure Statement?

The duty of candor, the four filing windows under 37 C.F.R. § 1.97, and how docketing teams keep cross-citations current across a family.

Definition

An information disclosure statement (IDS) is the filing by which a patent applicant submits prior art and other information material to patentability to the USPTO for the examiner to consider. It is the mechanism for meeting the duty of candor under 37 C.F.R. § 1.56.

Key Facts

  • Rules: 37 C.F.R. §§ 1.56, 1.97, and 1.98
  • Who owes the duty: Every individual associated with the filing and prosecution, including inventors, attorneys, and assignees
  • Forms: SB/08 listing US patents, US publications, foreign documents, and non-patent literature
  • Copies: Required for foreign documents and non-patent literature; not for US patents and publications
  • Consequence of withholding: A patent procured through intentional nondisclosure can be held unenforceable for inequitable conduct

The Four Timing Windows

The cost of an IDS depends entirely on when it is filed:

  1. Within 3 months of filing or before the first office action on the merits: No fee and no statement required
  2. After the first action but before a final action or notice of allowance: Requires either a fee or a statement that the information was first cited in a foreign counterpart within the prior three months or otherwise unknown to anyone with the duty
  3. After a final action or notice of allowance but before the issue fee is paid: Requires both the statement and the fee
  4. After the issue fee is paid: Cannot be considered by IDS alone. Options are to withdraw from issue and file a request for continued examination, or use the Quick Path IDS program

The USPTO also charges size-based fees for statements that list more than 50, 100, or 200 references.

Cross-Citing Across a Family

Most IDS work is driven by foreign counterparts. When a European or Japanese examiner cites a reference, the US docketing team has three months from that citation to file an IDS in the US case under the window-two statement without paying the fee. Tracking this across a large patent family is one of the most repetitive tasks in a paralegal's week, and one of the easiest to automate.

Practical Guidance

  • File an initial IDS with the application, even if it lists only the references from the inventor's own search
  • Disclose references cited in related US cases, including parent and sibling applications
  • Do not bury a key reference in a list of hundreds; the examiner must consider it but courts have criticized the practice
  • Calendar a final review before paying the issue fee, since that is the last low-cost chance to disclose

Workflow automation that watches foreign counterparts and drafts the SB/08 removes most of the risk of a missed window.

FAQs

Frequently Asked Questions

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When is an IDS free to file?

An IDS filed within three months of the US filing date, or before the first office action on the merits, needs neither a fee nor a statement. The same applies within three months of entering the national stage of a PCT application.

Do you have to submit an IDS?

There is no requirement to file an IDS as such, but everyone involved in prosecution has a duty to disclose information known to be material to patentability. The IDS is the only way to meet that duty on the record, so in practice almost every application has one.

What happens if material prior art is not disclosed?

If the omission was intentional and the reference was material, a court can hold the entire patent unenforceable for inequitable conduct. Since the 2011 Therasense decision the standard requires but-for materiality and specific intent to deceive.

Do you need to include copies of the references?

Copies are required for foreign patent documents and non-patent literature. Copies of US patents and US published applications are not required, since the examiner can retrieve them directly.

Can an IDS be filed after the issue fee is paid?

Not on its own. The applicant must either petition to withdraw the application from issue and file a request for continued examination with the IDS, or use the Quick Path IDS program, which lets the examiner consider the reference without reopening prosecution if it does not affect allowance.

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