8.2 Information Disclosure Statements (IDS) Requirements

Key Takeaways

  • To ensure consideration by the examiner, an Information Disclosure Statement must comply with the content rules of 37 C.F.R. § 1.98 and timing provisions of 37 C.F.R. § 1.97.
  • Form PTO/SB/08a (or e-IDS) is used to list U.S. patents, published applications, foreign patent documents, and non-patent literature (NPL).
  • Timing Tiers: Tier 1 (§ 1.97(b)) requires no fee/certification; Tier 2 (§ 1.97(c)) requires a fee OR § 1.97(e) certification; Tier 3 (§ 1.97(d)) requires BOTH fee AND certification.
  • The § 1.97(e) certification requires that references were first cited in a foreign communication or known to Rule 56(c) individuals within the preceding 3 months.
  • Foreign patent documents and non-patent literature listed in an IDS generally require legible copies; for a non-English item, the applicant supplies a concise explanation of relevance, which may use a known English translation.
Last updated: August 2026

To satisfy the duty of disclosure set forth in 37 C.F.R. § 1.56, applicants submit prior art and material information to the USPTO through an Information Disclosure Statement (IDS). Submitting an IDS is an administrative procedure governed strictly by two regulations: 37 C.F.R. § 1.98 (which dictates what must be submitted) and 37 C.F.R. § 1.97 (which dictates when and under what conditions it must be submitted). Understanding the interplay between timing tiers, fee requirements, and certification statements is one of the most frequently tested areas on the Patent Bar examination.

Content Requirements: 37 C.F.R. § 1.98

Under 37 C.F.R. § 1.98(a), a complete and compliant Information Disclosure Statement must include four distinct items:

  1. Itemized Listing (Form PTO/SB/08a/08b): A list of all patents, publications, applications, or other information submitted for consideration. Standard forms PTO/SB/08a (for U.S. patents and application publications) and PTO/SB/08b (for foreign documents and non-patent literature) or their electronic equivalents (e-IDS) must be used.
  2. Legible Copies of References: A legible copy of:
    • Each foreign patent document listed.
    • Each non-patent literature (NPL) item listed (e.g., journal articles, conference papers, website printouts).
    • Crucial Exception: Under 37 C.F.R. § 1.98(a)(2)(iii), copies of U.S. patents and U.S. patent application publications do not need to be submitted unless specifically requested by the examiner, as the USPTO maintains internal electronic access to U.S. patent records.
  3. Concise Explanation of Relevance: For each cited foreign document or NPL item that is not in the English language, the applicant must provide either:
    • A complete English translation, OR
    • A concise explanation of the relevance of the document (e.g., an English-language abstract or a statement indicating which specific claims or disclosure passages relate to the claimed invention) under 37 C.F.R. § 1.98(a)(3).
  4. Compliance with Timing and Fee Provisions: Submission of appropriate fees or certifications as mandated by 37 C.F.R. § 1.97.

If an IDS fails to comply with any requirement of § 1.98, the examiner will place the submission in the File Wrapper but will not initial or consider the non-compliant references, and the applicant will be notified of the defect.


The Three Timing Tiers: 37 C.F.R. § 1.97

The procedural obligations associated with filing an IDS depend entirely on when during examination the statement is filed. Section 1.97 divides application prosecution into three distinct timing periods or "tiers":

Timing TierProsecution WindowRequired Fee / Certification
Tier 1 (§ 1.97(b))• Within 3 months of U.S. filing date; OR<br/>• Within 3 months of 35 U.S.C. 371 national stage entry; OR<br/>• Before mailing of the 1st Office Action on the merits; OR<br/>• Before mailing of 1st Office Action after an RCE.NO Fee required AND NO § 1.97(e) Certification required.
Tier 2 (§ 1.97(c))• After Tier 1 window closes, BUT<br/>• Before or on the mailing date of a Final Office Action, a Notice of Allowance, or an Ex parte Quayle action.Requires EITHER:<br/>1. Statutory IDS Fee under 37 C.F.R. § 1.17(p); OR<br/>2. Section 1.97(e) Certification Statement.
Tier 3 (§ 1.97(d))• After mailing of Final Action, Notice of Allowance, or Ex parte Quayle action, BUT<br/>• Before or with payment of the Issue Fee.Requires BOTH:<br/>1. Statutory IDS Fee under 37 C.F.R. § 1.17(p); AND<br/>2. Section 1.97(e) Certification Statement.

The 37 C.F.R. § 1.97(e) Certification Statement

When filing an IDS under Tier 2 (to avoid paying a fee) or Tier 3 (where certification is mandatory alongside the fee), the applicant must include a formal certification signed by an authorized individual (inventor, practitioner of record, or assignee). Under 37 C.F.R. § 1.97(e), the statement must certify to either of the following two provisions:

  • 37 C.F.R. § 1.97(e)(1): That each item of information contained in the IDS was first cited in a communication from a foreign patent office in a counterpart foreign application not more than three months prior to the filing of the IDS; OR
  • 37 C.F.R. § 1.97(e)(2): That no item of information contained in the IDS was cited in a communication from a foreign patent office, and to the knowledge of the person signing the certification after reasonable inquiry, no item of information contained in the IDS was known to any individual designated in § 1.56(c) more than three months prior to the filing of the IDS.

Essential Exam Rules for § 1.97(e) Certifications:

  1. Strict 3-Month Window: The 3-month period runs from the date of the foreign office communication or the date the reference was first known to a Rule 56(c) individual to the date of filing the IDS.
  2. No Extensions of Time: The 3-month time period in § 1.97(e) cannot be extended under 37 C.F.R. § 1.136(a) or (b).
  3. Cannot Combine Tiers: If an applicant misses the 3-month window under § 1.97(e) in Tier 3 (after Notice of Allowance), the IDS cannot be considered by the examiner under § 1.97(d). The applicant must instead file a Petition to Withdraw the Application from Issue under 37 C.F.R. § 1.313 or file a Request for Continued Examination (RCE) under 37 C.F.R. § 1.114.

Submissions After Payment of Issue Fee

Once the Issue Fee has been paid, the USPTO will not consider any Information Disclosure Statement filed under 37 C.F.R. § 1.97. An IDS submitted after issue fee payment will simply be placed in the file wrapper unconsidered.

To have prior art considered after issue fee payment, the applicant must successfully petition to withdraw the application from issue under 37 C.F.R. § 1.313(c)(2) for the purpose of filing an RCE and submitting the IDS, or participate in special USPTO programs such as the Quick Path Information Disclosure Statement (QPIDS) program.

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IDS Timing Tiers Decision Flowchart
Test Your Knowledge

An applicant files a U.S. nonprovisional patent application on February 1. On April 15 of the same year, prior to receiving any Office Action from the examiner, the applicant files an Information Disclosure Statement listing three relevant non-patent literature articles. What are the administrative requirements for this IDS under 37 C.F.R. § 1.97(b)?

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Test Your Knowledge

Which of the following documents listed in an Information Disclosure Statement (IDS) does NOT require submitting a copy to the USPTO under 37 C.F.R. § 1.98(a)(2)?

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D
Test Your Knowledge

A patent attorney receives a Notice of Allowance for a client's patent application. Two weeks later (before paying the Issue Fee), the attorney receives a search report from the European Patent Office (EPO) in a counterpart European application citing a highly material French patent document. To have the French reference considered without reopening prosecution, what must the attorney submit under 37 C.F.R. § 1.97(d)?

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B
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D
Test Your Knowledge

An applicant receives a Final Office Action on June 1. On July 15, the applicant discovers a material non-patent publication that was known to the inventor eight months prior. Can the applicant submit this reference under 37 C.F.R. § 1.97(d) after the Final Action but before paying the issue fee?

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D