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11.3 Derivation Proceedings Under the AIA

Key Takeaways

  • The Leahy-Smith America Invents Act (AIA) replaced interference proceedings with derivation proceedings under 35 U.S.C. § 135 for applications subject to the first-inventor-to-file system.

  • To prove derivation, the petitioner must establish prior conception of the claimed invention and unauthorized communication of that conception to the respondent.

  • A derivation petition must be filed strictly within a 1-year window from the date of first publication of a claim to the derived invention (or grant of patent containing such claim).

  • Derivation proceedings are conducted as trial proceedings before the PTAB governed by 37 C.F.R. Part 42, Subpart E.

  • Parties may settle derivation proceedings under 35 U.S.C. § 135(e), provided a written agreement is filed in the USPTO before termination of the proceeding.

Last updated: August 2026

11.3 Derivation Proceedings Under the AIA

With the enactment of the Leahy-Smith America Invents Act (AIA), the United States patent system transitioned from a first-to-invent regime to a first-inventor-to-file (FITF) regime for applications having an effective filing date on or after March 16, 2013. This statutory overhaul fundamentally transformed contest proceedings before the Patent Trial and Appeal Board (PTAB). While pre-AIA applications relied on Interference Proceedings under former 35 U.S.C. § 135 to determine priority of invention, AIA applications are subject to Derivation Proceedings under 35 U.S.C. § 135 and MPEP Chapter 2300.


Interferences vs. Derivation Proceedings

Understanding the conceptual difference between pre-AIA Interferences and AIA Derivation is a frequent focal point of the Patent Bar Examination:

  • Pre-AIA Interferences: Purpose was to determine priority of invention (i.e., who was the first person to invent the claimed subject matter). Two independent inventors who derived nothing from each other could be placed in an interference to determine priority based on conception, reduction to practice, and diligence.
  • AIA Derivation Proceedings: Purpose is to determine derivation (i.e., whether an earlier-filing applicant stole or derived the claimed invention from a true inventor without authorization). Priority of independent invention is irrelevant under FITF; derivation focuses solely on whether the respondent derived the invention from the petitioner.

Statutory Elements to Establish Derivation (35 U.S.C. § 135(a))

Under 35 U.S.C. § 135(a) and 37 C.F.R. § 42.405, a derivation petition filed by an applicant or patentee must set forth detailed factual allegations supported by corroborating evidence establishing two core legal elements:

  1. Prior Conception by Petitioner: The petitioner must prove complete conception of the claimed invention prior to any conception or filing date attributable to the respondent. The conception must be fully enabled and definite, leaving only ordinary skill to reduce the invention to practice.
  2. Unauthorized Communication to Respondent: The petitioner must prove that this complete conception was communicated (directly or indirectly) to the respondent without authorization, such that the respondent derived the claimed subject matter from the petitioner.

Corroboration Requirement:

Under 37 C.F.R. § 42.408, inventor testimony alone is insufficient to establish prior conception or communication. Factual allegations of derivation must be corroborated by independent evidence, such as dated lab notebooks, email communications, non-disclosure agreements (NDAs), witness declarations, or physical prototypes.


Strict 1-Year Petition Window (35 U.S.C. § 135(a)(2))

Procedural timeliness is strictly enforced in derivation proceedings. Under 35 U.S.C. § 135(a)(2) and 37 C.F.R. § 42.403:

  • The Rule: A petition for derivation must be filed within 1 year from the date of first publication of a claim to an invention that is the same or substantially the same as the derived invention in an application or issued patent of the respondent.
  • Statutory Bar: This 1-year window is a strict statutory deadline. If a petitioner fails to file within 1 year of the respondent's claim publication or patent grant date, the derivation petition is time-barred and must be dismissed by the Board.
  • Same or Substantially the Same Claim Requirement: The petitioner must currently have (or amend to include) at least one claim in its own application/patent that is "same or substantially the same" as the respondent's derived claim.

PTAB Trial Procedures for Derivation (37 C.F.R. Part 42, Subpart E)

Derivation proceedings are conducted as formal administrative trials before a three-judge panel of the PTAB under 37 C.F.R. Part 42, Subpart E.

Key Procedural Steps:

  1. Petition Filing: Petitioner files petition along with the required statutory fee under 37 C.F.R. § 42.15(c) and supporting affidavits/evidence.
  2. Institution Decision: The Board reviews the petition and respondent's preliminary response. The Board will institute a derivation trial only if it determines that the standards in 37 C.F.R. § 42.408 are met (demonstrating a reasonable likelihood of derivation).
  3. Trial Phase: If instituted, the trial involves routine discovery (cross-examination of declarants), motion practice, and oral argument.
  4. Final Written Decision: The PTAB issues a Final Written Decision under 35 U.S.C. § 135(d).

Remedies & Outcomes:

  • If derivation is proven, the Board issues a decision canceling the derived claims in the respondent's patent or refusing them in the respondent's application.
  • The Board may correct inventorship or authorize the petitioner to amend its application to claim the derived subject matter with the benefit of the respondent's filing date under 35 U.S.C. § 135(d).

Settlement of Derivation Proceedings (35 U.S.C. § 135(e))

Under 35 U.S.C. § 135(e) and 37 C.F.R. § 42.410, parties to a derivation proceeding may settle their dispute, subject to strict statutory recording rules:

  • Written Agreement Required: Any agreement or understanding between the parties (including collateral agreements) made in connection with or in contemplation of the termination of a derivation proceeding must be reduced to writing.
  • Filing Prior to Termination: A true copy of the written settlement agreement must be filed in the USPTO before the termination of the derivation proceeding.
  • Confidentiality: Parties may request that the settlement agreement be kept confidential and separate from the public file, accessible only to government agencies or persons showing good cause.

Derivation vs. Interference Comparison Table

AttributePre-AIA Interference ProceedingAIA Derivation Proceeding
Governing StatuteFormer 35 U.S.C. § 13535 U.S.C. § 135 (AIA)
ApplicabilityFirst-to-Invent applications (pre-March 16, 2013)First-Inventor-to-File applications (post-March 16, 2013)
Primary IssuePriority of invention (who invented first)Unauthorized communication/derivation (who stole invention)
Independent InventorsYes, evaluated competing independent inventorsNo, independent creation is not subject to derivation
Petition WindowTriggered by examiner declaration or applicant requestStrict 1-year window from publication of derived claim
Evidentiary StandardProof of conception, reduction to practice, diligencePrior conception + unauthorized communication + corroboration
Settlement FilingRequired under former § 135(c)Mandatory written filing under 35 U.S.C. § 135(e)
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AIA Derivation Proceeding Lifecycle
Test Your Knowledge

What is the fundamental legal distinction between pre-AIA Interference proceedings and AIA Derivation proceedings under 35 U.S.C. § 135?

A

Interferences determined priority of invention between independent inventors, whereas derivation proceedings determine whether an applicant derived the invention from a prior inventor without authorization.

B

Interferences applied only to design patents, whereas derivation proceedings apply only to utility patents.

C

Interferences were conducted in federal district court, whereas derivation proceedings are conducted by primary examiners.

D

Derivation proceedings determine who reduced the invention to practice first, whereas interferences ignored reduction to practice.

Test Your Knowledge

To establish a prima facie case of derivation under 35 U.S.C. § 135(a), what two core elements must the petitioner prove with corroborating evidence?

A

Prior conception of the claimed invention by the petitioner and unauthorized communication of that conception to the respondent.

B

Prior commercial exploitation by the petitioner and filing of a foreign priority document.

C

Reduction to practice by the respondent and payment of maintenance fees by the petitioner.

D

Abandonment of the application by the respondent and joint inventorship between the parties.

Test Your Knowledge

An applicant discovers that a competitor's patent application publishing a derived claim was published on June 1, 2024. What is the statutory deadline for the applicant to file a derivation petition under 35 U.S.C. § 135(a)(2)?

A

Within 6 months from publication date (December 1, 2024).

B

Within 1 year from publication date (June 1, 2025).

C

Within 3 years from publication date, subject to 5-month extensions.

D

Any time prior to payment of the issue fee in the applicant's own application.

Test Your Knowledge

Parties to an AIA derivation proceeding before the PTAB agree to settle their dispute. What statutory requirement must be satisfied under 35 U.S.C. § 135(e) regarding the settlement?

A

The settlement must be approved by a federal district court judge in the Eastern District of Virginia.

B

The parties must pay a 50% surcharge on all future maintenance fees.

C

The parties must publish the terms of the settlement in the Official Gazette.

D

A true copy of the written settlement agreement must be filed in the USPTO before the termination of the derivation proceeding.

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