MPEP § 715.02 — How Much of the Claimed Invention Must Be Shown, Including the General Rule as to Generic Claims (Annotated Rules)

§715.02 How Much of the Claimed Invention Must Be Shown, Including the General Rule as to Generic Claims

USPTO MPEP version: BlueIron's Update: 2025-12-31

This page consolidates and annotates all enforceable requirements under MPEP § 715.02, including statutory authority, regulatory rules, examiner guidance, and practice notes. It is provided as guidance, with links to the ground truth sources. This is information only, it is not legal advice.

How Much of the Claimed Invention Must Be Shown, Including the General Rule as to Generic Claims

This section addresses How Much of the Claimed Invention Must Be Shown, Including the General Rule as to Generic Claims. Primary authority: 35 U.S.C. 103(a), 37 CFR 1.131(a), and 37 CFR 1.131. Contains: 4 requirements, 1 permission, and 2 other statements.

Key Rules

Topic

Effective Date of Reference

3 rules
StatutoryRequiredAlways
[mpep-715-02-7754d99675dbc47fec1be31a]
Affidavit Must Show Obvious Variations
Note:
An applicant can overcome a rejection by showing that the differences between the claimed invention and the evidence under 37 CFR 1.131 would have been obvious to one of ordinary skill in the art, provided the affidavit establishes possession of the basic inventive concept.

Even if applicant’s 37 CFR 1.131(a) affidavit is not fully commensurate with the rejected claim, the applicant can still overcome the rejection by showing that the differences between the claimed invention and the showing under 37 CFR 1.131(a) would have been obvious to one of ordinary skill in the art, in view of applicant’s 37 CFR 1.131(a) evidence, prior to the effective date of the reference(s) or the activity. Such evidence is sufficient because the inventor's possession of what is shown carries with it possession of variations and adaptations which would have been obvious, at the same time, to one of ordinary skill in the art. However, the affidavit or declaration must still establish possession of the invention by the inventor (i.e., the basic inventive concept) and not just of what one reference (in a combination of applied references) happens to show, if that reference does not itself teach the basic inventive concept. In re Spiller, 500 F.2d 1170, 182 USPQ 614 (CCPA 1974) (Claimed invention was use of electrostatic forces to adhere dry starch particles to a wet paper web on the Fourdrinier wire of a paper-making machine. 37 CFR 1.131 affidavit established use of electrostatic forces to adhere starch particles to wet blotting paper moved over a fluidized bed of starch particles prior to the applied reference date. Affidavit was sufficient in view of prior art reference showing that deposition of dry coatings directly on wet webs on the Fourdrinier wire of a paper-making machine was well known in the art prior to the date of the applied reference. The affidavit established possession of the basic invention by the inventor, i.e., use of electrostatic forces to adhere starch to wet paper.).

Jump to MPEP Source · 37 CFR 1.131(a)Effective Date of ReferenceDifferences Between Claimed Invention and Prior ArtLevel of Ordinary Skill in the Art
StatutoryInformativeAlways
[mpep-715-02-3e949531e5d413bb991fc51e]
Affidavit Establishes Electrostatic Starch Adhesion
Note:
An affidavit must establish the use of electrostatic forces to adhere starch particles to wet blotting paper moved over a fluidized bed prior to the reference date to overcome rejection.

Even if applicant’s 37 CFR 1.131(a) affidavit is not fully commensurate with the rejected claim, the applicant can still overcome the rejection by showing that the differences between the claimed invention and the showing under 37 CFR 1.131(a) would have been obvious to one of ordinary skill in the art, in view of applicant’s 37 CFR 1.131(a) evidence, prior to the effective date of the reference(s) or the activity. Such evidence is sufficient because the inventor's possession of what is shown carries with it possession of variations and adaptations which would have been obvious, at the same time, to one of ordinary skill in the art. However, the affidavit or declaration must still establish possession of the invention by the inventor (i.e., the basic inventive concept) and not just of what one reference (in a combination of applied references) happens to show, if that reference does not itself teach the basic inventive concept. In re Spiller, 500 F.2d 1170, 182 USPQ 614 (CCPA 1974) (Claimed invention was use of electrostatic forces to adhere dry starch particles to a wet paper web on the Fourdrinier wire of a paper-making machine. 37 CFR 1.131 affidavit established use of electrostatic forces to adhere starch particles to wet blotting paper moved over a fluidized bed of starch particles prior to the applied reference date. Affidavit was sufficient in view of prior art reference showing that deposition of dry coatings directly on wet webs on the Fourdrinier wire of a paper-making machine was well known in the art prior to the date of the applied reference. The affidavit established possession of the basic invention by the inventor, i.e., use of electrostatic forces to adhere starch to wet paper.).

Jump to MPEP Source · 37 CFR 1.131(a)Effective Date of ReferenceDifferences Between Claimed Invention and Prior ArtLevel of Ordinary Skill in the Art
StatutoryInformativeAlways
[mpep-715-02-d957078505f85f1396bf7e82]
Affidavit Must Establish Basic Invention Possession
Note:
The affidavit must demonstrate the inventor's possession of the basic inventive concept, not just specific variations shown in prior art.

Even if applicant’s 37 CFR 1.131(a) affidavit is not fully commensurate with the rejected claim, the applicant can still overcome the rejection by showing that the differences between the claimed invention and the showing under 37 CFR 1.131(a) would have been obvious to one of ordinary skill in the art, in view of applicant’s 37 CFR 1.131(a) evidence, prior to the effective date of the reference(s) or the activity. Such evidence is sufficient because the inventor's possession of what is shown carries with it possession of variations and adaptations which would have been obvious, at the same time, to one of ordinary skill in the art. However, the affidavit or declaration must still establish possession of the invention by the inventor (i.e., the basic inventive concept) and not just of what one reference (in a combination of applied references) happens to show, if that reference does not itself teach the basic inventive concept. In re Spiller, 500 F.2d 1170, 182 USPQ 614 (CCPA 1974) (Claimed invention was use of electrostatic forces to adhere dry starch particles to a wet paper web on the Fourdrinier wire of a paper-making machine. 37 CFR 1.131 affidavit established use of electrostatic forces to adhere starch particles to wet blotting paper moved over a fluidized bed of starch particles prior to the applied reference date. Affidavit was sufficient in view of prior art reference showing that deposition of dry coatings directly on wet webs on the Fourdrinier wire of a paper-making machine was well known in the art prior to the date of the applied reference. The affidavit established possession of the basic invention by the inventor, i.e., use of electrostatic forces to adhere starch to wet paper.).

Jump to MPEP Source · 37 CFR 1.131(a)Effective Date of ReferenceDifferences Between Claimed Invention and Prior ArtLevel of Ordinary Skill in the Art
Topic

Determining Whether Application Is AIA or Pre-AIA

2 rules
StatutoryRequiredAlways
[mpep-715-02-33d19dc71825ffa35e7df07b]
Affidavit Requirement for Obvious Claims
Note:
An affidavit under 37 CFR 1.131(a) is required to show no more than the reference discloses when differences between claimed invention and reference are minor.

The 37 CFR 1.131(a) affidavit or declaration must establish possession of either the whole invention claimed or something falling within the claim (such as a species of a claimed genus), in the sense that the claim as a whole reads on it. In re Tanczyn, 347 F.2d 830, 146 USPQ 298 (CCPA 1965) (Where applicant claims an alloy comprising both nitrogen and molybdenum, an affidavit showing applicant made an alloy comprising nitrogen but not molybdenum is not sufficient under 37 CFR 1.131 to overcome a rejection under pre‑AIA 35 U.S.C. 103(a) based on the combined teachings of one reference disclosing an alloy comprising nitrogen but not molybdenum and a second reference disclosing an alloy comprising molybdenum but not nitrogen). Note, however, where the differences between the claimed invention and the disclosure of the reference(s) are so small as to render the claims obvious over the reference(s), an affidavit or declaration under 37 CFR 1.131(a) is required to show no more than the reference shows. In re Stryker, 435 F.2d 1340, 168 USPQ 372 (CCPA 1971). In other words, where the examiner, in rejecting a claim under pre‑AIA 35 U.S.C. 103(a), has treated a claim limitation as being an obvious feature or modification of the disclosure of the reference(s) relied upon, without citation of a reference which teaches such feature or modification, a 37 CFR 1.131(a) affidavit or declaration may be sufficient to overcome the rejection even if it does not show such feature or modification.

Jump to MPEP Source · 37 CFR 1.131(a)Determining Whether Application Is AIA or Pre-AIADifferences Between Claimed Invention and Prior ArtDetermining AIA vs Pre-AIA Applicability (MPEP 2159)
StatutoryRequiredAlways
[mpep-715-02-96f184b1aadc132a60987024]
37 CFR 1.131(a) Affidavit Must Establish Invention Possession
Note:
The affidavit or declaration under 37 CFR 1.131(a) must demonstrate the inventor's possession of the claimed invention, not just what Reference A shows if it does not teach the basic inventive concept.

Where a claim has been rejected under pre‑AIA 35 U.S.C. 103(a) based on Reference A in view of Reference B, with the prior art date of secondary Reference B being earlier than that of Reference A, the applicant can rely on the teachings of Reference B to show that the differences between what is shown in the 37 CFR 1.131(a) affidavit or declaration and the claimed invention would have been obvious to one of ordinary skill in the art before the prior art date of Reference A. However, the 37 CFR 1.131(a) affidavit or declaration must still establish the inventor's possession of the claimed invention, not just what Reference A shows, if Reference A does not teach the basic inventive concept.

Jump to MPEP Source · 37 CFR 1.131(a)Determining Whether Application Is AIA or Pre-AIADifferences Between Claimed Invention and Prior ArtLevel of Ordinary Skill in the Art
Topic

Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)

1 rules
StatutoryInformativeAlways
[mpep-715-02-1877b540ba8ac7136d0e6c81]
Requirement for Pre-AIA Prior Art Disclosure
Note:
The rule requires that prior art under pre-AIA 35 U.S.C. 102 must be disclosed in the application.

[Editor Note: This MPEP section is not applicable to applications subject to the first inventor to file provisions of the AIA unless being relied upon to overcome a rejection under pre-AIA 35 U.S.C. 102(g). See 35 U.S.C. 100 (note) and MPEP § 2159. For a discussion of 37 CFR 1.130, affidavits or declarations of attribution or prior public disclosure in applications subject to the first inventor to file provisions of the AIA, see MPEP § 717. For a discussion of affidavits or declarations under 37 CFR 1.131(c), see MPEP § 718.]

Jump to MPEP Source · 37 CFR 1.130Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)AIA vs Pre-AIA PracticeDetermining Whether Application Is AIA or Pre-AIA
Topic

AIA vs Pre-AIA Practice

1 rules
StatutoryInformativeAlways
[mpep-715-02-d1836750b13cce1d907d3e16]
Affidavits or Declarations for AIA First Inventor to File Provisions
Note:
This rule discusses the requirement for affidavits or declarations of attribution or prior public disclosure in applications subject to the first inventor to file provisions of the America Invents Act (AIA).

[Editor Note: This MPEP section is not applicable to applications subject to the first inventor to file provisions of the AIA unless being relied upon to overcome a rejection under pre-AIA 35 U.S.C. 102(g). See 35 U.S.C. 100 (note) and MPEP § 2159. For a discussion of 37 CFR 1.130, affidavits or declarations of attribution or prior public disclosure in applications subject to the first inventor to file provisions of the AIA, see MPEP § 717. For a discussion of affidavits or declarations under 37 CFR 1.131(c), see MPEP § 718.]

Jump to MPEP Source · 37 CFR 1.130AIA vs Pre-AIA PracticeDetermining Whether Application Is AIA or Pre-AIADetermining AIA vs Pre-AIA Applicability (MPEP 2159)
Topic

Antedating Reference – Pre-AIA (MPEP 2136.05)

1 rules
StatutoryInformativeAlways
[mpep-715-02-3224afe0b3e8a9eb55faf811]
Declaration Under 37 CFR 1.131(c)
Note:
Discusses affidavits or declarations under 37 CFR 1.131(c), which must be relied upon to overcome pre-AIA 35 U.S.C. 102(g) rejections.

[Editor Note: This MPEP section is not applicable to applications subject to the first inventor to file provisions of the AIA unless being relied upon to overcome a rejection under pre-AIA 35 U.S.C. 102(g). See 35 U.S.C. 100 (note) and MPEP § 2159. For a discussion of 37 CFR 1.130, affidavits or declarations of attribution or prior public disclosure in applications subject to the first inventor to file provisions of the AIA, see MPEP § 717. For a discussion of affidavits or declarations under 37 CFR 1.131(c), see MPEP § 718.]

Jump to MPEP Source · 37 CFR 1.130Antedating Reference – Pre-AIA (MPEP 2136.05)Determining Whether Application Is AIA or Pre-AIADetermining AIA vs Pre-AIA Applicability (MPEP 2159)
Topic

Assignee as Applicant Signature

1 rules
StatutoryRequiredAlways
[mpep-715-02-9e7bd39b62f69601d89f2bbd]
Affidavit Requirement for Claimed Invention Possession
Note:
The affidavit must demonstrate possession of the claimed invention or a species within it to overcome prior art rejections.

The 37 CFR 1.131(a) affidavit or declaration must establish possession of either the whole invention claimed or something falling within the claim (such as a species of a claimed genus), in the sense that the claim as a whole reads on it. In re Tanczyn, 347 F.2d 830, 146 USPQ 298 (CCPA 1965) (Where applicant claims an alloy comprising both nitrogen and molybdenum, an affidavit showing applicant made an alloy comprising nitrogen but not molybdenum is not sufficient under 37 CFR 1.131 to overcome a rejection under pre‑AIA 35 U.S.C. 103(a) based on the combined teachings of one reference disclosing an alloy comprising nitrogen but not molybdenum and a second reference disclosing an alloy comprising molybdenum but not nitrogen). Note, however, where the differences between the claimed invention and the disclosure of the reference(s) are so small as to render the claims obvious over the reference(s), an affidavit or declaration under 37 CFR 1.131(a) is required to show no more than the reference shows. In re Stryker, 435 F.2d 1340, 168 USPQ 372 (CCPA 1971). In other words, where the examiner, in rejecting a claim under pre‑AIA 35 U.S.C. 103(a), has treated a claim limitation as being an obvious feature or modification of the disclosure of the reference(s) relied upon, without citation of a reference which teaches such feature or modification, a 37 CFR 1.131(a) affidavit or declaration may be sufficient to overcome the rejection even if it does not show such feature or modification.

Jump to MPEP Source · 37 CFR 1.131(a)Assignee as Applicant SignatureApplicant and Assignee Filing Under AIAObviousness Under AIA (MPEP 2158)
Topic

Obviousness Under AIA (MPEP 2158)

1 rules
StatutoryPermittedAlways
[mpep-715-02-b59fcffe3bbf6e3c49f8fb6a]
Affidavit Can Overcome Obviousness Without Showing Modification
Note:
An affidavit can suffice to overcome an obviousness rejection if the examiner treated a claim limitation as an obvious feature or modification without citing relevant references, even if it does not demonstrate the specific modification.

The 37 CFR 1.131(a) affidavit or declaration must establish possession of either the whole invention claimed or something falling within the claim (such as a species of a claimed genus), in the sense that the claim as a whole reads on it. In re Tanczyn, 347 F.2d 830, 146 USPQ 298 (CCPA 1965) (Where applicant claims an alloy comprising both nitrogen and molybdenum, an affidavit showing applicant made an alloy comprising nitrogen but not molybdenum is not sufficient under 37 CFR 1.131 to overcome a rejection under pre‑AIA 35 U.S.C. 103(a) based on the combined teachings of one reference disclosing an alloy comprising nitrogen but not molybdenum and a second reference disclosing an alloy comprising molybdenum but not nitrogen). Note, however, where the differences between the claimed invention and the disclosure of the reference(s) are so small as to render the claims obvious over the reference(s), an affidavit or declaration under 37 CFR 1.131(a) is required to show no more than the reference shows. In re Stryker, 435 F.2d 1340, 168 USPQ 372 (CCPA 1971). In other words, where the examiner, in rejecting a claim under pre‑AIA 35 U.S.C. 103(a), has treated a claim limitation as being an obvious feature or modification of the disclosure of the reference(s) relied upon, without citation of a reference which teaches such feature or modification, a 37 CFR 1.131(a) affidavit or declaration may be sufficient to overcome the rejection even if it does not show such feature or modification.

Jump to MPEP Source · 37 CFR 1.131(a)Obviousness Under AIA (MPEP 2158)AIA vs Pre-AIA PracticeObviousness
Topic

Scope and Content of Prior Art

1 rules
StatutoryInformativeAlways
[mpep-715-02-f08dde626f13db92918b4a44]
Affidavit Showing Known Art Is Sufficient to Overcome Rejection
Note:
An affidavit showing that a known technique was used prior to the reference date is sufficient to overcome rejection if it demonstrates possession of the basic inventive concept.

Even if applicant’s 37 CFR 1.131(a) affidavit is not fully commensurate with the rejected claim, the applicant can still overcome the rejection by showing that the differences between the claimed invention and the showing under 37 CFR 1.131(a) would have been obvious to one of ordinary skill in the art, in view of applicant’s 37 CFR 1.131(a) evidence, prior to the effective date of the reference(s) or the activity. Such evidence is sufficient because the inventor's possession of what is shown carries with it possession of variations and adaptations which would have been obvious, at the same time, to one of ordinary skill in the art. However, the affidavit or declaration must still establish possession of the invention by the inventor (i.e., the basic inventive concept) and not just of what one reference (in a combination of applied references) happens to show, if that reference does not itself teach the basic inventive concept. In re Spiller, 500 F.2d 1170, 182 USPQ 614 (CCPA 1974) (Claimed invention was use of electrostatic forces to adhere dry starch particles to a wet paper web on the Fourdrinier wire of a paper-making machine. 37 CFR 1.131 affidavit established use of electrostatic forces to adhere starch particles to wet blotting paper moved over a fluidized bed of starch particles prior to the applied reference date. Affidavit was sufficient in view of prior art reference showing that deposition of dry coatings directly on wet webs on the Fourdrinier wire of a paper-making machine was well known in the art prior to the date of the applied reference. The affidavit established possession of the basic invention by the inventor, i.e., use of electrostatic forces to adhere starch to wet paper.).

Jump to MPEP Source · 37 CFR 1.131(a)Scope and Content of Prior ArtPrior ArtEffective Date of Reference
Topic

AIA Effective Dates

1 rules
StatutoryRequiredAlways
[mpep-715-02-290360edd8b7823dfeaa5e69]
Requirement for Showing Invention Before Reference Date
Note:
Applicant must show the invention was completed before any reference's effective date to overcome a pre-AIA 103 rejection, with an affidavit demonstrating possession of the claimed invention or something falling within it.

Applicant may overcome a pre‑AIA 35 U.S.C. 103(a) rejection based on a combination of references by showing completion of the invention by the inventor prior to the effective date of any of the references; applicant need not antedate the reference with the earliest prior art date. However, as discussed above, applicant’s 37 CFR 1.131(a) affidavit must show possession by the inventor of either the whole invention as claimed or something falling within the claim(s) before the prior art date of the reference being antedated; it is not enough merely to show possession of what the reference happens to show if the reference does not teach the basic inventive concept.

Jump to MPEP Source · 37 CFR 1.131(a)AIA Effective DatesAssignee as Applicant SignatureAIA Overview and Effective Dates

Citations

Primary topicCitation
AIA vs Pre-AIA Practice
Antedating Reference – Pre-AIA (MPEP 2136.05)
Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
35 U.S.C. § 100
AIA vs Pre-AIA Practice
Antedating Reference – Pre-AIA (MPEP 2136.05)
Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
35 U.S.C. § 102(g)
AIA Effective Dates
Assignee as Applicant Signature
Determining Whether Application Is AIA or Pre-AIA
Obviousness Under AIA (MPEP 2158)
35 U.S.C. § 103(a)
AIA vs Pre-AIA Practice
Antedating Reference – Pre-AIA (MPEP 2136.05)
Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
37 CFR § 1.130
Assignee as Applicant Signature
Determining Whether Application Is AIA or Pre-AIA
Effective Date of Reference
Obviousness Under AIA (MPEP 2158)
Scope and Content of Prior Art
37 CFR § 1.131
AIA Effective Dates
Assignee as Applicant Signature
Determining Whether Application Is AIA or Pre-AIA
Effective Date of Reference
Obviousness Under AIA (MPEP 2158)
Scope and Content of Prior Art
37 CFR § 1.131(a)
AIA vs Pre-AIA Practice
Antedating Reference – Pre-AIA (MPEP 2136.05)
Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
37 CFR § 1.131(c)
AIA vs Pre-AIA Practice
Antedating Reference – Pre-AIA (MPEP 2136.05)
Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
MPEP § 2159
MPEP § 715.03
AIA vs Pre-AIA Practice
Antedating Reference – Pre-AIA (MPEP 2136.05)
Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
MPEP § 717
AIA vs Pre-AIA Practice
Antedating Reference – Pre-AIA (MPEP 2136.05)
Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)
MPEP § 718
In re Clarke, 356 F.2d 987, 991, 148 USPQ 665, 669 (CCPA 1966)
In re Dafano, 392 F.2d 280, 157 USPQ 192 (CCPA 1968)
In re Fong, 288 F.2d 932, 129 USPQ 264 (CCPA 1961)
Effective Date of Reference
Scope and Content of Prior Art
In re Spiller, 500 F.2d 1170, 182 USPQ 614 (CCPA 1974)
Assignee as Applicant Signature
Determining Whether Application Is AIA or Pre-AIA
Obviousness Under AIA (MPEP 2158)
In re Stryker, 435 F.2d 1340, 168 USPQ 372 (CCPA 1971)
Assignee as Applicant Signature
Determining Whether Application Is AIA or Pre-AIA
Obviousness Under AIA (MPEP 2158)
In re Tanczyn, 347 F.2d 830, 146 USPQ 298 (CCPA 1965)
In re Wakefield, 422 F.2d 897, 164 USPQ 636 (CCPA 1970)

Source Text from USPTO’s MPEP

This is an exact copy of the MPEP from the USPTO. It is here for your reference to see the section in context.

BlueIron Last Updated: 2025-12-31