MPEP § 2131.05 — Nonanalogous or Disparaging Prior Art (Annotated Rules)

§2131.05 Nonanalogous or Disparaging Prior Art

USPTO MPEP version: BlueIron's Update: 2026-01-10

This page consolidates and annotates all enforceable requirements under MPEP § 2131.05, 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.

Nonanalogous or Disparaging Prior Art

This section addresses Nonanalogous or Disparaging Prior Art. Primary authority: 35 U.S.C. 102. Contains: 1 permission and 5 other statements.

Key Rules

Topic

Nonanalogous or Disparaging Prior Art (MPEP 2131.05)

2 rules
StatutoryInformativeAlways
[mpep-2131-05-c04a2edcbb039e9951ff6425]
Nonanalogous Prior Art Does Not Invalidate Section 102 Rejection
Note:
The rejection of a claim under section 102 cannot be overcome by arguing that the prior art is nonanalogous or teaches away from the invention.

“Arguments that the alleged anticipatory prior art is ‘nonanalogous art’ or ‘teaches away from the invention’ or is not recognized as solving the problem solved by the claimed invention, [are] not ‘germane’ to a rejection under section 102.” Twin Disc, Inc. v. United States, 231 USPQ 417, 424 (Cl. Ct. 1986) (quoting In re Self, 671 F.2d 1344, 213 USPQ 1, 7 (CCPA 1982)). See also State Contracting & Eng’ g Corp. v. Condotte America, Inc., 346 F.3d 1057, 1068, 68 USPQ2d 1481, 1488 (Fed. Cir. 2003) (The question of whether a reference is analogous art is not relevant to whether that reference anticipates. A reference may be directed to an entirely different problem than the one addressed by the inventor, or may be from an entirely different field of endeavor than that of the claimed invention, yet the reference is still anticipatory if it explicitly or inherently discloses every limitation recited in the claims.).

Jump to MPEP SourceNonanalogous or Disparaging Prior Art (MPEP 2131.05)Accidental AnticipationInherent Feature in Prior Art
StatutoryInformativeAlways
[mpep-2131-05-abc5c638482ed6e03bb415ea]
Nonanalogous Reference Can Still Anticipate
Note:
A reference that is not analogous to the claimed invention can still anticipate if it discloses all claim limitations.

“Arguments that the alleged anticipatory prior art is ‘nonanalogous art’ or ‘teaches away from the invention’ or is not recognized as solving the problem solved by the claimed invention, [are] not ‘germane’ to a rejection under section 102.” Twin Disc, Inc. v. United States, 231 USPQ 417, 424 (Cl. Ct. 1986) (quoting In re Self, 671 F.2d 1344, 213 USPQ 1, 7 (CCPA 1982)). See also State Contracting & Eng’ g Corp. v. Condotte America, Inc., 346 F.3d 1057, 1068, 68 USPQ2d 1481, 1488 (Fed. Cir. 2003) (The question of whether a reference is analogous art is not relevant to whether that reference anticipates. A reference may be directed to an entirely different problem than the one addressed by the inventor, or may be from an entirely different field of endeavor than that of the claimed invention, yet the reference is still anticipatory if it explicitly or inherently discloses every limitation recited in the claims.).

Jump to MPEP SourceNonanalogous or Disparaging Prior Art (MPEP 2131.05)Accidental AnticipationInherent Feature in Prior Art
Topic

Disparaging or Teaching Away

2 rules
MPEP GuidanceInformativeAlways
[mpep-2131-05-5dcd44086e1b5435c06d1498]
Disparagement Does Not Invalidate Anticipation
Note:
A reference that disparages the invention still counts as anticipatory if it discloses the invention, regardless of any negative comments.

A reference is no less anticipatory if, after disclosing the invention, the reference then disparages it. The question whether a reference “teaches away” from the invention is inapplicable to an anticipation analysis. Celeritas Technologies Ltd. v. Rockwell International Corp., 150 F.3d 1354, 1361, 47 USPQ2d 1516, 1522-23 (Fed. Cir. 1998) (The prior art was held to anticipate the claims even though it taught away from the claimed invention. “The fact that a modem with a single carrier data signal is shown to be less than optimal does not vitiate the fact that it is disclosed.”). See Upsher-Smith Labs. v. Pamlab, LLC, 412 F.3d 1319, 1323, 75 USPQ2d 1213, 1215 (Fed. Cir. 2005)(claimed composition that expressly excluded an ingredient held anticipated by reference composition that optionally included that same ingredient); see also Atlas Powder Co. v. IRECO, Inc., 190 F.3d 1342, 1349, 51 USPQ2d 1943, 1948 (Fed. Cir. 1999) (Claimed composition was anticipated by prior art reference that inherently met claim limitation of “sufficient aeration” even though reference taught away from air entrapment or purposeful aeration.).

Jump to MPEP SourceDisparaging or Teaching AwayNonanalogous Art in AnticipationNonanalogous or Disparaging Prior Art (MPEP 2131.05)
MPEP GuidanceInformativeAlways
[mpep-2131-05-a772f18f8cbf3f9b13227f8f]
Disparaging Reference Does Not Invalidate Anticipation
Note:
A reference that disparages the invention still anticipates it if it discloses all claim limitations.

A reference is no less anticipatory if, after disclosing the invention, the reference then disparages it. The question whether a reference “teaches away” from the invention is inapplicable to an anticipation analysis. Celeritas Technologies Ltd. v. Rockwell International Corp., 150 F.3d 1354, 1361, 47 USPQ2d 1516, 1522-23 (Fed. Cir. 1998) (The prior art was held to anticipate the claims even though it taught away from the claimed invention. “The fact that a modem with a single carrier data signal is shown to be less than optimal does not vitiate the fact that it is disclosed.”). See Upsher-Smith Labs. v. Pamlab, LLC, 412 F.3d 1319, 1323, 75 USPQ2d 1213, 1215 (Fed. Cir. 2005)(claimed composition that expressly excluded an ingredient held anticipated by reference composition that optionally included that same ingredient); see also Atlas Powder Co. v. IRECO, Inc., 190 F.3d 1342, 1349, 51 USPQ2d 1943, 1948 (Fed. Cir. 1999) (Claimed composition was anticipated by prior art reference that inherently met claim limitation of “sufficient aeration” even though reference taught away from air entrapment or purposeful aeration.).

Jump to MPEP SourceDisparaging or Teaching AwayNonanalogous or Disparaging Prior Art (MPEP 2131.05)Anticipation/Novelty
Topic

Accidental Anticipation

1 rules
StatutoryInformativeAlways
[mpep-2131-05-9f9200851faf9f9e254f8189]
Nonanalogous Prior Art Not Relevant to Anticipation
Note:
The argument that prior art is nonanalogous, teaches away from the invention, or does not solve the same problem as the claimed invention is not relevant when determining if it anticipates the claims.

“Arguments that the alleged anticipatory prior art is ‘nonanalogous art’ or ‘teaches away from the invention’ or is not recognized as solving the problem solved by the claimed invention, [are] not ‘germane’ to a rejection under section 102.” Twin Disc, Inc. v. United States, 231 USPQ 417, 424 (Cl. Ct. 1986) (quoting In re Self, 671 F.2d 1344, 213 USPQ 1, 7 (CCPA 1982)). See also State Contracting & Eng’ g Corp. v. Condotte America, Inc., 346 F.3d 1057, 1068, 68 USPQ2d 1481, 1488 (Fed. Cir. 2003) (The question of whether a reference is analogous art is not relevant to whether that reference anticipates. A reference may be directed to an entirely different problem than the one addressed by the inventor, or may be from an entirely different field of endeavor than that of the claimed invention, yet the reference is still anticipatory if it explicitly or inherently discloses every limitation recited in the claims.).

Jump to MPEP SourceAccidental AnticipationDisparaging or Teaching AwayNonanalogous Art in Anticipation
Topic

Inherent Feature in Prior Art

1 rules
StatutoryPermittedAlways
[mpep-2131-05-8f5ffba3e9557c9a40882062]
Different Problem, Same Solution
Note:
A reference can anticipate a claim even if it addresses a different problem and comes from a different field as long as it explicitly or inherently discloses all claim limitations.

“Arguments that the alleged anticipatory prior art is ‘nonanalogous art’ or ‘teaches away from the invention’ or is not recognized as solving the problem solved by the claimed invention, [are] not ‘germane’ to a rejection under section 102.” Twin Disc, Inc. v. United States, 231 USPQ 417, 424 (Cl. Ct. 1986) (quoting In re Self, 671 F.2d 1344, 213 USPQ 1, 7 (CCPA 1982)). See also State Contracting & Eng’ g Corp. v. Condotte America, Inc., 346 F.3d 1057, 1068, 68 USPQ2d 1481, 1488 (Fed. Cir. 2003) (The question of whether a reference is analogous art is not relevant to whether that reference anticipates. A reference may be directed to an entirely different problem than the one addressed by the inventor, or may be from an entirely different field of endeavor than that of the claimed invention, yet the reference is still anticipatory if it explicitly or inherently discloses every limitation recited in the claims.).

Jump to MPEP SourceInherent Feature in Prior ArtNonanalogous Art in AnticipationAnticipation by Inherency (MPEP 2112)
Topic

Anticipation/Novelty

1 rules
MPEP GuidanceInformativeAlways
[mpep-2131-05-f0221195d048f2588ca71124]
Nonanalogous Prior Art Can Still Anticipate
Note:
The prior art can still anticipate claims even if it disparages the invention, as long as it discloses all claim elements.

A reference is no less anticipatory if, after disclosing the invention, the reference then disparages it. The question whether a reference “teaches away” from the invention is inapplicable to an anticipation analysis. Celeritas Technologies Ltd. v. Rockwell International Corp., 150 F.3d 1354, 1361, 47 USPQ2d 1516, 1522-23 (Fed. Cir. 1998) (The prior art was held to anticipate the claims even though it taught away from the claimed invention. “The fact that a modem with a single carrier data signal is shown to be less than optimal does not vitiate the fact that it is disclosed.”). See Upsher-Smith Labs. v. Pamlab, LLC, 412 F.3d 1319, 1323, 75 USPQ2d 1213, 1215 (Fed. Cir. 2005)(claimed composition that expressly excluded an ingredient held anticipated by reference composition that optionally included that same ingredient); see also Atlas Powder Co. v. IRECO, Inc., 190 F.3d 1342, 1349, 51 USPQ2d 1943, 1948 (Fed. Cir. 1999) (Claimed composition was anticipated by prior art reference that inherently met claim limitation of “sufficient aeration” even though reference taught away from air entrapment or purposeful aeration.).

Jump to MPEP SourceAnticipation/NoveltyNonanalogous Art in AnticipationNonanalogous or Disparaging Prior Art (MPEP 2131.05)
Topic

35 U.S.C. 102 – Novelty / Prior Art

1 rules
MPEP GuidanceInformativeAlways
[mpep-2131-05-31215ef685779b91da624e63]
Disclosure Is Not Vitiated by Disparagement
Note:
A reference that discloses an invention but disparages it does not lose its anticipatory power. The fact that a disclosed feature is less than optimal does not negate its disclosure.

A reference is no less anticipatory if, after disclosing the invention, the reference then disparages it. The question whether a reference “teaches away” from the invention is inapplicable to an anticipation analysis. Celeritas Technologies Ltd. v. Rockwell International Corp., 150 F.3d 1354, 1361, 47 USPQ2d 1516, 1522-23 (Fed. Cir. 1998) (The prior art was held to anticipate the claims even though it taught away from the claimed invention. “The fact that a modem with a single carrier data signal is shown to be less than optimal does not vitiate the fact that it is disclosed.”). See Upsher-Smith Labs. v. Pamlab, LLC, 412 F.3d 1319, 1323, 75 USPQ2d 1213, 1215 (Fed. Cir. 2005)(claimed composition that expressly excluded an ingredient held anticipated by reference composition that optionally included that same ingredient); see also Atlas Powder Co. v. IRECO, Inc., 190 F.3d 1342, 1349, 51 USPQ2d 1943, 1948 (Fed. Cir. 1999) (Claimed composition was anticipated by prior art reference that inherently met claim limitation of “sufficient aeration” even though reference taught away from air entrapment or purposeful aeration.).

Jump to MPEP SourceNovelty / Prior ArtNonanalogous Art in AnticipationNonanalogous or Disparaging Prior Art (MPEP 2131.05)

Citations

Primary topicCitation
Accidental Anticipation
Inherent Feature in Prior Art
Nonanalogous or Disparaging Prior Art (MPEP 2131.05)
In re Self, 671 F.2d 1344, 213 USPQ 1, 7 (CCPA 1982)
35 U.S.C. 102 – Novelty / Prior Art
Anticipation/Novelty
Disparaging or Teaching Away
see also Atlas Powder Co. v. IRECO, Inc., 190 F.3d 1342, 1349, 51 USPQ2d 1943, 1948 (Fed. Cir. 1999)

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: 2026-01-10