MPEP § 2106.04(a) — Abstract Ideas (Annotated Rules)

§2106.04(a) Abstract Ideas

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

This page consolidates and annotates all enforceable requirements under MPEP § 2106.04(a), 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.

Abstract Ideas

This section addresses Abstract Ideas. Primary authority: 35 U.S.C. 101 and 37 CFR 101. Contains: 1 requirement and 7 other statements.

Key Rules

Topic

Patent Eligibility

10 rules
StatutoryInformativeAlways
[mpep-2106-04-a-88ee3451dce598d25e74af21]
Abstract Idea Exception Has Deep Roots In Supreme Court Jurisprudence
Note:
The rule states that the abstract idea exception is deeply rooted in the Supreme Court’s history and does not automatically exclude software or business methods from patent eligibility.

The abstract idea exception has deep roots in the Supreme Court’s jurisprudence. See Bilski v. Kappos, 561 U.S. 593, 601-602, 95 USPQ2d 1001, 1006 (2010) (citing Le Roy v. Tatham, 55 U.S. (14 How.) 156, 174–175 (1853)). Despite this long history, the courts have declined to define abstract ideas. However, it is clear from the body of judicial precedent that software and business methods are not excluded categories of subject matter. For example, the Supreme Court concluded that business methods are not “categorically outside of § 101's scope,” stating that “a business method is simply one kind of ‘method’ that is, at least in some circumstances, eligible for patenting under § 101.” Bilski, 561 U.S. at 607, 95 USPQ2d at 1008 (2010). See also Content Extraction and Transmission, LLC v. Wells Fargo Bank, 776 F.3d 1343, 1347, 113 USPQ2d 1354, 1357 (Fed. Cir. 2014) (“there is no categorical business-method exception”). Likewise, software is not automatically an abstract idea, even if performance of a software task involves an underlying mathematical calculation or relationship. See, e.g., Thales Visionix, Inc. v. United States, 850 F.3d 1343, 121 USPQ2d 1898, 1902 (Fed. Cir. 2017) (“That a mathematical equation is required to complete the claimed method and system does not doom the claims to abstraction.”); McRO, Inc. v. Bandai Namco Games Am. Inc., 837 F.3d 1299, 1316, 120 USPQ2d 1091, 1103 (Fed. Cir. 2016) (methods of automatic lip synchronization and facial expression animation using computer-implemented rules were not directed to an abstract idea); Enfish, 822 F.3d 1327, 1336, 118 USPQ2d 1684, 1689 (Fed. Cir. 2016) (claims to self-referential table for a computer database were not directed to an abstract idea).

Jump to MPEP Source · 37 CFR 101Patent Eligibility
StatutoryInformativeAlways
[mpep-2106-04-a-4913f90bab7555cacb27c5ce]
Abstract Idea Exceptions Not Categorical
Note:
The rule states that business methods and software are not automatically excluded from patent eligibility, even if they involve abstract ideas.

The abstract idea exception has deep roots in the Supreme Court’s jurisprudence. See Bilski v. Kappos, 561 U.S. 593, 601-602, 95 USPQ2d 1001, 1006 (2010) (citing Le Roy v. Tatham, 55 U.S. (14 How.) 156, 174–175 (1853)). Despite this long history, the courts have declined to define abstract ideas. However, it is clear from the body of judicial precedent that software and business methods are not excluded categories of subject matter. For example, the Supreme Court concluded that business methods are not “categorically outside of § 101's scope,” stating that “a business method is simply one kind of ‘method’ that is, at least in some circumstances, eligible for patenting under § 101.” Bilski, 561 U.S. at 607, 95 USPQ2d at 1008 (2010). See also Content Extraction and Transmission, LLC v. Wells Fargo Bank, 776 F.3d 1343, 1347, 113 USPQ2d 1354, 1357 (Fed. Cir. 2014) (“there is no categorical business-method exception”). Likewise, software is not automatically an abstract idea, even if performance of a software task involves an underlying mathematical calculation or relationship. See, e.g., Thales Visionix, Inc. v. United States, 850 F.3d 1343, 121 USPQ2d 1898, 1902 (Fed. Cir. 2017) (“That a mathematical equation is required to complete the claimed method and system does not doom the claims to abstraction.”); McRO, Inc. v. Bandai Namco Games Am. Inc., 837 F.3d 1299, 1316, 120 USPQ2d 1091, 1103 (Fed. Cir. 2016) (methods of automatic lip synchronization and facial expression animation using computer-implemented rules were not directed to an abstract idea); Enfish, 822 F.3d 1327, 1336, 118 USPQ2d 1684, 1689 (Fed. Cir. 2016) (claims to self-referential table for a computer database were not directed to an abstract idea).

Jump to MPEP Source · 37 CFR 101Patent Eligibility
StatutoryInformativeAlways
[mpep-2106-04-a-b8751be486390410eb5e8c2b]
Software and Business Methods Are Not Excluded From Patenting
Note:
The courts have not defined abstract ideas but have clarified that software and business methods are within the scope of patent eligibility.

The abstract idea exception has deep roots in the Supreme Court’s jurisprudence. See Bilski v. Kappos, 561 U.S. 593, 601-602, 95 USPQ2d 1001, 1006 (2010) (citing Le Roy v. Tatham, 55 U.S. (14 How.) 156, 174–175 (1853)). Despite this long history, the courts have declined to define abstract ideas. However, it is clear from the body of judicial precedent that software and business methods are not excluded categories of subject matter. For example, the Supreme Court concluded that business methods are not “categorically outside of § 101's scope,” stating that “a business method is simply one kind of ‘method’ that is, at least in some circumstances, eligible for patenting under § 101.” Bilski, 561 U.S. at 607, 95 USPQ2d at 1008 (2010). See also Content Extraction and Transmission, LLC v. Wells Fargo Bank, 776 F.3d 1343, 1347, 113 USPQ2d 1354, 1357 (Fed. Cir. 2014) (“there is no categorical business-method exception”). Likewise, software is not automatically an abstract idea, even if performance of a software task involves an underlying mathematical calculation or relationship. See, e.g., Thales Visionix, Inc. v. United States, 850 F.3d 1343, 121 USPQ2d 1898, 1902 (Fed. Cir. 2017) (“That a mathematical equation is required to complete the claimed method and system does not doom the claims to abstraction.”); McRO, Inc. v. Bandai Namco Games Am. Inc., 837 F.3d 1299, 1316, 120 USPQ2d 1091, 1103 (Fed. Cir. 2016) (methods of automatic lip synchronization and facial expression animation using computer-implemented rules were not directed to an abstract idea); Enfish, 822 F.3d 1327, 1336, 118 USPQ2d 1684, 1689 (Fed. Cir. 2016) (claims to self-referential table for a computer database were not directed to an abstract idea).

Jump to MPEP Source · 37 CFR 101Patent Eligibility
StatutoryInformativeAlways
[mpep-2106-04-a-dee7cbe75a022dcae3ea3e35]
Business Methods Not Excluded From Patenting
Note:
The Supreme Court has ruled that business methods are not categorically excluded from patent eligibility under §101, as long as they meet other patentability requirements.

The abstract idea exception has deep roots in the Supreme Court’s jurisprudence. See Bilski v. Kappos, 561 U.S. 593, 601-602, 95 USPQ2d 1001, 1006 (2010) (citing Le Roy v. Tatham, 55 U.S. (14 How.) 156, 174–175 (1853)). Despite this long history, the courts have declined to define abstract ideas. However, it is clear from the body of judicial precedent that software and business methods are not excluded categories of subject matter. For example, the Supreme Court concluded that business methods are not “categorically outside of § 101's scope,” stating that “a business method is simply one kind of ‘method’ that is, at least in some circumstances, eligible for patenting under § 101.” Bilski, 561 U.S. at 607, 95 USPQ2d at 1008 (2010). See also Content Extraction and Transmission, LLC v. Wells Fargo Bank, 776 F.3d 1343, 1347, 113 USPQ2d 1354, 1357 (Fed. Cir. 2014) (“there is no categorical business-method exception”). Likewise, software is not automatically an abstract idea, even if performance of a software task involves an underlying mathematical calculation or relationship. See, e.g., Thales Visionix, Inc. v. United States, 850 F.3d 1343, 121 USPQ2d 1898, 1902 (Fed. Cir. 2017) (“That a mathematical equation is required to complete the claimed method and system does not doom the claims to abstraction.”); McRO, Inc. v. Bandai Namco Games Am. Inc., 837 F.3d 1299, 1316, 120 USPQ2d 1091, 1103 (Fed. Cir. 2016) (methods of automatic lip synchronization and facial expression animation using computer-implemented rules were not directed to an abstract idea); Enfish, 822 F.3d 1327, 1336, 118 USPQ2d 1684, 1689 (Fed. Cir. 2016) (claims to self-referential table for a computer database were not directed to an abstract idea).

Jump to MPEP Source · 37 CFR 101Patent Eligibility
StatutoryInformativeAlways
[mpep-2106-04-a-4959d131f26e0f7ceb4fea3d]
Business Methods Not Excluded From Patenting
Note:
The rule states that business methods are not categorically excluded from patent eligibility, aligning with the abstract idea exception in patent law.

The abstract idea exception has deep roots in the Supreme Court’s jurisprudence. See Bilski v. Kappos, 561 U.S. 593, 601-602, 95 USPQ2d 1001, 1006 (2010) (citing Le Roy v. Tatham, 55 U.S. (14 How.) 156, 174–175 (1853)). Despite this long history, the courts have declined to define abstract ideas. However, it is clear from the body of judicial precedent that software and business methods are not excluded categories of subject matter. For example, the Supreme Court concluded that business methods are not “categorically outside of § 101's scope,” stating that “a business method is simply one kind of ‘method’ that is, at least in some circumstances, eligible for patenting under § 101.” Bilski, 561 U.S. at 607, 95 USPQ2d at 1008 (2010). See also Content Extraction and Transmission, LLC v. Wells Fargo Bank, 776 F.3d 1343, 1347, 113 USPQ2d 1354, 1357 (Fed. Cir. 2014) (“there is no categorical business-method exception”). Likewise, software is not automatically an abstract idea, even if performance of a software task involves an underlying mathematical calculation or relationship. See, e.g., Thales Visionix, Inc. v. United States, 850 F.3d 1343, 121 USPQ2d 1898, 1902 (Fed. Cir. 2017) (“That a mathematical equation is required to complete the claimed method and system does not doom the claims to abstraction.”); McRO, Inc. v. Bandai Namco Games Am. Inc., 837 F.3d 1299, 1316, 120 USPQ2d 1091, 1103 (Fed. Cir. 2016) (methods of automatic lip synchronization and facial expression animation using computer-implemented rules were not directed to an abstract idea); Enfish, 822 F.3d 1327, 1336, 118 USPQ2d 1684, 1689 (Fed. Cir. 2016) (claims to self-referential table for a computer database were not directed to an abstract idea).

Jump to MPEP Source · 37 CFR 101Patent Eligibility
StatutoryInformativeAlways
[mpep-2106-04-a-9ee4283f2058e3635f50c543]
Software Is Not Automatically an Abstract Idea
Note:
The rule states that software tasks involving mathematical calculations are not automatically considered abstract ideas, emphasizing the need to assess their patent eligibility on a case-by-case basis.

The abstract idea exception has deep roots in the Supreme Court’s jurisprudence. See Bilski v. Kappos, 561 U.S. 593, 601-602, 95 USPQ2d 1001, 1006 (2010) (citing Le Roy v. Tatham, 55 U.S. (14 How.) 156, 174–175 (1853)). Despite this long history, the courts have declined to define abstract ideas. However, it is clear from the body of judicial precedent that software and business methods are not excluded categories of subject matter. For example, the Supreme Court concluded that business methods are not “categorically outside of § 101's scope,” stating that “a business method is simply one kind of ‘method’ that is, at least in some circumstances, eligible for patenting under § 101.” Bilski, 561 U.S. at 607, 95 USPQ2d at 1008 (2010). See also Content Extraction and Transmission, LLC v. Wells Fargo Bank, 776 F.3d 1343, 1347, 113 USPQ2d 1354, 1357 (Fed. Cir. 2014) (“there is no categorical business-method exception”). Likewise, software is not automatically an abstract idea, even if performance of a software task involves an underlying mathematical calculation or relationship. See, e.g., Thales Visionix, Inc. v. United States, 850 F.3d 1343, 121 USPQ2d 1898, 1902 (Fed. Cir. 2017) (“That a mathematical equation is required to complete the claimed method and system does not doom the claims to abstraction.”); McRO, Inc. v. Bandai Namco Games Am. Inc., 837 F.3d 1299, 1316, 120 USPQ2d 1091, 1103 (Fed. Cir. 2016) (methods of automatic lip synchronization and facial expression animation using computer-implemented rules were not directed to an abstract idea); Enfish, 822 F.3d 1327, 1336, 118 USPQ2d 1684, 1689 (Fed. Cir. 2016) (claims to self-referential table for a computer database were not directed to an abstract idea).

Jump to MPEP Source · 37 CFR 101Patent Eligibility
StatutoryRequiredAlways
[mpep-2106-04-a-af11df6c1ab9c5614bda7a49]
Software and Business Methods Are Not Automatically Abstract
Note:
The rule states that software and business methods are not automatically considered abstract ideas, even if they involve mathematical calculations.

The abstract idea exception has deep roots in the Supreme Court’s jurisprudence. See Bilski v. Kappos, 561 U.S. 593, 601-602, 95 USPQ2d 1001, 1006 (2010) (citing Le Roy v. Tatham, 55 U.S. (14 How.) 156, 174–175 (1853)). Despite this long history, the courts have declined to define abstract ideas. However, it is clear from the body of judicial precedent that software and business methods are not excluded categories of subject matter. For example, the Supreme Court concluded that business methods are not “categorically outside of § 101's scope,” stating that “a business method is simply one kind of ‘method’ that is, at least in some circumstances, eligible for patenting under § 101.” Bilski, 561 U.S. at 607, 95 USPQ2d at 1008 (2010). See also Content Extraction and Transmission, LLC v. Wells Fargo Bank, 776 F.3d 1343, 1347, 113 USPQ2d 1354, 1357 (Fed. Cir. 2014) (“there is no categorical business-method exception”). Likewise, software is not automatically an abstract idea, even if performance of a software task involves an underlying mathematical calculation or relationship. See, e.g., Thales Visionix, Inc. v. United States, 850 F.3d 1343, 121 USPQ2d 1898, 1902 (Fed. Cir. 2017) (“That a mathematical equation is required to complete the claimed method and system does not doom the claims to abstraction.”); McRO, Inc. v. Bandai Namco Games Am. Inc., 837 F.3d 1299, 1316, 120 USPQ2d 1091, 1103 (Fed. Cir. 2016) (methods of automatic lip synchronization and facial expression animation using computer-implemented rules were not directed to an abstract idea); Enfish, 822 F.3d 1327, 1336, 118 USPQ2d 1684, 1689 (Fed. Cir. 2016) (claims to self-referential table for a computer database were not directed to an abstract idea).

Jump to MPEP Source · 37 CFR 101Patent Eligibility
StatutoryInformativeAlways
[mpep-2106-04-a-27df9b3a40a032e287c8af71]
Claim Not Reciting Abstract Idea Unless Exception
Note:
If the claim limitations do not fall under abstract ideas, it is not an abstract idea unless another exception applies as discussed in MPEP § 2106.04(a)(3).

If the identified limitation(s) do not fall within any of the groupings of abstract ideas, it is reasonable to find that the claim does not recite an abstract idea. This concludes the abstract idea judicial exception eligibility analysis, except in the rare circumstance discussed in MPEP § 2106.04(a)(3), below. The claim is thus eligible at Pathway B unless the claim recites, and is directed to, another exception (such as a law of nature or natural phenomenon).

Jump to MPEP SourcePatent Eligibility
StatutoryInformativeAlways
[mpep-2106-04-a-7ba5fbc55eb205d249eeab8a]
Claim Not Directed to Abstract Idea
Note:
The claim is eligible at Pathway B unless it recites and is directed to an abstract idea such as a law of nature or natural phenomenon.

If the identified limitation(s) do not fall within any of the groupings of abstract ideas, it is reasonable to find that the claim does not recite an abstract idea. This concludes the abstract idea judicial exception eligibility analysis, except in the rare circumstance discussed in MPEP § 2106.04(a)(3), below. The claim is thus eligible at Pathway B unless the claim recites, and is directed to, another exception (such as a law of nature or natural phenomenon).

Jump to MPEP SourcePatent Eligibility
StatutoryInformativeAlways
[mpep-2106-04-a-eec9b80c71aae6915da934a1]
Examples of Claims Not Reciting Abstract Ideas
Note:
Provides examples where claims do not recite abstract ideas and are eligible at Step 2A Prong One.

MPEP § 2106.04(a)(1) provides examples of claims that do not recite abstract ideas (or other judicial exceptions) and thus are eligible at Step 2A Prong One.

Jump to MPEP SourcePatent Eligibility

Citations

Primary topicCitation
Patent Eligibility35 U.S.C. § 101
Patent EligibilityMPEP § 2106.04(a)(1)
MPEP § 2106.04(a)(2)
Patent EligibilityMPEP § 2106.04(a)(3)
MPEP § 2106.04(b)
MPEP § 2106.04(d)
Patent EligibilitySee also Content Extraction and Transmission, LLC v. Wells Fargo Bank, 776 F.3d 1343, 1347, 113 USPQ2d 1354, 1357 (Fed. Cir. 2014)
Patent EligibilityThales Visionix, Inc. v. United States, 850 F.3d 1343, 121 USPQ2d 1898, 1902 (Fed. Cir. 2017)

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