MPEP § 2105 — Patent Eligible Subject Matter — Living Subject Matter (Annotated Rules)

§2105 Patent Eligible Subject Matter — Living Subject Matter

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

This page consolidates and annotates all enforceable requirements under MPEP § 2105, 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.

Patent Eligible Subject Matter — Living Subject Matter

This section addresses Patent Eligible Subject Matter — Living Subject Matter. Primary authority: 35 U.S.C. 33, 35 U.S.C. 101, and 35 U.S.C. 161. Contains: 1 requirement, 1 guidance statement, 2 permissions, and 10 other statements.

Key Rules

Topic

Patent Eligibility

18 rules
StatutoryInformativeAlways
[mpep-2105-fc02904b5da819f4533c3025]
Living Subject Matter Is Patentable
Note:
The Supreme Court held that genetically engineered living organisms, with markedly different characteristics from natural ones, are eligible for patent protection under 35 U.S.C. 101.

In Chakrabarty, the Supreme Court held that a claim to a genetically engineered bacterium was directed to at least one of the four statutory categories, because the bacterium was a “manufacture” and/or a “composition of matter.” In its opinion, the Court stated that “Congress plainly contemplated that the patent laws would be given wide scope” because it chose to draft 35 U.S.C. 101 using “such expansive terms as ‘manufacture’ and ‘composition of matter,’ modified by the comprehensive ‘any.’” 447 U.S. at 308, 206 USPQ at 197. The Court also determined that the distinction between living and inanimate things was not relevant for subject matter eligibility. 447 U.S. at 313, 206 USPQ at 199. Thus, the Court held that living subject matter with markedly different characteristics from any found in nature, such as the claimed bacterium produced by genetic engineering, is not excluded from patent protection by 35 U.S.C. 101. 447 U.S. at 310, 206 USPQ at 197.

Jump to MPEP SourcePatent EligibilityComposition of Matter
StatutoryInformativeAlways
[mpep-2105-2a29b2cb83632092367147db]
Living Things Not Excluded From Patent Protection
Note:
The Court determined that living organisms, even those with markedly different characteristics from natural ones, are not excluded from patent protection under subject matter eligibility.

In Chakrabarty, the Supreme Court held that a claim to a genetically engineered bacterium was directed to at least one of the four statutory categories, because the bacterium was a “manufacture” and/or a “composition of matter.” In its opinion, the Court stated that “Congress plainly contemplated that the patent laws would be given wide scope” because it chose to draft 35 U.S.C. 101 using “such expansive terms as ‘manufacture’ and ‘composition of matter,’ modified by the comprehensive ‘any.’” 447 U.S. at 308, 206 USPQ at 197. The Court also determined that the distinction between living and inanimate things was not relevant for subject matter eligibility. 447 U.S. at 313, 206 USPQ at 199. Thus, the Court held that living subject matter with markedly different characteristics from any found in nature, such as the claimed bacterium produced by genetic engineering, is not excluded from patent protection by 35 U.S.C. 101. 447 U.S. at 310, 206 USPQ at 197.

Jump to MPEP SourcePatent EligibilityComposition of Matter
StatutoryInformativeAlways
[mpep-2105-959d8a0130607d71f818e186]
Patent Eligible Living Subject Matter Determined
Note:
The Supreme Court ruled that genetically engineered living organisms, with markedly different characteristics from natural ones, are patent eligible under 35 U.S.C. 101.

In Chakrabarty, the Supreme Court held that a claim to a genetically engineered bacterium was directed to at least one of the four statutory categories, because the bacterium was a “manufacture” and/or a “composition of matter.” In its opinion, the Court stated that “Congress plainly contemplated that the patent laws would be given wide scope” because it chose to draft 35 U.S.C. 101 using “such expansive terms as ‘manufacture’ and ‘composition of matter,’ modified by the comprehensive ‘any.’” 447 U.S. at 308, 206 USPQ at 197. The Court also determined that the distinction between living and inanimate things was not relevant for subject matter eligibility. 447 U.S. at 313, 206 USPQ at 199. Thus, the Court held that living subject matter with markedly different characteristics from any found in nature, such as the claimed bacterium produced by genetic engineering, is not excluded from patent protection by 35 U.S.C. 101. 447 U.S. at 310, 206 USPQ at 197.

Jump to MPEP SourcePatent EligibilityComposition of Matter
StatutoryInformativeAlways
[mpep-2105-d1af34370dcb3b64473afd8d]
Non-Naturally Occurring Animals Are Patentable
Note:
The Patent and Trademark Office now considers non-naturally occurring, non-human multicellular living organisms, including animals, to be patentable subject matter under 35 U.S.C. 101.

Following the reasoning in Chakrabarty, the Board of Patent Appeals and Interferences determined that animals are patentable subject matter under 35 U.S.C. 101. In Ex parte Allen, 2 USPQ2d 1425 (Bd. Pat. App. & Inter. 1987), the Board decided that a non-naturally occurring polyploid Pacific coast oyster could have been the proper subject of a patent under 35 U.S.C. 101 if all the criteria for patentability were satisfied. Shortly after the Allen decision, the Commissioner of Patents and Trademarks issued a notice (Animals – Patentability, 1077 O.G. 24, April 21, 1987) stating that the Patent and Trademark Office “now considers nonnaturally occurring, non-human multicellular living organisms, including animals, to be patentable subject matter within the scope of 35 U.S.C. 101.”

Jump to MPEP SourcePatent EligibilityPTAB JurisdictionPTAB Contested Case Procedures
StatutoryInformativeAlways
[mpep-2105-f165e7b2cc969ac8d6281d50]
Patentable Subject Matter Includes New Plant Breeds
Note:
The Supreme Court ruled that newly developed plant breeds are patentable under 35 U.S.C. 101, despite other available protections like the Plant Patent Act and Plant Variety Protection Act.

With respect to plant subject matter, the Supreme Court held that patentable subject matter under 35 U.S.C. 101 includes newly developed plant breeds, even though plant protection is also available under the Plant Patent Act (35 U.S.C. 161 – 164) and the Plant Variety Protection Act (7 U.S.C. 2321 et. seq.). J.E.M. Ag Supply, Inc. v. Pioneer Hi-Bred Int’ l, Inc., 534 U.S. 124, 143-46, 60 USPQ2d 1865, 1874 (2001) (The scope of coverage of 35 U.S.C. 101 is not limited by the Plant Patent Act or the Plant Variety Protection Act; each statute can be regarded as effective because of its different requirements and protections).

Jump to MPEP SourcePatent EligibilityPlant Patent Subject MatterPlant Patent Practice
StatutoryPermittedAlways
[mpep-2105-f1069a2902dddceba6f23e54]
Patentable Subject Matter Not Limited by Plant Acts
Note:
The scope of patentable subject matter under 35 U.S.C. 101 is not restricted by the Plant Patent Act or the Plant Variety Protection Act, each providing different protections and requirements.

With respect to plant subject matter, the Supreme Court held that patentable subject matter under 35 U.S.C. 101 includes newly developed plant breeds, even though plant protection is also available under the Plant Patent Act (35 U.S.C. 161 – 164) and the Plant Variety Protection Act (7 U.S.C. 2321 et. seq.). J.E.M. Ag Supply, Inc. v. Pioneer Hi-Bred Int’ l, Inc., 534 U.S. 124, 143-46, 60 USPQ2d 1865, 1874 (2001) (The scope of coverage of 35 U.S.C. 101 is not limited by the Plant Patent Act or the Plant Variety Protection Act; each statute can be regarded as effective because of its different requirements and protections).

Jump to MPEP SourcePatent EligibilityPlant Patent Practice
StatutoryInformativeAlways
[mpep-2105-38ce2fe28a4e5c80674d3622]
Categories of Statutory Subject Matter Required
Note:
The rule requires that patent applications must include descriptions and claims within the categories of statutory subject matter as discussed in MPEP § 2106.03.

See MPEP § 2106.03 for a discussion of the categories of statutory subject matter.

Jump to MPEP SourcePatent Eligibility
StatutoryInformativeAlways
[mpep-2105-fd4a2fa2602ff7037e123be2]
Chakrabarty Is Central to Nature-Based Product Eligibility
Note:
The Supreme Court’s Chakrabarty decision is crucial for determining the patent eligibility of nature-based products.

Subsequent judicial decisions have made clear that the Supreme Court’s decision in Chakrabarty is “central” to the eligibility inquiry with respect to nature-based products. See, e.g., Association for Molecular Pathology v. Myriad Genetics, Inc., 569 U.S. 576, 590, 106 USPQ2d 1972, 1979 (2013). For example, the Federal Circuit has indicated that “discoveries that possess ‘markedly different characteristics from any found in nature,’ … are eligible for patent protection.” In re Roslin Institute (Edinburgh), 750 F.3d 1333, 1336, 110 USPQ2d 1668, 1671 (Fed. Cir. 2014) (quoting Chakrabarty, 447 U.S. at 310, 206 USPQ2d at 197). In Roslin, the claimed invention was a live-born clone of a pre-existing, non-embryonic, donor mammal selected from cattle, sheep, pigs, and goats. An embodiment of the claimed invention was the famous Dolly the Sheep, which the court stated was “the first mammal ever cloned from an adult somatic cell.” Despite acknowledging that the method used to create the claimed clones “constituted a breakthrough in scientific discovery”, the court relied on Chakrabarty in holding the claims ineligible because “Dolly herself is an exact genetic replica of another sheep and does not possess ‘markedly different characteristics from any [farm animals] found in nature.’” Roslin, 750 F.3d at 1337, 110 USPQ2d at 1671.

Jump to MPEP SourcePatent Eligibility
StatutoryInformativeAlways
[mpep-2105-2163404b7a88001f37ee7164]
Nature-Based Products Must Have Markedly Different Characteristics
Note:
The claimed invention must possess markedly different characteristics from any found in nature to be eligible for patent protection.

Subsequent judicial decisions have made clear that the Supreme Court’s decision in Chakrabarty is “central” to the eligibility inquiry with respect to nature-based products. See, e.g., Association for Molecular Pathology v. Myriad Genetics, Inc., 569 U.S. 576, 590, 106 USPQ2d 1972, 1979 (2013). For example, the Federal Circuit has indicated that “discoveries that possess ‘markedly different characteristics from any found in nature,’ … are eligible for patent protection.” In re Roslin Institute (Edinburgh), 750 F.3d 1333, 1336, 110 USPQ2d 1668, 1671 (Fed. Cir. 2014) (quoting Chakrabarty, 447 U.S. at 310, 206 USPQ2d at 197). In Roslin, the claimed invention was a live-born clone of a pre-existing, non-embryonic, donor mammal selected from cattle, sheep, pigs, and goats. An embodiment of the claimed invention was the famous Dolly the Sheep, which the court stated was “the first mammal ever cloned from an adult somatic cell.” Despite acknowledging that the method used to create the claimed clones “constituted a breakthrough in scientific discovery”, the court relied on Chakrabarty in holding the claims ineligible because “Dolly herself is an exact genetic replica of another sheep and does not possess ‘markedly different characteristics from any [farm animals] found in nature.’” Roslin, 750 F.3d at 1337, 110 USPQ2d at 1671.

Jump to MPEP SourcePatent Eligibility
StatutoryInformativeAlways
[mpep-2105-2c56a4c616f9b1fd31558ee8]
Nature-Based Products Must Possess Markedly Different Characteristics
Note:
Patent claims for nature-based products are eligible if they possess markedly different characteristics from any found in nature.

Subsequent judicial decisions have made clear that the Supreme Court’s decision in Chakrabarty is “central” to the eligibility inquiry with respect to nature-based products. See, e.g., Association for Molecular Pathology v. Myriad Genetics, Inc., 569 U.S. 576, 590, 106 USPQ2d 1972, 1979 (2013). For example, the Federal Circuit has indicated that “discoveries that possess ‘markedly different characteristics from any found in nature,’ … are eligible for patent protection.” In re Roslin Institute (Edinburgh), 750 F.3d 1333, 1336, 110 USPQ2d 1668, 1671 (Fed. Cir. 2014) (quoting Chakrabarty, 447 U.S. at 310, 206 USPQ2d at 197). In Roslin, the claimed invention was a live-born clone of a pre-existing, non-embryonic, donor mammal selected from cattle, sheep, pigs, and goats. An embodiment of the claimed invention was the famous Dolly the Sheep, which the court stated was “the first mammal ever cloned from an adult somatic cell.” Despite acknowledging that the method used to create the claimed clones “constituted a breakthrough in scientific discovery”, the court relied on Chakrabarty in holding the claims ineligible because “Dolly herself is an exact genetic replica of another sheep and does not possess ‘markedly different characteristics from any [farm animals] found in nature.’” Roslin, 750 F.3d at 1337, 110 USPQ2d at 1671.

Jump to MPEP SourcePatent Eligibility
StatutoryInformativeAlways
[mpep-2105-173a505118f4e230ad03be57]
Live-Born Clones Must Not Have Markedly Different Characteristics from Nature
Note:
The claimed live-born clones must not possess characteristics that are markedly different from those found in nature to be patent eligible.

Subsequent judicial decisions have made clear that the Supreme Court’s decision in Chakrabarty is “central” to the eligibility inquiry with respect to nature-based products. See, e.g., Association for Molecular Pathology v. Myriad Genetics, Inc., 569 U.S. 576, 590, 106 USPQ2d 1972, 1979 (2013). For example, the Federal Circuit has indicated that “discoveries that possess ‘markedly different characteristics from any found in nature,’ … are eligible for patent protection.” In re Roslin Institute (Edinburgh), 750 F.3d 1333, 1336, 110 USPQ2d 1668, 1671 (Fed. Cir. 2014) (quoting Chakrabarty, 447 U.S. at 310, 206 USPQ2d at 197). In Roslin, the claimed invention was a live-born clone of a pre-existing, non-embryonic, donor mammal selected from cattle, sheep, pigs, and goats. An embodiment of the claimed invention was the famous Dolly the Sheep, which the court stated was “the first mammal ever cloned from an adult somatic cell.” Despite acknowledging that the method used to create the claimed clones “constituted a breakthrough in scientific discovery”, the court relied on Chakrabarty in holding the claims ineligible because “Dolly herself is an exact genetic replica of another sheep and does not possess ‘markedly different characteristics from any [farm animals] found in nature.’” Roslin, 750 F.3d at 1337, 110 USPQ2d at 1671.

Jump to MPEP SourcePatent Eligibility
StatutoryInformativeAlways
[mpep-2105-0a7dd7f227190bd0d79802ea]
Cloned Mammals Are Not Patentable
Note:
The court held that cloned mammals, being exact genetic replicas of existing animals, do not possess markedly different characteristics and are therefore ineligible for patent protection.

Subsequent judicial decisions have made clear that the Supreme Court’s decision in Chakrabarty is “central” to the eligibility inquiry with respect to nature-based products. See, e.g., Association for Molecular Pathology v. Myriad Genetics, Inc., 569 U.S. 576, 590, 106 USPQ2d 1972, 1979 (2013). For example, the Federal Circuit has indicated that “discoveries that possess ‘markedly different characteristics from any found in nature,’ … are eligible for patent protection.” In re Roslin Institute (Edinburgh), 750 F.3d 1333, 1336, 110 USPQ2d 1668, 1671 (Fed. Cir. 2014) (quoting Chakrabarty, 447 U.S. at 310, 206 USPQ2d at 197). In Roslin, the claimed invention was a live-born clone of a pre-existing, non-embryonic, donor mammal selected from cattle, sheep, pigs, and goats. An embodiment of the claimed invention was the famous Dolly the Sheep, which the court stated was “the first mammal ever cloned from an adult somatic cell.” Despite acknowledging that the method used to create the claimed clones “constituted a breakthrough in scientific discovery”, the court relied on Chakrabarty in holding the claims ineligible because “Dolly herself is an exact genetic replica of another sheep and does not possess ‘markedly different characteristics from any [farm animals] found in nature.’” Roslin, 750 F.3d at 1337, 110 USPQ2d at 1671.

Jump to MPEP SourcePatent Eligibility
StatutoryInformativeAlways
[mpep-2105-a7938d98fe3b30c2cb7bc969]
Cloned Mammals Are Not Eligible for Patenting
Note:
The court held that Dolly the Sheep, being an exact genetic replica of another sheep, does not possess markedly different characteristics from any farm animals found in nature and thus is ineligible for patent protection.

Subsequent judicial decisions have made clear that the Supreme Court’s decision in Chakrabarty is “central” to the eligibility inquiry with respect to nature-based products. See, e.g., Association for Molecular Pathology v. Myriad Genetics, Inc., 569 U.S. 576, 590, 106 USPQ2d 1972, 1979 (2013). For example, the Federal Circuit has indicated that “discoveries that possess ‘markedly different characteristics from any found in nature,’ … are eligible for patent protection.” In re Roslin Institute (Edinburgh), 750 F.3d 1333, 1336, 110 USPQ2d 1668, 1671 (Fed. Cir. 2014) (quoting Chakrabarty, 447 U.S. at 310, 206 USPQ2d at 197). In Roslin, the claimed invention was a live-born clone of a pre-existing, non-embryonic, donor mammal selected from cattle, sheep, pigs, and goats. An embodiment of the claimed invention was the famous Dolly the Sheep, which the court stated was “the first mammal ever cloned from an adult somatic cell.” Despite acknowledging that the method used to create the claimed clones “constituted a breakthrough in scientific discovery”, the court relied on Chakrabarty in holding the claims ineligible because “Dolly herself is an exact genetic replica of another sheep and does not possess ‘markedly different characteristics from any [farm animals] found in nature.’” Roslin, 750 F.3d at 1337, 110 USPQ2d at 1671.

Jump to MPEP SourcePatent Eligibility
StatutoryInformativeAlways
[mpep-2105-35ba45fd8a9ec9a217248e6b]
Cloned Animals Lack Markedly Different Characteristics
Note:
The court holds that cloned animals, such as Dolly the Sheep, lack markedly different characteristics from natural farm animals and are therefore ineligible for patent protection.

Subsequent judicial decisions have made clear that the Supreme Court’s decision in Chakrabarty is “central” to the eligibility inquiry with respect to nature-based products. See, e.g., Association for Molecular Pathology v. Myriad Genetics, Inc., 569 U.S. 576, 590, 106 USPQ2d 1972, 1979 (2013). For example, the Federal Circuit has indicated that “discoveries that possess ‘markedly different characteristics from any found in nature,’ … are eligible for patent protection.” In re Roslin Institute (Edinburgh), 750 F.3d 1333, 1336, 110 USPQ2d 1668, 1671 (Fed. Cir. 2014) (quoting Chakrabarty, 447 U.S. at 310, 206 USPQ2d at 197). In Roslin, the claimed invention was a live-born clone of a pre-existing, non-embryonic, donor mammal selected from cattle, sheep, pigs, and goats. An embodiment of the claimed invention was the famous Dolly the Sheep, which the court stated was “the first mammal ever cloned from an adult somatic cell.” Despite acknowledging that the method used to create the claimed clones “constituted a breakthrough in scientific discovery”, the court relied on Chakrabarty in holding the claims ineligible because “Dolly herself is an exact genetic replica of another sheep and does not possess ‘markedly different characteristics from any [farm animals] found in nature.’” Roslin, 750 F.3d at 1337, 110 USPQ2d at 1671.

Jump to MPEP SourcePatent Eligibility
StatutoryInformativeAlways
[mpep-2105-353b6862e66a8ea4e897691c]
Clones Must Have Markedly Different Characteristics
Note:
Patent claims for cloned living subjects must demonstrate the clone possesses markedly different characteristics from any naturally occurring counterpart.

Subsequent judicial decisions have made clear that the Supreme Court’s decision in Chakrabarty is “central” to the eligibility inquiry with respect to nature-based products. See, e.g., Association for Molecular Pathology v. Myriad Genetics, Inc., 569 U.S. 576, 590, 106 USPQ2d 1972, 1979 (2013). For example, the Federal Circuit has indicated that “discoveries that possess ‘markedly different characteristics from any found in nature,’ … are eligible for patent protection.” In re Roslin Institute (Edinburgh), 750 F.3d 1333, 1336, 110 USPQ2d 1668, 1671 (Fed. Cir. 2014) (quoting Chakrabarty, 447 U.S. at 310, 206 USPQ2d at 197). In Roslin, the claimed invention was a live-born clone of a pre-existing, non-embryonic, donor mammal selected from cattle, sheep, pigs, and goats. An embodiment of the claimed invention was the famous Dolly the Sheep, which the court stated was “the first mammal ever cloned from an adult somatic cell.” Despite acknowledging that the method used to create the claimed clones “constituted a breakthrough in scientific discovery”, the court relied on Chakrabarty in holding the claims ineligible because “Dolly herself is an exact genetic replica of another sheep and does not possess ‘markedly different characteristics from any [farm animals] found in nature.’” Roslin, 750 F.3d at 1337, 110 USPQ2d at 1671.

Jump to MPEP SourcePatent Eligibility
StatutoryRecommendedAlways
[mpep-2105-3533f8360ea48e5961476c98]
Markedly Different Characteristics Analysis for Living Subject Matter Patent Eligibility
Note:
Examiners must use a markedly different characteristics analysis to determine if nature-based products, such as living subject matter, are eligible for patent protection.

See MPEP § 2106.04 for a discussion of the judicial exceptions in general, MPEP § 2106.04(b), subsection II, for a discussion of products of nature, and MPEP § 2106.04(c) for a discussion of the markedly different characteristics analysis that examiners should use to determine whether a nature-based product such as living subject matter is eligible for patent protection.

Jump to MPEP SourcePatent Eligibility
StatutoryPermittedAlways
[mpep-2105-82efb05be0ddda25cf51cc0a]
No Patent on Human Organism
Note:
This rule prohibits the issuance of any patent that claims or encompasses a human organism.

Notwithstanding any other provision of law, no patent may issue on a claim directed to or encompassing a human organism.

Jump to MPEP SourcePatent Eligibility
StatutoryInformativeAlways
[mpep-2105-172cdd4f545b42b85bde5644]
Reject Claim Under 101 and AIA Section 33(a)
Note:
Use form paragraph 7.04.03 to reject claims that do not meet patent eligibility requirements under 35 U.S.C. 101 and the America Invents Act section 33(a).

Use form paragraph 7.04.03 to reject a claim under 35 U.S.C. 101 and AIA sec. 33(a).

Jump to MPEP SourcePatent EligibilityAIA vs Pre-AIA Practice
Topic

Composition of Matter

2 rules
StatutoryInformativeAlways
[mpep-2105-dec4de2fea5d15b0fc0849b1]
Patent Eligible Subject Matter for Genetically Engineered Organisms
Note:
The Supreme Court ruled that genetically engineered bacteria are patentable as they fall under the categories of manufacture or composition of matter.

In Chakrabarty, the Supreme Court held that a claim to a genetically engineered bacterium was directed to at least one of the four statutory categories, because the bacterium was a “manufacture” and/or a “composition of matter.” In its opinion, the Court stated that “Congress plainly contemplated that the patent laws would be given wide scope” because it chose to draft 35 U.S.C. 101 using “such expansive terms as ‘manufacture’ and ‘composition of matter,’ modified by the comprehensive ‘any.’” 447 U.S. at 308, 206 USPQ at 197. The Court also determined that the distinction between living and inanimate things was not relevant for subject matter eligibility. 447 U.S. at 313, 206 USPQ at 199. Thus, the Court held that living subject matter with markedly different characteristics from any found in nature, such as the claimed bacterium produced by genetic engineering, is not excluded from patent protection by 35 U.S.C. 101. 447 U.S. at 310, 206 USPQ at 197.

Jump to MPEP SourceComposition of MatterManufacture (Article of Manufacture)Statutory Categories of Invention
StatutoryInformativeAlways
[mpep-2105-50c7025d77a44ed6c939e4ef]
Congress Intended Broad Patent Protection
Note:
The Court determined that Congress intended the patent laws to have a wide scope, as evidenced by the use of expansive terms in 35 U.S.C. 101.

In Chakrabarty, the Supreme Court held that a claim to a genetically engineered bacterium was directed to at least one of the four statutory categories, because the bacterium was a “manufacture” and/or a “composition of matter.” In its opinion, the Court stated that “Congress plainly contemplated that the patent laws would be given wide scope” because it chose to draft 35 U.S.C. 101 using “such expansive terms as ‘manufacture’ and ‘composition of matter,’ modified by the comprehensive ‘any.’” 447 U.S. at 308, 206 USPQ at 197. The Court also determined that the distinction between living and inanimate things was not relevant for subject matter eligibility. 447 U.S. at 313, 206 USPQ at 199. Thus, the Court held that living subject matter with markedly different characteristics from any found in nature, such as the claimed bacterium produced by genetic engineering, is not excluded from patent protection by 35 U.S.C. 101. 447 U.S. at 310, 206 USPQ at 197.

Jump to MPEP SourceComposition of MatterManufacture (Article of Manufacture)Statutory Categories of Invention
Topic

35 U.S.C. 101 – Patent Eligibility

2 rules
StatutoryInformativeAlways
[mpep-2105-6d0513a6b62f8b16f036488b]
Genetically Engineered Bacteria Not Excluded from Patent Protection
Note:
The Court held that living subject matter with markedly different characteristics from any found in nature, such as genetically engineered bacteria, is not excluded from patent protection under 35 U.S.C. 101.

In Chakrabarty, the Supreme Court held that a claim to a genetically engineered bacterium was directed to at least one of the four statutory categories, because the bacterium was a “manufacture” and/or a “composition of matter.” In its opinion, the Court stated that “Congress plainly contemplated that the patent laws would be given wide scope” because it chose to draft 35 U.S.C. 101 using “such expansive terms as ‘manufacture’ and ‘composition of matter,’ modified by the comprehensive ‘any.’” 447 U.S. at 308, 206 USPQ at 197. The Court also determined that the distinction between living and inanimate things was not relevant for subject matter eligibility. 447 U.S. at 313, 206 USPQ at 199. Thus, the Court held that living subject matter with markedly different characteristics from any found in nature, such as the claimed bacterium produced by genetic engineering, is not excluded from patent protection by 35 U.S.C. 101. 447 U.S. at 310, 206 USPQ at 197.

Jump to MPEP SourcePatent EligibilityComposition of Matter
StatutoryRequiredAlways
[mpep-2105-3e399fac6b4e0f7546eb35b6]
Requirement for Quoting 35 U.S.C. 101
Note:
This paragraph must quote section 35 U.S.C. 101 before stating the patent eligibility requirements.

1. This paragraph must be preceded by form paragraph 7.04.01 which quotes 35 U.S.C. 101.

35 U.S.C.Patent Eligibility
Topic

PTAB Jurisdiction

2 rules
StatutoryInformativeAlways
[mpep-2105-146dabacea171a648d11b39f]
Animals Can Be Patented
Note:
The Board of Patent Appeals and Interferences determined that animals are patentable subject matter under 35 U.S.C. 101 following the Chakrabarty decision.

Following the reasoning in Chakrabarty, the Board of Patent Appeals and Interferences determined that animals are patentable subject matter under 35 U.S.C. 101. In Ex parte Allen, 2 USPQ2d 1425 (Bd. Pat. App. & Inter. 1987), the Board decided that a non-naturally occurring polyploid Pacific coast oyster could have been the proper subject of a patent under 35 U.S.C. 101 if all the criteria for patentability were satisfied. Shortly after the Allen decision, the Commissioner of Patents and Trademarks issued a notice (Animals – Patentability, 1077 O.G. 24, April 21, 1987) stating that the Patent and Trademark Office “now considers nonnaturally occurring, non-human multicellular living organisms, including animals, to be patentable subject matter within the scope of 35 U.S.C. 101.”

Jump to MPEP SourcePTAB JurisdictionPTAB Contested Case ProceduresPatent Eligibility
StatutoryInformativeAlways
[mpep-2105-57aae8040454cef6f9200fe6]
Non-Naturally Occurring Animals Patentable
Note:
The Board of Patent Appeals and Interferences ruled that non-naturally occurring animals, such as a polyploid Pacific coast oyster, can be patentable subject matter under 35 U.S.C. 101 if all patentability criteria are met.

Following the reasoning in Chakrabarty, the Board of Patent Appeals and Interferences determined that animals are patentable subject matter under 35 U.S.C. 101. In Ex parte Allen, 2 USPQ2d 1425 (Bd. Pat. App. & Inter. 1987), the Board decided that a non-naturally occurring polyploid Pacific coast oyster could have been the proper subject of a patent under 35 U.S.C. 101 if all the criteria for patentability were satisfied. Shortly after the Allen decision, the Commissioner of Patents and Trademarks issued a notice (Animals – Patentability, 1077 O.G. 24, April 21, 1987) stating that the Patent and Trademark Office “now considers nonnaturally occurring, non-human multicellular living organisms, including animals, to be patentable subject matter within the scope of 35 U.S.C. 101.”

Jump to MPEP SourcePTAB JurisdictionPTAB Contested Case ProceduresPatent Eligibility
Topic

Statutory Categories of Invention

1 rules
StatutoryInformativeAlways
[mpep-2105-c1b4c031fd154366750085ad]
Living Matter No Longer Excludes Patentability
Note:
The decision in Diamond v. Chakrabarty removed the exclusion of living subject matter from patent eligibility, making it irrelevant whether an invention involves living matter.

Prior to 1980, it was widely believed that living subject matter was not eligible for patenting, either because such subject matter did not fall within a statutory category, or because it was a judicial exception to patent eligibility. However, the decision of the Supreme Court in Diamond v. Chakrabarty, 447 U.S. 303, 206 USPQ 193 (1980), made it clear that the question of whether an invention embraces living matter is irrelevant to the issue of patent eligibility. Note, however, that Congress has excluded claims directed to or encompassing a human organism from eligibility. See The Leahy-Smith America Invents Act (AIA), Pub. L. 112-29, sec. 33(a), 125 Stat. 284 (September 16, 2011).

Jump to MPEP SourceStatutory Categories of InventionPatent Eligibility
Topic

Human Organism Claims Prohibition

1 rules
StatutoryInformativeAlways
[mpep-2105-e5d5d136aeaf90c3b347b221]
Claims Directed to Human Organisms Prohibited
Note:
Congress has excluded claims encompassing human organisms from patent eligibility under the AIA.

Prior to 1980, it was widely believed that living subject matter was not eligible for patenting, either because such subject matter did not fall within a statutory category, or because it was a judicial exception to patent eligibility. However, the decision of the Supreme Court in Diamond v. Chakrabarty, 447 U.S. 303, 206 USPQ 193 (1980), made it clear that the question of whether an invention embraces living matter is irrelevant to the issue of patent eligibility. Note, however, that Congress has excluded claims directed to or encompassing a human organism from eligibility. See The Leahy-Smith America Invents Act (AIA), Pub. L. 112-29, sec. 33(a), 125 Stat. 284 (September 16, 2011).

Jump to MPEP SourceHuman Organism Claims ProhibitionPatent Eligibility
Topic

Process (Method)

1 rules
StatutoryInformativeAlways
[mpep-2105-3938af469cd860a90b91aa88]
Claims Directed to Human Organism Not Eligible
Note:
The rule states that claims directed to or encompassing a human organism are not eligible for patenting under the Leahy-Smith America Invents Act.

Prior to 1980, it was widely believed that living subject matter was not eligible for patenting, either because such subject matter did not fall within a statutory category, or because it was a judicial exception to patent eligibility. However, the decision of the Supreme Court in Diamond v. Chakrabarty, 447 U.S. 303, 206 USPQ 193 (1980), made it clear that the question of whether an invention embraces living matter is irrelevant to the issue of patent eligibility. Note, however, that Congress has excluded claims directed to or encompassing a human organism from eligibility. See The Leahy-Smith America Invents Act (AIA), Pub. L. 112-29, sec. 33(a), 125 Stat. 284 (September 16, 2011).

Jump to MPEP SourceProcess (Method)AIA vs Pre-AIA PracticePatent Eligibility
Topic

Determining Whether Application Is AIA or Pre-AIA

1 rules
StatutoryRequiredAlways
[mpep-2105-d068b7c1296cd9fab50981e5]
Requirement for Rejecting Human Organism Inventions
Note:
If the claimed invention encompasses a human organism, reject it under 35 U.S.C. 101 and AIA sec. 33(a) as nonstatutory subject matter and examine all patentability issues.

If the broadest reasonable interpretation of the claimed invention as a whole encompasses a human organism, then a rejection under 35 U.S.C. 101 and AIA sec. 33(a) must be made indicating that the claimed invention is directed to a human organism and is therefore nonstatutory subject matter. Furthermore, the claimed invention must be examined with regard to all issues pertinent to patentability, and any applicable rejections under 35 U.S.C. 102, 103, or 112 must also be made.

Jump to MPEP SourceDetermining Whether Application Is AIA or Pre-AIADetermining AIA vs Pre-AIA Applicability (MPEP 2159)Human Organism Claims Prohibition

Citations

Primary topicCitation
35 U.S.C. 101 – Patent Eligibility
Composition of Matter
Determining Whether Application Is AIA or Pre-AIA
PTAB Jurisdiction
Patent Eligibility
35 U.S.C. § 101
Determining Whether Application Is AIA or Pre-AIA35 U.S.C. § 102
Patent Eligibility35 U.S.C. § 161
Patent EligibilityMPEP § 2106.03
Patent EligibilityMPEP § 2106.04
Patent EligibilityMPEP § 2106.04(b)
Patent EligibilityMPEP § 2106.04(c)
35 U.S.C. 101 – Patent EligibilityForm Paragraph § 7.04.01
Patent EligibilityForm Paragraph § 7.04.03
Patent EligibilityAssociation for Molecular Pathology v. Myriad Genetics, Inc., 569 U.S. 576, 590, 106 USPQ2d 1972, 1979 (2013)
Human Organism Claims Prohibition
Process (Method)
Statutory Categories of Invention
decision of the Supreme Court in Diamond v. Chakrabarty, 447 U.S. 303, 206 USPQ 193 (1980)

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