MPEP § 2402 — The Deposit Rules (Annotated Rules)

§2402 The Deposit Rules

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

This page consolidates and annotates all enforceable requirements under MPEP § 2402, 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.

The Deposit Rules

This section addresses The Deposit Rules. Primary authority: 35 U.S.C. 101, 35 U.S.C. 112, and 37 CFR 1.801. Contains: 4 requirements, 1 prohibition, 2 permissions, and 3 other statements.

Key Rules

Topic

Deposit of Biological Materials

7 rules
StatutoryRequiredAlways
[mpep-2402-8d1ab45d92d906ca60ec99bb]
Biological Material Including Self-Replicating Substances
Note:
This rule defines biological material to include any substance capable of self-replication, whether directly or indirectly.

For the purposes of these regulations pertaining to the deposit of biological material for purposes of patents for inventions under 35 U.S.C. 101, the term biological material shall include material that is capable of self-replication either directly or indirectly. Representative examples include bacteria, fungi including yeast, algae, protozoa, eukaryotic cells, cell lines, hybridomas, plasmids, viruses, plant tissue cells, lichens and seeds. Viruses, vectors, cell organelles and other non-living material existing in and reproducible from a living cell may be deposited by deposit of the host cell capable of reproducing the non-living material.

Jump to MPEP Source · 37 CFR 1.801Deposit of Biological MaterialsPatent Eligibility
StatutoryInformativeAlways
[mpep-2402-4ca735fb8a456fe012a35ece]
Deposit of Biological Materials Required for Patents
Note:
This rule requires the deposit of biological materials such as bacteria, fungi, algae, and viruses for patenting inventions under 35 U.S.C. 101.

For the purposes of these regulations pertaining to the deposit of biological material for purposes of patents for inventions under 35 U.S.C. 101, the term biological material shall include material that is capable of self-replication either directly or indirectly. Representative examples include bacteria, fungi including yeast, algae, protozoa, eukaryotic cells, cell lines, hybridomas, plasmids, viruses, plant tissue cells, lichens and seeds. Viruses, vectors, cell organelles and other non-living material existing in and reproducible from a living cell may be deposited by deposit of the host cell capable of reproducing the non-living material.

Jump to MPEP Source · 37 CFR 1.801Deposit of Biological MaterialsPatent Eligibility
StatutoryPermittedAlways
[mpep-2402-250dc1249ba3634023cf1dba]
Host Cell Required for Non-Living Material Deposition
Note:
A host cell capable of reproducing non-living material must be deposited to meet patent deposit requirements.

For the purposes of these regulations pertaining to the deposit of biological material for purposes of patents for inventions under 35 U.S.C. 101, the term biological material shall include material that is capable of self-replication either directly or indirectly. Representative examples include bacteria, fungi including yeast, algae, protozoa, eukaryotic cells, cell lines, hybridomas, plasmids, viruses, plant tissue cells, lichens and seeds. Viruses, vectors, cell organelles and other non-living material existing in and reproducible from a living cell may be deposited by deposit of the host cell capable of reproducing the non-living material.

Jump to MPEP Source · 37 CFR 1.801Deposit of Biological MaterialsPatent Eligibility
StatutoryRequiredAlways
[mpep-2402-804792b9a44bba3e1039d42b]
Patent Must Describe Invention Fully
Note:
A patent must include a detailed description that enables someone skilled in the relevant field to make and use the invention, including biological materials if necessary.

Every patent must contain a written description of the invention sufficient to enable a person skilled in the art to which the invention pertains to make and use the invention. Where the invention involves a biological material and words alone cannot sufficiently describe how to make and use the invention in a reproducible manner, access to the biological material may be necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112. Courts have recognized the necessity and desirability of permitting an applicant for a patent to supplement the written disclosure in an application with a deposit of biological material which is essential to meet some requirement of the statute with respect to the claimed invention. See, e.g., Ajinomoto Co. v. Archer-Daniels-Midland Co., 228 F.3d 1338, 1345-46, 56 USPQ2d 1332, 1337-38 (Fed. Cir. 2000), cert. denied, 121 S.Ct. 1957 (2001)(explaining how deposit may help satisfy enablement requirement); Enzo Biochem, Inc. v. Gen-Probe, Inc., 323 F.3d 956, 63 USPQ2d 1609 (Fed. Cir. 2002)(deposit may satisfy the written description requirement); In re Argoudelis, 434 F.2d 666, 168 USPQ 99 (CCPA 1970). To facilitate the recognition of deposited biological material in patent applications throughout the world, the Budapest Treaty on the International Recognition of the Deposit of Microorganisms for the Purposes of Patent Procedure was established in 1977, and became operational in 1981. The Treaty requires signatory countries, like the United States, to recognize a deposit with any depository which has been approved by the World Intellectual Property Organization (WIPO).

Jump to MPEP Source · 37 CFR 1.801Deposit of Biological MaterialsBudapest Treaty DepositsAccess to Patent Application Files (MPEP 101-106)
StatutoryInformativeAlways
[mpep-2402-f4e60cc317d8ce5c5c717161]
Deposit of Biological Materials Required for Patentability
Note:
Patent applicants must deposit biological materials necessary to meet statutory requirements, ensuring enablement and written description.

Every patent must contain a written description of the invention sufficient to enable a person skilled in the art to which the invention pertains to make and use the invention. Where the invention involves a biological material and words alone cannot sufficiently describe how to make and use the invention in a reproducible manner, access to the biological material may be necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112. Courts have recognized the necessity and desirability of permitting an applicant for a patent to supplement the written disclosure in an application with a deposit of biological material which is essential to meet some requirement of the statute with respect to the claimed invention. See, e.g., Ajinomoto Co. v. Archer-Daniels-Midland Co., 228 F.3d 1338, 1345-46, 56 USPQ2d 1332, 1337-38 (Fed. Cir. 2000), cert. denied, 121 S.Ct. 1957 (2001)(explaining how deposit may help satisfy enablement requirement); Enzo Biochem, Inc. v. Gen-Probe, Inc., 323 F.3d 956, 63 USPQ2d 1609 (Fed. Cir. 2002)(deposit may satisfy the written description requirement); In re Argoudelis, 434 F.2d 666, 168 USPQ 99 (CCPA 1970). To facilitate the recognition of deposited biological material in patent applications throughout the world, the Budapest Treaty on the International Recognition of the Deposit of Microorganisms for the Purposes of Patent Procedure was established in 1977, and became operational in 1981. The Treaty requires signatory countries, like the United States, to recognize a deposit with any depository which has been approved by the World Intellectual Property Organization (WIPO).

Jump to MPEP Source · 37 CFR 1.801Deposit of Biological MaterialsBudapest Treaty DepositsAccess to Patent Application Files (MPEP 101-106)
StatutoryPermittedAlways
[mpep-2402-53ba3d1c5b124cef4ee2fb65]
Deposit May Satisfy Description and Enablement Requirements
Note:
A deposit of biological material may be required to satisfy the written description and enablement requirements for patentability.

Every patent must contain a written description of the invention sufficient to enable a person skilled in the art to which the invention pertains to make and use the invention. Where the invention involves a biological material and words alone cannot sufficiently describe how to make and use the invention in a reproducible manner, access to the biological material may be necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112. Courts have recognized the necessity and desirability of permitting an applicant for a patent to supplement the written disclosure in an application with a deposit of biological material which is essential to meet some requirement of the statute with respect to the claimed invention. See, e.g., Ajinomoto Co. v. Archer-Daniels-Midland Co., 228 F.3d 1338, 1345-46, 56 USPQ2d 1332, 1337-38 (Fed. Cir. 2000), cert. denied, 121 S.Ct. 1957 (2001)(explaining how deposit may help satisfy enablement requirement); Enzo Biochem, Inc. v. Gen-Probe, Inc., 323 F.3d 956, 63 USPQ2d 1609 (Fed. Cir. 2002)(deposit may satisfy the written description requirement); In re Argoudelis, 434 F.2d 666, 168 USPQ 99 (CCPA 1970). To facilitate the recognition of deposited biological material in patent applications throughout the world, the Budapest Treaty on the International Recognition of the Deposit of Microorganisms for the Purposes of Patent Procedure was established in 1977, and became operational in 1981. The Treaty requires signatory countries, like the United States, to recognize a deposit with any depository which has been approved by the World Intellectual Property Organization (WIPO).

Jump to MPEP Source · 37 CFR 1.801Deposit of Biological MaterialsBudapest Treaty DepositsAccess to Patent Application Files (MPEP 101-106)
StatutoryInformativeAlways
[mpep-2402-654c984062b9d456b6da5d71]
Depository for Biological Materials Must Be Approved by WIPO
Note:
Signatory countries, including the United States, must recognize deposits of biological materials with depositories approved by the World Intellectual Property Organization (WIPO).

Every patent must contain a written description of the invention sufficient to enable a person skilled in the art to which the invention pertains to make and use the invention. Where the invention involves a biological material and words alone cannot sufficiently describe how to make and use the invention in a reproducible manner, access to the biological material may be necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112. Courts have recognized the necessity and desirability of permitting an applicant for a patent to supplement the written disclosure in an application with a deposit of biological material which is essential to meet some requirement of the statute with respect to the claimed invention. See, e.g., Ajinomoto Co. v. Archer-Daniels-Midland Co., 228 F.3d 1338, 1345-46, 56 USPQ2d 1332, 1337-38 (Fed. Cir. 2000), cert. denied, 121 S.Ct. 1957 (2001)(explaining how deposit may help satisfy enablement requirement); Enzo Biochem, Inc. v. Gen-Probe, Inc., 323 F.3d 956, 63 USPQ2d 1609 (Fed. Cir. 2002)(deposit may satisfy the written description requirement); In re Argoudelis, 434 F.2d 666, 168 USPQ 99 (CCPA 1970). To facilitate the recognition of deposited biological material in patent applications throughout the world, the Budapest Treaty on the International Recognition of the Deposit of Microorganisms for the Purposes of Patent Procedure was established in 1977, and became operational in 1981. The Treaty requires signatory countries, like the United States, to recognize a deposit with any depository which has been approved by the World Intellectual Property Organization (WIPO).

Jump to MPEP Source · 37 CFR 1.801Deposit of Biological MaterialsBudapest Treaty DepositsAccess to Patent Application Files (MPEP 101-106)
Topic

Access to Patent Application Files (MPEP 101-106)

1 rules
StatutoryProhibitedAlways
[mpep-2402-ac8df63eb35a09b1f9799766]
Deposit Required for Biological Materials
Note:
A deposit of biological material is required when words alone cannot sufficiently describe how to make and use the invention in a reproducible manner.

Every patent must contain a written description of the invention sufficient to enable a person skilled in the art to which the invention pertains to make and use the invention. Where the invention involves a biological material and words alone cannot sufficiently describe how to make and use the invention in a reproducible manner, access to the biological material may be necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112. Courts have recognized the necessity and desirability of permitting an applicant for a patent to supplement the written disclosure in an application with a deposit of biological material which is essential to meet some requirement of the statute with respect to the claimed invention. See, e.g., Ajinomoto Co. v. Archer-Daniels-Midland Co., 228 F.3d 1338, 1345-46, 56 USPQ2d 1332, 1337-38 (Fed. Cir. 2000), cert. denied, 121 S.Ct. 1957 (2001)(explaining how deposit may help satisfy enablement requirement); Enzo Biochem, Inc. v. Gen-Probe, Inc., 323 F.3d 956, 63 USPQ2d 1609 (Fed. Cir. 2002)(deposit may satisfy the written description requirement); In re Argoudelis, 434 F.2d 666, 168 USPQ 99 (CCPA 1970). To facilitate the recognition of deposited biological material in patent applications throughout the world, the Budapest Treaty on the International Recognition of the Deposit of Microorganisms for the Purposes of Patent Procedure was established in 1977, and became operational in 1981. The Treaty requires signatory countries, like the United States, to recognize a deposit with any depository which has been approved by the World Intellectual Property Organization (WIPO).

Jump to MPEP Source · 37 CFR 1.801Access to Patent Application Files (MPEP 101-106)Deposit of Biological MaterialsDisclosure Requirements
Topic

Budapest Treaty Deposits

1 rules
StatutoryInformativeAlways
[mpep-2402-de6ef21ff9dca6a9e32a099d]
Deposit Requirement for Biological Materials
Note:
Patent applications involving biological materials must include a deposit recognized by the Budapest Treaty to satisfy statutory requirements.

Every patent must contain a written description of the invention sufficient to enable a person skilled in the art to which the invention pertains to make and use the invention. Where the invention involves a biological material and words alone cannot sufficiently describe how to make and use the invention in a reproducible manner, access to the biological material may be necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112. Courts have recognized the necessity and desirability of permitting an applicant for a patent to supplement the written disclosure in an application with a deposit of biological material which is essential to meet some requirement of the statute with respect to the claimed invention. See, e.g., Ajinomoto Co. v. Archer-Daniels-Midland Co., 228 F.3d 1338, 1345-46, 56 USPQ2d 1332, 1337-38 (Fed. Cir. 2000), cert. denied, 121 S.Ct. 1957 (2001)(explaining how deposit may help satisfy enablement requirement); Enzo Biochem, Inc. v. Gen-Probe, Inc., 323 F.3d 956, 63 USPQ2d 1609 (Fed. Cir. 2002)(deposit may satisfy the written description requirement); In re Argoudelis, 434 F.2d 666, 168 USPQ 99 (CCPA 1970). To facilitate the recognition of deposited biological material in patent applications throughout the world, the Budapest Treaty on the International Recognition of the Deposit of Microorganisms for the Purposes of Patent Procedure was established in 1977, and became operational in 1981. The Treaty requires signatory countries, like the United States, to recognize a deposit with any depository which has been approved by the World Intellectual Property Organization (WIPO).

Jump to MPEP Source · 37 CFR 1.801Budapest Treaty DepositsDeposit of Biological MaterialsAccess to Patent Application Files (MPEP 101-106)
Topic

Reference to Deposit in Specification

1 rules
StatutoryRequiredAlways
[mpep-2402-b03d0207aee686c499acab20]
Deposit Requirements for Biological Material
Note:
The rules outline the procedures and conditions that must be met when a deposit of biological material is required in an application.

The deposit rules (37 CFR 1.801 – 1.809) set forth examining procedures and conditions of deposit which must be satisfied in the event a deposit is required. The rules do not address the substantive issue of whether a deposit is required under any particular set of facts.

Jump to MPEP Source · 37 CFR 1.801Reference to Deposit in SpecificationWhen Deposit is RequiredDeposit of Biological Materials
Topic

When Deposit is Required

1 rules
StatutoryRequiredAlways
[mpep-2402-680f148aa81f5a4016784028]
Deposit Not Required by These Rules
Note:
The rules do not address whether a deposit is required under specific circumstances.

The deposit rules (37 CFR 1.801 – 1.809) set forth examining procedures and conditions of deposit which must be satisfied in the event a deposit is required. The rules do not address the substantive issue of whether a deposit is required under any particular set of facts.

Jump to MPEP Source · 37 CFR 1.801When Deposit is RequiredDeposit of Biological MaterialsReference to Deposit in Specification
Topic

PCT International Application Filing

1 rules
StatutoryInformativeAlways
[mpep-2402-ed58cde505ad1125a41da502]
Requirement for Deposited Biological Material Reference
Note:
The rule requires that a reference to a deposited biological material be included in an international application under PCT.

See PCT Rule 13bis and MPEP § 1823.01 for the requirements under the PCT for a reference to a deposited biological material in an international application.

Jump to MPEP Source · 37 CFR 1.801PCT International Application FilingDeposit of Biological MaterialsPatent Cooperation Treaty

Citations

Primary topicCitation
Deposit of Biological Materials35 U.S.C. § 101
Access to Patent Application Files (MPEP 101-106)
Budapest Treaty Deposits
Deposit of Biological Materials
35 U.S.C. § 112
Reference to Deposit in Specification
When Deposit is Required
37 CFR § 1.801
PCT International Application FilingMPEP § 1823.01
Access to Patent Application Files (MPEP 101-106)
Budapest Treaty Deposits
Deposit of Biological Materials
Enzo Biochem, Inc. v. Gen-Probe, Inc., 323 F.3d 956, 63 USPQ2d 1609 (Fed. Cir. 2002)
Access to Patent Application Files (MPEP 101-106)
Budapest Treaty Deposits
Deposit of Biological Materials
In re Argoudelis, 434 F.2d 666, 168 USPQ 99 (CCPA 1970)
PCT International Application FilingPCT Rule 13bis

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