MPEP § 2404 — Need or Opportunity to Make a Deposit (Annotated Rules)

§2404 Need or Opportunity to Make a Deposit

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

This page consolidates and annotates all enforceable requirements under MPEP § 2404, 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.

Need or Opportunity to Make a Deposit

This section addresses Need or Opportunity to Make a Deposit. Primary authority: 35 U.S.C. 112, 37 CFR 1.802(a), and 37 CFR 1.802. Contains: 2 requirements, 1 prohibition, 1 guidance statement, 1 permission, and 1 other statement.

Key Rules

Topic

When Deposit is Required

4 rules
StatutoryRequiredAlways
[mpep-2404-40dbf203f5299f8aadb2114b]
Deposit Must Be Made According to Regulations
Note:
A deposit is required and must be made in accordance with the specified regulations.

(b) Biological material need not be deposited unless access to such material is necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112. If a deposit is necessary, it shall be acceptable if made in accordance with these regulations. Biological material need not be deposited, inter alia, if it is known and readily available to the public or can be made or isolated without undue experimentation. Once deposited in a depository complying with these regulations, a biological material will be considered to be readily available even though some requirement of law or regulation of the United States or of the country in which the depository institution is located permits access to the material only under conditions imposed for safety, public health or similar reasons.

Jump to MPEP Source · 37 CFR 1.802When Deposit is RequiredDeposit of Biological MaterialsThird Party Access to Files (MPEP 103, 1134.01)
StatutoryRequiredAlways
[mpep-2404-723a48c43343e3e40f974bbd]
Deposit Not Presumed Necessary
Note:
The reference to biological material in a specification or its deposit by an applicant does not imply it is necessary for satisfying the patent requirements.

(c) The reference to a biological material in a specification disclosure or the actual deposit of such material by an applicant or patent owner does not create any presumption that such material is necessary to satisfy 35 U.S.C. 112 or that deposit in accordance with these regulations is or was required.

Jump to MPEP Source · 37 CFR 1.802When Deposit is RequiredDeposit of Biological MaterialsPatent Application Content
StatutoryInformativeAlways
[mpep-2404-de80c6d733192d0436b9893d]
Deposit of Biological Material Permitted for Invention Relying on Such Material
Note:
A patent application can reference a deposited biological material if the invention depends on it, either as a preferred or alternative mode of operation.

37 CFR 1.802(a) permits a deposit of a biological material to be referenced in a patent application where an invention is, or relies on, a biological material. The invention may rely on a biological material for the purposes of making or using the invention, either as a preferred mode or an alternative mode of operation. A reference to a deposit may be included in a specification even though the deposit is not required to satisfy the requirements of 35 U.S.C. 112.

Jump to MPEP Source · 37 CFR 1.802(a)When Deposit is RequiredDeposit of Biological MaterialsPatent Application Content
StatutoryRequiredAlways
[mpep-2404-0f685c7882d328e7bf705d18]
Deposit Required for Necessary Access
Note:
A deposit is acceptable for patent purposes only if it is made in accordance with the regulations when necessary access to biological material is required.

There is no necessary implication or presumption that can or should be made about the need for a deposit simply because reference to a deposit is made in an application disclosure, as noted in paragraph (c). As noted in paragraph (b), biological material need not be deposited unless access to such material is necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112 and that access is not otherwise available in the absence of a deposit. Where a deposit is required to provide the necessary access, a deposit is acceptable for patent purposes only where it is made in accordance with these regulations. Even where access to biological material is required to satisfy these statutory requirements, a deposit may not be necessary if access sufficient to satisfy these requirements is otherwise available.

Jump to MPEP Source · 37 CFR 1.802When Deposit is RequiredAccess to Patent Application Files (MPEP 101-106)Deposit of Biological Materials
Topic

Access to Patent Application Files (MPEP 101-106)

3 rules
StatutoryInformativeAlways
[mpep-2404-739d1712ee3424f107ee2827]
Deposit Not Required Unless Necessary for Patentability
Note:
A deposit of biological material is not required unless access to the material is necessary to satisfy patentability requirements under 35 U.S.C. 112.

(b) Biological material need not be deposited unless access to such material is necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112. If a deposit is necessary, it shall be acceptable if made in accordance with these regulations. Biological material need not be deposited, inter alia, if it is known and readily available to the public or can be made or isolated without undue experimentation. Once deposited in a depository complying with these regulations, a biological material will be considered to be readily available even though some requirement of law or regulation of the United States or of the country in which the depository institution is located permits access to the material only under conditions imposed for safety, public health or similar reasons.

Jump to MPEP Source · 37 CFR 1.802Access to Patent Application Files (MPEP 101-106)Deposit of Biological MaterialsDisclosure Requirements
StatutoryRecommendedAlways
[mpep-2404-fb8f699b887e6d5c7d07f83d]
Deposit Not Needed Unless Access Necessary
Note:
A deposit of biological material is not required unless access to the material is necessary for patentability and cannot be obtained otherwise.

There is no necessary implication or presumption that can or should be made about the need for a deposit simply because reference to a deposit is made in an application disclosure, as noted in paragraph (c). As noted in paragraph (b), biological material need not be deposited unless access to such material is necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112 and that access is not otherwise available in the absence of a deposit. Where a deposit is required to provide the necessary access, a deposit is acceptable for patent purposes only where it is made in accordance with these regulations. Even where access to biological material is required to satisfy these statutory requirements, a deposit may not be necessary if access sufficient to satisfy these requirements is otherwise available.

Jump to MPEP Source · 37 CFR 1.802Access to Patent Application Files (MPEP 101-106)Deposit of Biological MaterialsDisclosure Requirements
StatutoryProhibitedAlways
[mpep-2404-3f5348132d02d571516a3360]
Access Sufficient for Statutory Requirements Is Enough
Note:
A deposit is not necessary if access to biological material sufficient to meet statutory patentability requirements is already available.

There is no necessary implication or presumption that can or should be made about the need for a deposit simply because reference to a deposit is made in an application disclosure, as noted in paragraph (c). As noted in paragraph (b), biological material need not be deposited unless access to such material is necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112 and that access is not otherwise available in the absence of a deposit. Where a deposit is required to provide the necessary access, a deposit is acceptable for patent purposes only where it is made in accordance with these regulations. Even where access to biological material is required to satisfy these statutory requirements, a deposit may not be necessary if access sufficient to satisfy these requirements is otherwise available.

Jump to MPEP Source · 37 CFR 1.802Access to Patent Application Files (MPEP 101-106)Deposit of Biological MaterialsWhen Deposit is Required
Topic

Deposit of Biological Materials

2 rules
StatutoryPermittedAlways
[mpep-2404-dc3a160ebb148b1701be4ce9]
Disclosure May Include Deposit Reference
Note:
Disclosure may include a reference to the deposit of biological materials used in an invention.

(a) Where an invention is, or relies on, a biological material, the disclosure may include reference to a deposit of such biological material.

Jump to MPEP Source · 37 CFR 1.802Deposit of Biological MaterialsWhen Deposit is Required
StatutoryPermittedAlways
[mpep-2404-132b24d95318266412722e62]
Patent Application May Reference Biological Material Deposit
Note:
A patent application can include a reference to a biological material deposit even if not required, for inventions that rely on such materials.

37 CFR 1.802(a) permits a deposit of a biological material to be referenced in a patent application where an invention is, or relies on, a biological material. The invention may rely on a biological material for the purposes of making or using the invention, either as a preferred mode or an alternative mode of operation. A reference to a deposit may be included in a specification even though the deposit is not required to satisfy the requirements of 35 U.S.C. 112.

Jump to MPEP Source · 37 CFR 1.802(a)Deposit of Biological MaterialsWhen Deposit is RequiredPatent Application Content
Topic

Third Party Access to Files (MPEP 103, 1134.01)

2 rules
StatutoryPermittedAlways
[mpep-2404-b0e4ff5fdb4c5c6f75dda37c]
Publicly Available Biological Material Not Requiring Deposit
Note:
If biological material is known and readily available to the public or can be made without undue experimentation, it does not need to be deposited.

(b) Biological material need not be deposited unless access to such material is necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112. If a deposit is necessary, it shall be acceptable if made in accordance with these regulations. Biological material need not be deposited, inter alia, if it is known and readily available to the public or can be made or isolated without undue experimentation. Once deposited in a depository complying with these regulations, a biological material will be considered to be readily available even though some requirement of law or regulation of the United States or of the country in which the depository institution is located permits access to the material only under conditions imposed for safety, public health or similar reasons.

Jump to MPEP Source · 37 CFR 1.802Third Party Access to Files (MPEP 103, 1134.01)Deposit of Biological MaterialsWhen Deposit is Required
StatutoryInformativeAlways
[mpep-2404-4781343b95e34d14fcb27d0c]
Deposited Biological Material Is Considered Readily Available Regardless of Access Conditions
Note:
Once deposited in a compliant depository, biological material is deemed readily available even if access is restricted for safety or public health reasons.

(b) Biological material need not be deposited unless access to such material is necessary for the satisfaction of the statutory requirements for patentability under 35 U.S.C. 112. If a deposit is necessary, it shall be acceptable if made in accordance with these regulations. Biological material need not be deposited, inter alia, if it is known and readily available to the public or can be made or isolated without undue experimentation. Once deposited in a depository complying with these regulations, a biological material will be considered to be readily available even though some requirement of law or regulation of the United States or of the country in which the depository institution is located permits access to the material only under conditions imposed for safety, public health or similar reasons.

Jump to MPEP Source · 37 CFR 1.802Third Party Access to Files (MPEP 103, 1134.01)Access to Patent Application Files (MPEP 101-106)Deposit of Biological Materials
Topic

Patent Application Content

1 rules
StatutoryRequiredAlways
[mpep-2404-1ae869525b9153176c960078]
Deposit Reference Permitted in Specification
Note:
A deposit reference can be included even if not required by 35 U.S.C. 112.

37 CFR 1.802(a) permits a deposit of a biological material to be referenced in a patent application where an invention is, or relies on, a biological material. The invention may rely on a biological material for the purposes of making or using the invention, either as a preferred mode or an alternative mode of operation. A reference to a deposit may be included in a specification even though the deposit is not required to satisfy the requirements of 35 U.S.C. 112.

Jump to MPEP Source · 37 CFR 1.802(a)Patent Application ContentDisclosure RequirementsWhen Deposit is Required

Citations

Primary topicCitation
Access to Patent Application Files (MPEP 101-106)
Deposit of Biological Materials
Patent Application Content
Third Party Access to Files (MPEP 103, 1134.01)
When Deposit is Required
35 U.S.C. § 112
Deposit of Biological Materials
Patent Application Content
When Deposit is Required
37 CFR § 1.802(a)

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