MPEP § 821 — Treatment of Claims Held To Be Drawn to Nonelected Inventions (Annotated Rules)

§821 Treatment of Claims Held To Be Drawn to Nonelected Inventions

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

This page consolidates and annotates all enforceable requirements under MPEP § 821, 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.

Treatment of Claims Held To Be Drawn to Nonelected Inventions

This section addresses Treatment of Claims Held To Be Drawn to Nonelected Inventions. Primary authority: 37 CFR 1.142(b), 37 CFR 1.143, and 37 CFR 1.144. Contains: 2 guidance statements, 2 permissions, and 2 other statements.

Key Rules

Topic

Restriction and Election

2 rules
StatutoryInformativeAlways
[mpep-821-19760492582bb8ac14e2c6c1]
Claims Not Directed to Elected Invention Withdrawn
Note:
Claims found not directed to the elected invention are withdrawn from further consideration by the examiner.

All claims that the examiner finds are not directed to the elected invention are withdrawn from further consideration by the examiner in accordance with 37 CFR 1.142(b). See MPEP § 821.01 through § 821.04. The examiner should clearly set forth in the Office action the reasons why the claims withdrawn from consideration are not readable on the elected invention. Applicant may traverse the requirement pursuant to 37 CFR 1.143. If a final requirement for restriction is made by the examiner, applicant may file a petition under 37 CFR 1.144 for review of the restriction requirement if the applicant made a timely traversal. See In re Hengehold, 440 F.2d 1395, 169 USPQ 473 (CCPA 1971). When an election results in the withdrawal of claims such that the assigned examiner believes the C* classification picture is incorrect, the examiner should submit a C* classification challenge prior to an action on the merits of the elected claims to ensure the C* classification picture on the application appropriately reflects the elected invention.

Jump to MPEP Source · 37 CFR 1.142(b)Restriction and ElectionElection Requirement (MPEP 808, 818)Restriction Requirement (MPEP 802-803)
StatutoryRecommendedAlways
[mpep-821-4b085b701859d7519bf2c204]
C* Classification Challenge Required After Claim Withdrawal
Note:
When claims are withdrawn due to an election, the examiner must submit a C* classification challenge before evaluating the elected claims to ensure proper classification.

All claims that the examiner finds are not directed to the elected invention are withdrawn from further consideration by the examiner in accordance with 37 CFR 1.142(b). See MPEP § 821.01 through § 821.04. The examiner should clearly set forth in the Office action the reasons why the claims withdrawn from consideration are not readable on the elected invention. Applicant may traverse the requirement pursuant to 37 CFR 1.143. If a final requirement for restriction is made by the examiner, applicant may file a petition under 37 CFR 1.144 for review of the restriction requirement if the applicant made a timely traversal. See In re Hengehold, 440 F.2d 1395, 169 USPQ 473 (CCPA 1971). When an election results in the withdrawal of claims such that the assigned examiner believes the C* classification picture is incorrect, the examiner should submit a C* classification challenge prior to an action on the merits of the elected claims to ensure the C* classification picture on the application appropriately reflects the elected invention.

Jump to MPEP Source · 37 CFR 1.142(b)Restriction and ElectionElection Requirement (MPEP 808, 818)Petition for Improper Restriction
Topic

Petition for Improper Restriction

2 rules
StatutoryPermittedAlways
[mpep-821-b9910feeb62b6d16177bd8e0]
Timely Traversal for Review of Restriction Requirement
Note:
If a final restriction requirement is made by the examiner, an applicant who timely traversed it may file a petition under 37 CFR 1.144 for review.

All claims that the examiner finds are not directed to the elected invention are withdrawn from further consideration by the examiner in accordance with 37 CFR 1.142(b). See MPEP § 821.01 through § 821.04. The examiner should clearly set forth in the Office action the reasons why the claims withdrawn from consideration are not readable on the elected invention. Applicant may traverse the requirement pursuant to 37 CFR 1.143. If a final requirement for restriction is made by the examiner, applicant may file a petition under 37 CFR 1.144 for review of the restriction requirement if the applicant made a timely traversal. See In re Hengehold, 440 F.2d 1395, 169 USPQ 473 (CCPA 1971). When an election results in the withdrawal of claims such that the assigned examiner believes the C* classification picture is incorrect, the examiner should submit a C* classification challenge prior to an action on the merits of the elected claims to ensure the C* classification picture on the application appropriately reflects the elected invention.

Jump to MPEP Source · 37 CFR 1.142(b)Petition for Improper RestrictionTraversal of Restriction RequirementReconsideration and Petition (MPEP 818.03)
StatutoryInformativeAlways
[mpep-821-d56859b548732961f407583c]
Requirement for Proper Restriction Election
Note:
The examiner must clearly state the reasons why withdrawn claims are not related to the elected invention and allow applicant to traverse the requirement.

All claims that the examiner finds are not directed to the elected invention are withdrawn from further consideration by the examiner in accordance with 37 CFR 1.142(b). See MPEP § 821.01 through § 821.04. The examiner should clearly set forth in the Office action the reasons why the claims withdrawn from consideration are not readable on the elected invention. Applicant may traverse the requirement pursuant to 37 CFR 1.143. If a final requirement for restriction is made by the examiner, applicant may file a petition under 37 CFR 1.144 for review of the restriction requirement if the applicant made a timely traversal. See In re Hengehold, 440 F.2d 1395, 169 USPQ 473 (CCPA 1971). When an election results in the withdrawal of claims such that the assigned examiner believes the C* classification picture is incorrect, the examiner should submit a C* classification challenge prior to an action on the merits of the elected claims to ensure the C* classification picture on the application appropriately reflects the elected invention.

Jump to MPEP Source · 37 CFR 1.142(b)Petition for Improper RestrictionElection of SpeciesTraversal of Restriction Requirement
Topic

Withdrawn Claims

1 rules
StatutoryRecommendedAlways
[mpep-821-0f8c665765780d938ddec04c]
Examiner Must Explain Why Withdrawn Claims Are Not Directed to Elected Invention
Note:
The examiner must provide clear reasons in the Office action why claims withdrawn from consideration are not related to the elected invention.

All claims that the examiner finds are not directed to the elected invention are withdrawn from further consideration by the examiner in accordance with 37 CFR 1.142(b). See MPEP § 821.01 through § 821.04. The examiner should clearly set forth in the Office action the reasons why the claims withdrawn from consideration are not readable on the elected invention. Applicant may traverse the requirement pursuant to 37 CFR 1.143. If a final requirement for restriction is made by the examiner, applicant may file a petition under 37 CFR 1.144 for review of the restriction requirement if the applicant made a timely traversal. See In re Hengehold, 440 F.2d 1395, 169 USPQ 473 (CCPA 1971). When an election results in the withdrawal of claims such that the assigned examiner believes the C* classification picture is incorrect, the examiner should submit a C* classification challenge prior to an action on the merits of the elected claims to ensure the C* classification picture on the application appropriately reflects the elected invention.

Jump to MPEP Source · 37 CFR 1.142(b)Withdrawn ClaimsElection Requirement (MPEP 808, 818)Examination Procedures
Topic

Election of Species

1 rules
StatutoryPermittedAlways
[mpep-821-4390625b87b5d9698e8f1f63]
Requirement for Traversing Non-Elected Claims Withdrawal
Note:
Applicant must state reasons why withdrawn claims are not related to the elected invention and may petition for review if a final restriction requirement is made.

All claims that the examiner finds are not directed to the elected invention are withdrawn from further consideration by the examiner in accordance with 37 CFR 1.142(b). See MPEP § 821.01 through § 821.04. The examiner should clearly set forth in the Office action the reasons why the claims withdrawn from consideration are not readable on the elected invention. Applicant may traverse the requirement pursuant to 37 CFR 1.143. If a final requirement for restriction is made by the examiner, applicant may file a petition under 37 CFR 1.144 for review of the restriction requirement if the applicant made a timely traversal. See In re Hengehold, 440 F.2d 1395, 169 USPQ 473 (CCPA 1971). When an election results in the withdrawal of claims such that the assigned examiner believes the C* classification picture is incorrect, the examiner should submit a C* classification challenge prior to an action on the merits of the elected claims to ensure the C* classification picture on the application appropriately reflects the elected invention.

Jump to MPEP Source · 37 CFR 1.142(b)Election of SpeciesTraversal of Restriction RequirementRestriction and Election
Topic

Patent Eligibility

1 rules
MPEP GuidancePermittedAlways
[mpep-821-88b6e797ee9e0435479d599c]
Claims to Nonelected Species Treated as Indicated
Note:
Claims drawn to nonelected species are treated according to MPEP sections 821.01 through 821.04.

Claims found to be drawn to nonelected inventions, including claims drawn to nonelected species or inventions that may be eligible for rejoinder, are treated as indicated in MPEP § 821.01 through § 821.04.

Jump to MPEP Source · 37 CFR 821.04Patent Eligibility

Citations

Primary topicCitation
Election of Species
Petition for Improper Restriction
Restriction and Election
Withdrawn Claims
37 CFR § 1.142(b)
Election of Species
Petition for Improper Restriction
Restriction and Election
Withdrawn Claims
37 CFR § 1.143
Election of Species
Petition for Improper Restriction
Restriction and Election
Withdrawn Claims
37 CFR § 1.144
Election of Species
Patent Eligibility
Petition for Improper Restriction
Restriction and Election
Withdrawn Claims
37 CFR § 821.04
Election of Species
Patent Eligibility
Petition for Improper Restriction
Restriction and Election
Withdrawn Claims
MPEP § 821.01
Election of Species
Petition for Improper Restriction
Restriction and Election
Withdrawn Claims
In re Hengehold, 440 F.2d 1395, 169 USPQ 473 (CCPA 1971)

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