MPEP § 809.03 — Restriction Between Linked Inventions (Annotated Rules)

§809.03 Restriction Between Linked Inventions

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

This page consolidates and annotates all enforceable requirements under MPEP § 809.03, 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.

Restriction Between Linked Inventions

This section addresses Restriction Between Linked Inventions. Primary authority: 37 CFR 821.04. Contains: 3 guidance statements.

Key Rules

Topic

Form Paragraph Usage

2 rules
MPEP GuidanceRecommendedAlways
[mpep-809-03-6812c3a3854577deba9d247b]
Use Form Paragraph for Linking Claim Restrictions
Note:
Examiners must use form paragraph 8.12 to restrict claims when the linking claim is not a genus claim.

Where an application includes two or more otherwise properly divisible inventions that are linked by a claim which, if allowable, would require rejoinder (See MPEP § 809 and § 821.04), the examiner should require restriction, either by a written Office action that includes only a restriction requirement or by a telephoned requirement to restrict (the latter being encouraged). Examiners should use form paragraph 8.12 to make restrictions involving linking claims when the linking claim is other than a genus claim linking species inventions. When the linking claim is a genus claim linking species inventions, examiners should use form paragraph 8.01 or 8.02 (see MPEP § 809.02(a)).

Jump to MPEP Source · 37 CFR 821.04Form Paragraph UsageForm ParagraphsExaminer's Action (37 CFR 1.104)
MPEP GuidanceRecommendedAlways
[mpep-809-03-eedbb14bf84f4a3b303f7f6b]
Examiner Use Form Paragraphs 8.01 or 8.02 for Genus Claim Linking Species Inventions
Note:
When the linking claim is a genus claim linking species inventions, examiners should use form paragraphs 8.01 or 8.02 to make restrictions.

Where an application includes two or more otherwise properly divisible inventions that are linked by a claim which, if allowable, would require rejoinder (See MPEP § 809 and § 821.04), the examiner should require restriction, either by a written Office action that includes only a restriction requirement or by a telephoned requirement to restrict (the latter being encouraged). Examiners should use form paragraph 8.12 to make restrictions involving linking claims when the linking claim is other than a genus claim linking species inventions. When the linking claim is a genus claim linking species inventions, examiners should use form paragraph 8.01 or 8.02 (see MPEP § 809.02(a)).

Jump to MPEP Source · 37 CFR 821.04Form Paragraph UsageForm ParagraphsExaminer's Action (37 CFR 1.104)
Topic

Linking Claims (MPEP 809)

1 rules
StatutoryRequiredAlways
[mpep-809-03-6fe6c5cef6c8167e31ed2f27]
Requirement for Restriction with Linking Claim
Note:
A restriction requirement must include this form paragraph if it contains at least one linking claim.

1. This form paragraph must be included in any restriction requirement with at least one linking claim present.

35 U.S.C.Linking Claims (MPEP 809)Restriction Requirement (MPEP 802-803)Restriction and Election Practice (MPEP Chapter 800)
Topic

Restriction Requirement (MPEP 802-803)

1 rules
StatutoryInformativeAlways
[mpep-809-03-c6d8f870a741e8830a044aaa]
Traverse Restriction with Linking Claims
Note:
Examiner Note: This rule explains how to traverse a restriction requirement when linking claims, referring to MPEP § 818.01(d).

For traverse of a restriction requirement with linking claims, see MPEP § 818.01(d).

Jump to MPEP SourceRestriction Requirement (MPEP 802-803)Restriction and Election Practice (MPEP Chapter 800)
Topic

Examiner's Action (37 CFR 1.104)

1 rules
MPEP GuidanceRecommendedAlways
[mpep-809-03-c9ccc4c6f56b2a5eada4bfde]
Requirement for Restricting Linked Inventions
Note:
Examiners must require restriction of an application containing linked inventions that would necessitate rejoinder if allowable.

Where an application includes two or more otherwise properly divisible inventions that are linked by a claim which, if allowable, would require rejoinder (See MPEP § 809 and § 821.04), the examiner should require restriction, either by a written Office action that includes only a restriction requirement or by a telephoned requirement to restrict (the latter being encouraged). Examiners should use form paragraph 8.12 to make restrictions involving linking claims when the linking claim is other than a genus claim linking species inventions. When the linking claim is a genus claim linking species inventions, examiners should use form paragraph 8.01 or 8.02 (see MPEP § 809.02(a)).

Jump to MPEP Source · 37 CFR 821.04Examiner's Action (37 CFR 1.104)Examination ProceduresForm Paragraph Usage

Examiner Form Paragraphs

Examiner form paragraphs are standard language that you might see in an Office Action or communication from the USPTO. Examiners have latitude to change the form paragraphs, but you will often see this exact language.

¶ 8.12 ¶ 8.12 Restriction, Linking Claims

Claim [1] link(s) inventions [2] and [3] . The restriction requirement [4] the linked inventions is subject to the nonallowance of the linking claim(s), claim [5] . Upon the indication of allowability of the linking claim(s), the restriction requirement as to the linked inventions shall be withdrawn and any claim(s) depending from or otherwise requiring all the limitations of the allowable linking claim(s) will be rejoined and fully examined for patentability in accordance with 37 CFR 1.104. Claims that require all the limitations of an allowable linking claim will be entered as a matter of right if the amendment is presented prior to final rejection or allowance, whichever is earlier. Amendments submitted after final rejection are governed by 37 CFR 1.116 ; amendments submitted after allowance are governed by 37 CFR 1.312 .

Applicant(s) are advised that if any claim presented in a divisional application is anticipated by, or includes all the limitations of, the allowable linking claim, such claim may be subject to provisional statutory and/or nonstatutory double patenting rejections over the claims of the instant application.

Where a restriction requirement is withdrawn, the provisions of 35 U.S.C. 121 are no longer applicable. In re Ziegler, 443 F.2d 1211, 1215, 170 USPQ 129, 131-32 (CCPA 1971). See also MPEP § 804.01 .

Citations

Primary topicCitation
Examiner's Action (37 CFR 1.104)
Form Paragraph Usage
37 CFR § 821.04
Examiner's Action (37 CFR 1.104)
Form Paragraph Usage
MPEP § 809
Examiner's Action (37 CFR 1.104)
Form Paragraph Usage
MPEP § 809.02(a)
Restriction Requirement (MPEP 802-803)MPEP § 818.01(d)
MPEP § 821
Examiner's Action (37 CFR 1.104)
Form Paragraph Usage
Form Paragraph § 8.01
Examiner's Action (37 CFR 1.104)
Form Paragraph Usage
Form Paragraph § 8.12

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