MPEP § 806.04 — Genus and/or Species Inventions (Annotated Rules)

§806.04 Genus and/or Species Inventions

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

This page consolidates and annotates all enforceable requirements under MPEP § 806.04, 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.

Genus and/or Species Inventions

This section addresses Genus and/or Species Inventions. Primary authority: 37 CFR 1.141 and 37 CFR 1.146. Contains: 2 permissions and 1 other statement.

Key Rules

Topic

Restriction and Election Practice (MPEP Chapter 800)

2 rules
StatutoryPermittedAlways
[mpep-806-04-4eaf5d33037df426a53e9dce]
Restriction Between Species Is Proper If Independent or Distinct
Note:
If an application includes claims directed to different species within a generic claim, restriction between the species may be proper if they are independent or distinct. However, an allowable generic claim must link a reasonable number of species embraced thereby.

Where an application includes claims directed to different embodiments or species that could fall within the scope of a generic claim, restriction between the species may be proper if the species are independent or distinct. However, 37 CFR 1.141 provides that an allowable generic claim may link a reasonable number of species embraced thereby. The practice is set forth in 37 CFR 1.146.

Jump to MPEP Source · 37 CFR 1.141Restriction and Election Practice (MPEP Chapter 800)
StatutoryInformativeAlways
[mpep-806-04-32d1320676f4b4dd80808343]
Proper Species Restriction Between Different Embodiments
Note:
The rule requires that species within a generic claim be restricted if they are independent and distinct, but an allowable generic claim may link a reasonable number of species.

Where an application includes claims directed to different embodiments or species that could fall within the scope of a generic claim, restriction between the species may be proper if the species are independent or distinct. However, 37 CFR 1.141 provides that an allowable generic claim may link a reasonable number of species embraced thereby. The practice is set forth in 37 CFR 1.146.

Jump to MPEP Source · 37 CFR 1.141Restriction and Election Practice (MPEP Chapter 800)
Topic

Distinction Between Species

1 rules
StatutoryPermittedAlways
[mpep-806-04-e4fe22254fa9999025defec5]
Requirement for Electing a Species
Note:
The examiner may require the applicant to elect a specific species if no genus claim is found allowable and multiple patentably distinct species are claimed.

In the first action on an application containing a generic claim to a generic invention (genus) and claims to more than one patentably distinct species embraced thereby, the examiner may require the applicant in the reply to that action to elect a species of his or her invention to which his or her claim will be restricted if no claim to the genus is found to be allowable. However, if such application contains claims directed to more than a reasonable number of species, the examiner may require restriction of the claims to not more than a reasonable number of species before taking further action in the application.

Jump to MPEP Source · 37 CFR 1.146Distinction Between SpeciesDistinct Inventions (MPEP 802.01)Species Election Requirement (MPEP 808.01)
Topic

Species Election Requirement (MPEP 808.01)

1 rules
StatutoryInformativeAlways
[mpep-806-04-cf9e8e3baaf6c79014319d36]
Claims Must Include One or More Species
Note:
The rule requires that claims in an application must include at least one specific species of the invention as defined by MPEP § 806.04(e).

See MPEP § 806.04(d) for the definition of a generic claim, and MPEP § 806.04(e) for a discussion of claims that include one or more species.

Jump to MPEP Source · 37 CFR 1.146Species Election Requirement (MPEP 808.01)Election Requirement (MPEP 808, 818)Restriction and Election Practice (MPEP Chapter 800)

Citations

Primary topicCitation
Restriction and Election Practice (MPEP Chapter 800)37 CFR § 1.141
Restriction and Election Practice (MPEP Chapter 800)37 CFR § 1.146
Species Election Requirement (MPEP 808.01)MPEP § 806.04(d)
Species Election Requirement (MPEP 808.01)MPEP § 806.04(e)

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