MPEP § 806.04(b) — Species May Be Independent or Related Inventions (Annotated Rules)

§806.04(b) Species May Be Independent or Related Inventions

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

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

Species May Be Independent or Related Inventions

This section addresses Species May Be Independent or Related Inventions. Primary authority: 37 CFR 806.06 and 37 CFR 806.05(j). Contains: 2 requirements, 2 permissions, and 1 other statement.

Key Rules

Topic

Species Election Requirement (MPEP 808.01)

2 rules
MPEP GuidancePermittedAlways
[mpep-806-04-b-aeaf31d977d9b97a48185518]
Species Must Be Independent or Related Inventions
Note:
Invention species must either be independent inventions or related to a common generic invention.

For example, two different subcombinations usable with each other may each be a species of some common generic invention. If so, restriction practice under election of species and the practice applicable to restriction between combination and subcombinations must be addressed.

Jump to MPEP SourceSpecies Election Requirement (MPEP 808.01)Election Requirement (MPEP 808, 818)Restriction and Election Practice (MPEP Chapter 800)
MPEP GuidanceRequiredAlways
[mpep-806-04-b-99b4313dfd5376a21ecc6470]
Restriction Practice for Species and Combinations
Note:
When two different subcombinations are usable with each other, the requirement to address restriction practice under election of species and between combination and subcombinations must be followed.

For example, two different subcombinations usable with each other may each be a species of some common generic invention. If so, restriction practice under election of species and the practice applicable to restriction between combination and subcombinations must be addressed.

Jump to MPEP SourceSpecies Election Requirement (MPEP 808.01)Election Requirement (MPEP 808, 818)Restriction and Election Practice (MPEP Chapter 800)
Topic

Restriction Requirement (MPEP 802-803)

1 rules
MPEP GuidanceRequiredAlways
[mpep-806-04-b-56db9dbdc71feb30805cdac4]
Intermediate and Final Product Relationship Requires Distinctness
Note:
To sustain a restriction requirement for carbon compounds, distinctness must be shown between intermediate and final products as they are not independent.

As a further example, species of carbon compounds may be related to each other as intermediate and final product. Thus, these species are not independent and in order to sustain a restriction requirement, distinctness must be shown. Distinctness is proven if the claims to the intermediate and final products do not overlap in scope (i.e., a claim to the final product does not read on the intermediate, and vice versa) and are not obvious variants and it can be shown that the intermediate product is useful other than to make the final product. Otherwise, the disclosed relationship would preclude their being issued in separate patents. See MPEP § 806.05(j) for restriction practice pertaining to related products, including intermediate-final product relationships.

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

35 U.S.C. 103 – Obviousness

1 rules
MPEP GuidancePermittedAlways
[mpep-806-04-b-33134b191434cd490a17f6af]
Requirement for Proving Distinctness of Intermediate and Final Products
Note:
Prove that claims to intermediate and final products do not overlap in scope, are not obvious variants, and the intermediate product has utility beyond making the final product.

As a further example, species of carbon compounds may be related to each other as intermediate and final product. Thus, these species are not independent and in order to sustain a restriction requirement, distinctness must be shown. Distinctness is proven if the claims to the intermediate and final products do not overlap in scope (i.e., a claim to the final product does not read on the intermediate, and vice versa) and are not obvious variants and it can be shown that the intermediate product is useful other than to make the final product. Otherwise, the disclosed relationship would preclude their being issued in separate patents. See MPEP § 806.05(j) for restriction practice pertaining to related products, including intermediate-final product relationships.

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

Restriction and Election Practice (MPEP Chapter 800)

1 rules
MPEP GuidanceInformativeAlways
[mpep-806-04-b-03360a403abb6a8fe9ac25e9]
Requirement for Distinct Claims for Intermediate and Final Products
Note:
Claims to intermediate and final products must be distinct and not obvious variants to receive separate patents.

As a further example, species of carbon compounds may be related to each other as intermediate and final product. Thus, these species are not independent and in order to sustain a restriction requirement, distinctness must be shown. Distinctness is proven if the claims to the intermediate and final products do not overlap in scope (i.e., a claim to the final product does not read on the intermediate, and vice versa) and are not obvious variants and it can be shown that the intermediate product is useful other than to make the final product. Otherwise, the disclosed relationship would preclude their being issued in separate patents. See MPEP § 806.05(j) for restriction practice pertaining to related products, including intermediate-final product relationships.

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

Citations

Primary topicCitation
37 CFR § 806.05(j)
37 CFR § 806.06
MPEP § 802.01
MPEP § 806.05
35 U.S.C. 103 – Obviousness
Restriction Requirement (MPEP 802-803)
Restriction and Election Practice (MPEP Chapter 800)
MPEP § 806.05(j)

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