MPEP § 817 — Outline of Letter for Restriction Requirement (Annotated Rules)

§817 Outline of Letter for Restriction Requirement

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

This page consolidates and annotates all enforceable requirements under MPEP § 817, 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.

Outline of Letter for Restriction Requirement

This section addresses Outline of Letter for Restriction Requirement. Contains: 2 guidance statements and 3 other statements.

Key Rules

Topic

AIA vs Pre-AIA Practice

5 rules
StatutoryPermittedAlways
[mpep-817-02c33f0e7333a7d1c2d75986]
Prior Art from Commonly Assigned Applications
Note:
If a commonly assigned application or patent is prior art under 35 U.S.C. 102(a)(2), a rejection may be made using specific form paragraphs.

5. If the commonly assigned application or patent is prior art under 35 U.S.C. 102(a)(2), a rejection may also be made using form paragraph 7.15.01.aia or 7.15.02.aia.

35 U.S.C.AIA vs Pre-AIA PracticeNovelty / Prior Art
StatutoryRecommendedAlways
[mpep-817-719f36826024b5d2a9afa76e]
Rejection Under AIA Provisions Required
Note:
Examiners must use form paragraphs 7.21.aia, 7.21.01.aia or 7.21.02.aia for rejections under 35 U.S.C. 102(a)(2) / 103 when appropriate.

2. A rejection under 35 U.S.C. 102(a)(2) / 103 using form paragraph 7.21.aia, 7.21.01.aia or 7.21.02.aia also should be made, as appropriate.

35 U.S.C.AIA vs Pre-AIA PracticeNovelty / Prior Art
MPEP GuidanceRequiredAlways
[mpep-817-bef2c13847336a101851ce63]
Claims Must Be for Same Invention
Note:
The claims in brackets 1 and 2 must cover the same invention. If one claim would be obvious from another, use a different form paragraph.

3. The claims listed in brackets 1 and 2 must be for the same invention. If one invention would have been obvious in view of the other, do not use this form paragraph; see form paragraph 8.28.aia.

MPEP § 817AIA vs Pre-AIA PracticeObviousness
MPEP GuidanceInformativeAlways
[mpep-817-32ce28345f518bab7b33ab40]
One Invention Not Obvious from Other
Note:
If one invention would have been obvious in view of the other, do not use this form paragraph; instead, refer to form paragraph 8.28.aia.

3. The claims listed in brackets 1 and 2 must be for the same invention. If one invention would have been obvious in view of the other, do not use this form paragraph; see form paragraph 8.28.aia.

MPEP § 817AIA vs Pre-AIA PracticeObviousness
MPEP GuidanceRequiredAlways
[mpep-817-0cdf609726262857b2f6fdb4]
Form Paragraph 8.28.01.aia Must Follow
Note:
This rule requires that paragraph 8.28.01.aia must be included after the specified paragraph in the application.

6. Form paragraph 8.28.01.aia MUST follow this paragraph.

MPEP § 817AIA vs Pre-AIA Practice
Topic

Restriction Requirement (MPEP 802-803)

3 rules
StatutoryRecommendedAlways
[mpep-817-654cb8afb41ffb97ab74f135]
Invention Grouping Required for Restriction Requirement
Note:
Form paragraphs 8.08 – 8.11 must be used to group inventions in the restriction requirement.

Form paragraphs 8.08 – 8.11 should be used to group inventions.

Jump to MPEP SourceRestriction Requirement (MPEP 802-803)Restriction and Election Practice (MPEP Chapter 800)
MPEP GuidanceRecommendedAlways
[mpep-817-823efdc9444501352b817d3b]
Requirement to Restrict Claim Groups
Note:
The requirement demands that claims be grouped according to their scope and directed to a combination, subcombination, process, apparatus, or product.
The following outline should be used to set forth a requirement to restrict.
  • (A) Statement of the requirement to restrict and that it is being made under 35 U.S.C. 121.
    • (1) Identify each group by Roman numeral.
    • (2) List claims in each group. Check accuracy of numbering of the claims; look for same claims in two groups; and look for omitted claims.
    • (3) Give short description of total extent of the subject matter claimed in each group, pointing out critical claims of different scope and identifying whether the claims are directed to a combination, subcombination, process, apparatus, or product.
    • (4) Classify each group.
Jump to MPEP SourceRestriction Requirement (MPEP 802-803)Restriction and Election Practice (MPEP Chapter 800)
MPEP GuidanceInformativeAlways
[mpep-817-e04f0c5de2cd56a6e9802e41]
Requirement for Describing Subject Matter of Each Group
Note:
This rule requires a brief description of the total extent of subject matter claimed in each group, identifying critical claims and their scope.

The following outline should be used to set forth a requirement to restrict.
(A) Statement of the requirement to restrict and that it is being made under 35 U.S.C. 121.

(3) Give short description of total extent of the subject matter claimed in each group, pointing out critical claims of different scope and identifying whether the claims are directed to a combination, subcombination, process, apparatus, or product.

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

35 U.S.C. 112(a) – Written Description & Enablement

2 rules
StatutoryInformativeAlways
[mpep-817-43cb0d372eba72b48f20ed57]
Requirement for Serious Search and Examination Burden Explanation
Note:
Explain the reason for a serious search and examination burden when inventions have separate statuses or require different fields of search.
2. In bracket 1 insert the applicable reason(s) why there is a serious search and/or examination burden.
  • -For a serious search burden list one or more of the following:
  • –the inventions have acquired a separate status in the art in view of their different classification;
  • –the inventions have acquired a separate status in the art due to their recognized divergent subject matter; and/or
  • –the inventions require a different field of search (e.g., searching different classes/subclasses or electronic resources, or employing different search strategies or search queries).
  • -For a serious examination burden explain the reason, such as non-prior art issues under 35 U.S.C. 101, pre-AIA 35 U.S.C. 112, first paragraph, and/or 35 U.S.C. 112(a) are relevant to one invention that are not relevant to the other invention(s).
35 U.S.C.35 U.S.C. 112(a) – Written Description & EnablementAIA vs Pre-AIA PracticeMaintenance Fee Payment
StatutoryInformativeAlways
[mpep-817-f2de9c3e4962e16f84c373d6]
Requirement for Different Examination Burdens on Inventions
Note:
The rule requires explaining a serious examination burden when non-prior art issues under 35 U.S.C. 101, pre-AIA 35 U.S.C. 112, first paragraph, and/or 35 U.S.C. 112(a) are relevant to one invention but not the other.

2. In bracket 1 insert the applicable reason(s) why there is a serious search and/or examination burden. -For a serious examination burden explain the reason, such as non-prior art issues under 35 U.S.C. 101, pre-AIA 35 U.S.C. 112, first paragraph, and/or 35 U.S.C. 112(a) are relevant to one invention that are not relevant to the other invention(s).

35 U.S.C.35 U.S.C. 112(a) – Written Description & EnablementAIA vs Pre-AIA PracticePatent Eligibility
Topic

Effective Filing Date Under 102 (MPEP 2152.01)

1 rules
StatutoryRecommendedAlways
[mpep-817-b7e59747fda5c3c63ba9ad3b]
Requirement for Common Assignee with Indistinct Claims Not Established as Commonly Owned
Note:
This rule applies when the application is commonly assigned with another that has indistinct claims but lacks evidence of common ownership before the effective filing date.

1. This form paragraph should be used when the application being examined is commonly assigned with an application or patent that includes claims patentably indistinct from those in the present application, but it has not been established that they were commonly owned or deemed to have been commonly owned not later than the effective filing date under 35 U.S.C. 100(i) of the claimed invention. See 35 U.S.C. 102(b)(2)(C) and 35 U.S.C. 102(c).

35 U.S.C.Effective Filing Date Under 102 (MPEP 2152.01)Novelty / Prior Art
Topic

Form Paragraph Usage

1 rules
MPEP GuidanceRequiredAlways
[mpep-817-06c22fc424c943038ddf45e4]
Form Paragraph 7.03.aia Required in Office Actions
Note:
This rule requires the inclusion of form paragraph 7.03.aia in any Office action that contains it.

1. Form paragraph 7.03.aia must be included in any Office action that contains this paragraph.

MPEP § 817Form Paragraph UsageForm ParagraphsExaminer's Action (37 CFR 1.104)

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.

¶ 8.08 ¶ 8.08 Restriction, Two Groupings

Restriction to one of the following inventions is required under 35 U.S.C. 121 :

I. Claim [1] , drawn to [2] , classified in [3] .

II. Claim [4] , drawn to [5] , classified [6] .

Examiner Note

In brackets 3 and 6, insert CPC subclass and main group/subgroup if classified in the Cooperative Patent Classification or USPC class and subclass if classified in the United States Patent Classification. For example, if examined in CPC, enter CPC main group xxx, subgroup yyy.

¶ 8.09 ¶ 8.09 Restriction, 3rd Grouping

III. Claim [1] , drawn to [2] , classified in [3] .

Examiner Note

In bracket 3, insert CPC subclass and main group/subgroup if classified in the Cooperative Patent Classification or USPC class and subclass if classified in the United States Patent Classification. For example, if examined in CPC, enter CPC main group xxx, subgroup yyy.

¶ 8.10 ¶ 8.10 Restriction, 4th Grouping

IV. Claim [1] , drawn to [2] , classified in [3] .

Examiner Note

In bracket 3, insert CPC subclass and main group/subgroup if classified in the Cooperative Patent Classification or USPC class and subclass if classified in the United States Patent Classification. For example, if examined in CPC, enter main group xxx, subgroup yyy.

¶ 8.11 ¶ 8.11 Restriction, Additional Groupings

[1] . Claim [2] , drawn to [3] , classified in [4] .

¶ 8.13 ¶ 8.13 Distinctness (Heading)

The inventions are independent or distinct, each from the other because:

Examiner Note

This form paragraph should be followed by one of form paragraphs 8.14 – 8.20.02 to show independence or distinctness.

¶ 8.21 ¶ 8.21 To Establish Burden AND Requirement for Election and Means for Traversal for all Restrictions, other than an Election of Species

Restriction for examination purposes as indicated is proper because all the inventions listed in this action are independent or distinct for the reasons given above and there would be a serious search and/or examination burden if restriction were not required because one or more of the following reasons apply:

[1] .

Applicant is advised that the reply to this requirement to be complete must include (i) an election of an invention to be examined even though the requirement may be traversed ( 37 CFR 1.143 ) and (ii) identification of the claims encompassing the elected invention.

The election of an invention may be made with or without traverse. To reserve a right to petition, the election must be made with traverse. If the reply does not distinctly and specifically point out supposed errors in the restriction requirement, the election shall be treated as an election without traverse. Traversal must be presented at the time of election in order to be considered timely. Failure to timely traverse the requirement will result in the loss of right to petition under 37 CFR 1.144 . If claims are added after the election, applicant must indicate which of these claims are readable upon the elected invention.

Should applicant traverse on the ground that the inventions are not patentably distinct, applicant should submit evidence or identify such evidence now of record showing the inventions to be obvious variants or clearly admit on the record that this is the case. In either instance, if the examiner finds one of the inventions unpatentable over the prior art, the evidence or admission may be used in a rejection under 35 U.S.C. 103 or pre-AIA 35 U.S.C. 103(a) of the other invention.

Citations

Primary topicCitation
Effective Filing Date Under 102 (MPEP 2152.01)35 U.S.C. § 100(i)
35 U.S.C. 112(a) – Written Description & Enablement35 U.S.C. § 101
AIA vs Pre-AIA Practice35 U.S.C. § 102(a)(2)
Effective Filing Date Under 102 (MPEP 2152.01)35 U.S.C. § 102(b)(2)(C)
Effective Filing Date Under 102 (MPEP 2152.01)35 U.S.C. § 102(c)
35 U.S.C. 112(a) – Written Description & Enablement35 U.S.C. § 112
35 U.S.C. 112(a) – Written Description & Enablement35 U.S.C. § 112(a)
Restriction Requirement (MPEP 802-803)35 U.S.C. § 121
MPEP § 806.05(c)
MPEP § 809.02(a)
Form Paragraph UsageForm Paragraph § 7.03
AIA vs Pre-AIA PracticeForm Paragraph § 7.15.01
AIA vs Pre-AIA PracticeForm Paragraph § 7.21
Form Paragraph § 8.01
Form Paragraph § 8.13
Form Paragraph § 8.21
Form Paragraph § 8.23.02
AIA vs Pre-AIA PracticeForm Paragraph § 8.28
AIA vs Pre-AIA PracticeForm Paragraph § 8.28.01
Form Paragraph § 8.31

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