MPEP § 821.04(b) — Rejoinder of Process Requiring an Allowable Product (Annotated Rules)

§821.04(b) Rejoinder of Process Requiring an Allowable Product

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

This page consolidates and annotates all enforceable requirements under MPEP § 821.04(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.

Rejoinder of Process Requiring an Allowable Product

This section addresses Rejoinder of Process Requiring an Allowable Product. Primary authority: 35 U.S.C. 121, 35 U.S.C. 101, and 35 U.S.C. 112. Contains: 2 requirements, 2 guidance statements, 2 permissions, and 4 other statements.

Key Rules

Topic

Manufacture (Article of Manufacture)

4 rules
StatutoryInformativeAlways
[mpep-821-04-b-cb3de9e086d4a3fbb4e82929]
Amendments to Add Process Claims Must Meet Requirements
Note:
Process claims added after allowance must depend from allowed product claims and comply with 35 U.S.C. sections 101, 102, 103, and 112.

Amendments submitted after allowance are governed by 37 CFR 1.312. Amendments to add only process claims which depend from or otherwise require all the limitations of an allowed product claim and which meet the requirements of 35 U.S.C. 101, 102, 103, and 112 may be entered.

Jump to MPEP Source · 37 CFR 1.312Manufacture (Article of Manufacture)Process (Method)Statutory Categories of Invention
StatutoryPermittedAlways
[mpep-821-04-b-1afa6d992e9ae2eddd90225e]
Process Claims Must Depend on Allowed Product Claim
Note:
Amendments can only add process claims that depend on an allowed product claim and meet statutory requirements.

Amendments submitted after allowance are governed by 37 CFR 1.312. Amendments to add only process claims which depend from or otherwise require all the limitations of an allowed product claim and which meet the requirements of 35 U.S.C. 101, 102, 103, and 112 may be entered.

Jump to MPEP Source · 37 CFR 1.312Manufacture (Article of Manufacture)Process (Method)Statutory Categories of Invention
StatutoryInformativeAlways
[mpep-821-04-b-5f0eb99732f27fc123b06d5f]
Amendment Denying Rejoinder of New Issues
Note:
An amendment that would allow product claims but require reconsideration of process claims with new issues like 35 U.S.C. 101 or 112 cannot be entered.

If an amendment after final rejection that otherwise complies with the requirements of 37 CFR 1.116 would place all the elected product claim(s) in condition for allowance and thereby require rejoinder of process claims that raise new issues requiring further consideration (e.g., issues under 35 U.S.C. 101 or 35 U.S.C. 112, first paragraph), the amendment could be denied entry. For example, if pending nonelected process claims depend from a finally rejected product claim, and the amendment (or affidavit or other evidence that could have been submitted earlier) submitted after final rejection, if entered, would put the product claim(s) in condition for allowance, entry of the amendment (or evidence submission) would not be required if it would raise new issues that would require further consideration, such as issues under 35 U.S.C. 101 or 35 U.S.C. 112, first paragraph necessitated by rejoinder of previously nonelected process claims.

Jump to MPEP Source · 37 CFR 1.116Manufacture (Article of Manufacture)Process (Method)Statutory Categories of Invention
StatutoryRequiredAlways
[mpep-821-04-b-98bb2b1ecf8c0c6ffb189def]
Amendment Not Required for New Issues
Note:
If an amendment after final rejection would resolve product claims but raise new issues like 35 U.S.C. 101 or 112, first paragraph, it is not required.

If an amendment after final rejection that otherwise complies with the requirements of 37 CFR 1.116 would place all the elected product claim(s) in condition for allowance and thereby require rejoinder of process claims that raise new issues requiring further consideration (e.g., issues under 35 U.S.C. 101 or 35 U.S.C. 112, first paragraph), the amendment could be denied entry. For example, if pending nonelected process claims depend from a finally rejected product claim, and the amendment (or affidavit or other evidence that could have been submitted earlier) submitted after final rejection, if entered, would put the product claim(s) in condition for allowance, entry of the amendment (or evidence submission) would not be required if it would raise new issues that would require further consideration, such as issues under 35 U.S.C. 101 or 35 U.S.C. 112, first paragraph necessitated by rejoinder of previously nonelected process claims.

Jump to MPEP Source · 37 CFR 1.116Manufacture (Article of Manufacture)Process (Method)Statutory Categories of Invention
Topic

Restriction and Election Practice (MPEP Chapter 800)

2 rules
StatutoryPermittedAlways
[mpep-821-04-b-4a326c2e13ed4f29e7c0bccc]
Election of Product or Process Claims Required
Note:
When an application includes claims for both a product and its process, the applicant must elect to pursue either the product or process claims. Failure to do so may result in the withdrawal of non-elected claims.

Where claims directed to a product and to a process of making and/or using the product are presented in the same application, applicant may be called upon under 35 U.S.C. 121 to elect claims to either the product or a process. See MPEP § 806.05(f) and § 806.05(h). The claims to the nonelected invention will be withdrawn from further consideration under 37 CFR 1.142. See MPEP § 821 through § 821.03. However, if applicant elects a claim(s) directed to a product which is subsequently found allowable, withdrawn process claims which depend from or otherwise require all the limitations of an allowable product claim will be considered for rejoinder. All claims directed to a nonelected process invention must depend from or otherwise require all the limitations of an allowable product claim for that process invention to be rejoined. Upon rejoinder of claims directed to a previously nonelected process invention, the restriction requirement between the elected product and rejoined process(es) will be withdrawn.

Jump to MPEP Source · 37 CFR 1.142Restriction and Election Practice (MPEP Chapter 800)Process Claims Rejoinder (MPEP 821.04(b))Rejoinder of Claims (MPEP 821.04)
MPEP GuidanceRecommendedAlways
[mpep-821-04-b-1713750e2055957212b99882]
Requirement for Restricting Product and Process Claims
Note:
The rule requires including form paragraph 8.21.04 in any restriction requirement between a product and its process of making or using it.

Form paragraph 8.21.04 should be included in any requirement for restriction between a product and a process of making or process of using the product. See MPEP § 806.05(f) and § 806.05(h).

Jump to MPEP Source · 37 CFR 806.05(h)Restriction and Election Practice (MPEP Chapter 800)Rejoinder of Claims (MPEP 821.04)
Topic

Process Claims Rejoinder (MPEP 821.04(b))

2 rules
StatutoryInformativeAlways
[mpep-821-04-b-43081287e2f7aab37be3f734]
Product Allowance Triggers Process Claim Rejoining
Note:
If a product claim is found allowable, related process claims that require all its limitations can be rejoined for further consideration.

Where claims directed to a product and to a process of making and/or using the product are presented in the same application, applicant may be called upon under 35 U.S.C. 121 to elect claims to either the product or a process. See MPEP § 806.05(f) and § 806.05(h). The claims to the nonelected invention will be withdrawn from further consideration under 37 CFR 1.142. See MPEP § 821 through § 821.03. However, if applicant elects a claim(s) directed to a product which is subsequently found allowable, withdrawn process claims which depend from or otherwise require all the limitations of an allowable product claim will be considered for rejoinder. All claims directed to a nonelected process invention must depend from or otherwise require all the limitations of an allowable product claim for that process invention to be rejoined. Upon rejoinder of claims directed to a previously nonelected process invention, the restriction requirement between the elected product and rejoined process(es) will be withdrawn.

Jump to MPEP Source · 37 CFR 1.142Process Claims Rejoinder (MPEP 821.04(b))Rejoinder of Claims (MPEP 821.04)Restriction and Election Practice (MPEP Chapter 800)
StatutoryRequiredAlways
[mpep-821-04-b-764267678b38ee4e7edd3c59]
Process Claims Must Depend on Allowable Product Claim
Note:
All claims directed to a nonelected process invention must depend from or require all limitations of an allowable product claim for rejoinder.

Where claims directed to a product and to a process of making and/or using the product are presented in the same application, applicant may be called upon under 35 U.S.C. 121 to elect claims to either the product or a process. See MPEP § 806.05(f) and § 806.05(h). The claims to the nonelected invention will be withdrawn from further consideration under 37 CFR 1.142. See MPEP § 821 through § 821.03. However, if applicant elects a claim(s) directed to a product which is subsequently found allowable, withdrawn process claims which depend from or otherwise require all the limitations of an allowable product claim will be considered for rejoinder. All claims directed to a nonelected process invention must depend from or otherwise require all the limitations of an allowable product claim for that process invention to be rejoined. Upon rejoinder of claims directed to a previously nonelected process invention, the restriction requirement between the elected product and rejoined process(es) will be withdrawn.

Jump to MPEP Source · 37 CFR 1.142Process Claims Rejoinder (MPEP 821.04(b))Rejoinder of Claims (MPEP 821.04)Restriction and Election Practice (MPEP Chapter 800)
Topic

Rejoinder of Claims (MPEP 821.04)

2 rules
StatutoryInformativeAlways
[mpep-821-04-b-c027c8e82cf76bce6e1e7199]
Rejoinder of Previously Nonelected Process Invention
Note:
Upon rejoinder of claims directed to a previously nonelected process invention, the restriction requirement between the elected product and rejoined process(es) will be withdrawn.

Where claims directed to a product and to a process of making and/or using the product are presented in the same application, applicant may be called upon under 35 U.S.C. 121 to elect claims to either the product or a process. See MPEP § 806.05(f) and § 806.05(h). The claims to the nonelected invention will be withdrawn from further consideration under 37 CFR 1.142. See MPEP § 821 through § 821.03. However, if applicant elects a claim(s) directed to a product which is subsequently found allowable, withdrawn process claims which depend from or otherwise require all the limitations of an allowable product claim will be considered for rejoinder. All claims directed to a nonelected process invention must depend from or otherwise require all the limitations of an allowable product claim for that process invention to be rejoined. Upon rejoinder of claims directed to a previously nonelected process invention, the restriction requirement between the elected product and rejoined process(es) will be withdrawn.

Jump to MPEP Source · 37 CFR 1.142Rejoinder of Claims (MPEP 821.04)Restriction and Election Practice (MPEP Chapter 800)Process Claims Rejoinder (MPEP 821.04(b))
StatutoryRecommendedAlways
[mpep-821-04-b-9df1fa2b56d2881f8752dc75]
Examiner Must Not Withdraw Restriction If Claims Cancelled Before Rejoinder
Note:
The examiner should not withdraw the restriction requirement if all claims directed to a nonelected process invention are canceled before rejoinder occurs, preserving applicant’s rights under 35 U.S.C. 121.

If applicant cancels all the claims directed to a nonelected process invention before rejoinder occurs, the examiner should not withdraw the restriction requirement. This will preserve applicant’s rights under 35 U.S.C. 121.

Jump to MPEP SourceRejoinder of Claims (MPEP 821.04)Restriction Requirement (MPEP 802-803)Restriction and Election Practice (MPEP Chapter 800)
Topic

Patent Eligibility

2 rules
StatutoryInformativeAlways
[mpep-821-04-b-36a3a4c0ab7850d966bc1a0d]
Amendments Submitted After Final Rejection Governed by 37 CFR 1.116
Note:
This rule requires that amendments submitted after a final rejection must follow the guidelines set out in 37 CFR 1.116, ensuring all claims to an elected product are considered for patentability.

Amendments submitted after final rejection are governed by 37 CFR 1.116. When all claims to the elected product are in condition for allowance, all process claims eligible for rejoinder (see MPEP § 821.04) must be considered for patentability.

Jump to MPEP Source · 37 CFR 1.116Patent Eligibility
StatutoryRequiredAlways
[mpep-821-04-b-85284e2f696fc2387c29228a]
Process Claims Eligible for Rejoinder Must Be Considered
Note:
When all claims to the elected product are in condition for allowance, process claims eligible for rejoinder must be evaluated for patentability.

Amendments submitted after final rejection are governed by 37 CFR 1.116. When all claims to the elected product are in condition for allowance, all process claims eligible for rejoinder (see MPEP § 821.04) must be considered for patentability.

Jump to MPEP Source · 37 CFR 1.116Patent Eligibility
Topic

Types of Office Actions

2 rules
StatutoryPermittedAlways
[mpep-821-04-b-d450677496c36fb5327bba55]
Opportunity to Cancel Process Claims After Product Allowance
Note:
If product claims are deemed allowable, applicant gets a chance to cancel process claims before receiving a new rejection notice.

In after final situations when no amendment or evidence is submitted, but applicant submits arguments that persuade the examiner that all the product claims are allowable, in effect the final rejection of the product claims is not sustainable, and any rejection of the rejoined process claims must be done in a new Office action. If the process claims would be rejected, applicant may be called before mailing a new Office action and given the opportunity to cancel the process claims and to place the application in condition for allowance with the allowable product claims. If a new Office action is prepared indicating the allowability of the product claim and including a new rejection of the process claims, the provisions of MPEP § 706.07 govern the propriety of making the Office action final.

Jump to MPEP SourceTypes of Office ActionsExaminer's Action (37 CFR 1.104)Examination Procedures
StatutoryInformativeAlways
[mpep-821-04-b-3994e14df9487e554d91bf02]
New Office Action for Process Claims After Product Allowance
Note:
If a new Office action indicates product claims are allowable but rejections process claims, MPEP § 706.07 governs making the action final.

In after final situations when no amendment or evidence is submitted, but applicant submits arguments that persuade the examiner that all the product claims are allowable, in effect the final rejection of the product claims is not sustainable, and any rejection of the rejoined process claims must be done in a new Office action. If the process claims would be rejected, applicant may be called before mailing a new Office action and given the opportunity to cancel the process claims and to place the application in condition for allowance with the allowable product claims. If a new Office action is prepared indicating the allowability of the product claim and including a new rejection of the process claims, the provisions of MPEP § 706.07 govern the propriety of making the Office action final.

Jump to MPEP SourceTypes of Office ActionsNew Grounds of RejectionExaminer's Action (37 CFR 1.104)
Topic

Final Office Action

1 rules
StatutoryRequiredAlways
[mpep-821-04-b-7fce6ee40b08e61945fa7849]
Final Rejection of Product Claims Not Sustainable After Persuasive Arguments
Note:
If persuasive arguments are submitted without amendments, the final rejection of product claims is not sustainable and process claims must be addressed in a new Office action.

In after final situations when no amendment or evidence is submitted, but applicant submits arguments that persuade the examiner that all the product claims are allowable, in effect the final rejection of the product claims is not sustainable, and any rejection of the rejoined process claims must be done in a new Office action. If the process claims would be rejected, applicant may be called before mailing a new Office action and given the opportunity to cancel the process claims and to place the application in condition for allowance with the allowable product claims. If a new Office action is prepared indicating the allowability of the product claim and including a new rejection of the process claims, the provisions of MPEP § 706.07 govern the propriety of making the Office action final.

Jump to MPEP SourceFinal Office ActionAmendments Adding New MatterTypes of Office Actions
Topic

First Action on Merits (FAOM)

1 rules
StatutoryPermittedAlways
[mpep-821-04-b-dddcce597cd57d9fb0a4cd55]
Rejoined Claims After First Office Action Must Be Supported
Note:
If claims rejoined after the first office action on merits are unpatentable, the next office action may be made final if proper under MPEP § 706.07(a).

5. If rejoinder occurs after the first Office action on the merits and if any of the rejoined claims are unpatentable, e.g., if a rejection under 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph is made, then the next Office action may be made final if proper under MPEP § 706.07(a).

35 U.S.C.First Action on Merits (FAOM)First Action on MeritsNon-Final Action Content

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.

¶ 8.42 ¶ 8.42 Allowable Product, Rejoinder of at Least One Process Claim, Less Than All Claims

Claim [1] directed to an allowable product. Pursuant to the procedures set forth in MPEP § 821.04(b) , claim [2] , directed to the process of making or using the allowable product, previously withdrawn from consideration as a result of a restriction requirement, [3] hereby rejoined and fully examined for patentability under 37 CFR 1.104 . Claim [4], directed to the invention(s) of [5] require all the limitations of an allowable product claim, and [6] NOT been rejoined.

Because a claimed invention previously withdrawn from consideration under 37 CFR 1.142 has been rejoined, the restriction requirement [7] groups [8] as set forth in the Office action mailed on [9] is hereby withdrawn. In view of the withdrawal of the restriction requirement as to the rejoined inventions, applicant(s) are advised that if any claim presented in a divisional application is anticipated by, or includes all the limitations of, a claim that is allowable in the present application, such claim may be subject to provisional statutory and/or nonstatutory double patenting rejections over the claims of the instant application.

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

¶ 8.43 ¶ 8.43 Allowable Product, Rejoinder of All Previously Withdrawn Process Claims

Claim [1] directed to an allowable product. Pursuant to the procedures set forth in MPEP § 821.04(b) , claim [2] , directed to the process of making or using an allowable product, previously withdrawn from consideration as a result of a restriction requirement, [3] hereby rejoined and fully examined for patentability under 37 CFR 1.104.

Because all claims previously withdrawn from consideration under 37 CFR 1.142 have been rejoined, the restriction requirement as set forth in the Office action mailed on [4] is hereby withdrawn. In view of the withdrawal of the restriction requirement as to the rejoined inventions, applicant(s) are advised that if any claim presented in a divisional application is anticipated by, or includes all the limitations of, a claim that is allowable in the present application, such claim may be subject to provisional statutory and/or nonstatutory double patenting rejections over the claims of the instant application.

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

Citations

Primary topicCitation
Manufacture (Article of Manufacture)35 U.S.C. § 101
First Action on Merits (FAOM)
Manufacture (Article of Manufacture)
35 U.S.C. § 112
First Action on Merits (FAOM)35 U.S.C. § 112(a)
Process Claims Rejoinder (MPEP 821.04(b))
Rejoinder of Claims (MPEP 821.04)
Restriction and Election Practice (MPEP Chapter 800)
35 U.S.C. § 121
Manufacture (Article of Manufacture)
Patent Eligibility
37 CFR § 1.116
37 CFR § 1.121
Process Claims Rejoinder (MPEP 821.04(b))
Rejoinder of Claims (MPEP 821.04)
Restriction and Election Practice (MPEP Chapter 800)
37 CFR § 1.142
Manufacture (Article of Manufacture)37 CFR § 1.312
Process Claims Rejoinder (MPEP 821.04(b))
Rejoinder of Claims (MPEP 821.04)
Restriction and Election Practice (MPEP Chapter 800)
37 CFR § 806.05(h)
Process Claims Rejoinder (MPEP 821.04(b))
Rejoinder of Claims (MPEP 821.04)
Restriction and Election Practice (MPEP Chapter 800)
37 CFR § 821.03
Final Office Action
Types of Office Actions
MPEP § 706.07
First Action on Merits (FAOM)MPEP § 706.07(a)
Process Claims Rejoinder (MPEP 821.04(b))
Rejoinder of Claims (MPEP 821.04)
Restriction and Election Practice (MPEP Chapter 800)
MPEP § 806.05(f)
Process Claims Rejoinder (MPEP 821.04(b))
Rejoinder of Claims (MPEP 821.04)
Restriction and Election Practice (MPEP Chapter 800)
MPEP § 821
MPEP § 821.03
Patent EligibilityMPEP § 821.04
MPEP § 821.04(b)
Restriction and Election Practice (MPEP Chapter 800)Form Paragraph § 8.21.04
Form Paragraph § 8.42
Form Paragraph § 8.43

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