MPEP § 2244 — Prior Art on Which the Determination Is Based in Requests Filed under 35 U.S.C. 302 (Annotated Rules)

§2244 Prior Art on Which the Determination Is Based in Requests Filed under 35 U.S.C. 302

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

This page consolidates and annotates all enforceable requirements under MPEP § 2244, 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.

Prior Art on Which the Determination Is Based in Requests Filed under 35 U.S.C. 302

This section addresses Prior Art on Which the Determination Is Based in Requests Filed under 35 U.S.C. 302. Primary authority: 35 U.S.C. 303(a), 37 CFR 1.515(a), and 37 CFR 1.501. Contains: 1 guidance statement, 4 permissions, and 4 other statements.

Key Rules

Topic

Request Content Requirements

4 rules
StatutoryPermittedAlways
[mpep-2244-a39e6da05dd6c5f85254dd53]
Examiner Can Use Any Prior Art In Determining Substantial New Question of Patentability
Note:
The examiner is permitted to base the determination on any prior art patents or printed publications, not limited to those cited in the request.

The determination under 35 U.S.C. 303(a) whether or not “a substantial new question of patentability” is present can be based upon any prior art patents or printed publications. 35 U.S.C. 303(a) and 37 CFR 1.515(a) provide that the determination on a request will be made “with or without consideration of other patents or printed publications,” i.e., other than those relied upon in the request. The examiner is not limited in making the determination based on the patents and printed publications relied on in the request. The examiner can find “a substantial new question of patentability” based upon the prior art patents or printed publications relied on in the request, a combination of the prior art relied on in the request and other prior art found elsewhere, or based entirely on different patents or printed publications. The primary source of patents and printed publications used in making the determination are those relied on in the request. For reexamination ordered on or after November 2, 2002, see MPEP § 2242, subsection II.A. for a discussion of “old art.” The examiner can also consider any patents and printed publications of record in the patent file from submissions under 37 CFR 1.501 which are in compliance with 37 CFR 1.98 in making the determination. If the examiner believes that additional prior art patents and publications can be readily obtained by searching to supply any deficiencies in the prior art cited in the request, the examiner can perform such an additional search. Such a search should be limited to that area most likely to contain the deficiency of the prior art previously considered and should be made only where there is a reasonable likelihood that prior art can be found to supply any deficiency necessary to “a substantial new question of patentability.”

Jump to MPEP Source · 37 CFR 1.515(a)Request Content RequirementsSNQ CriteriaPrior Consideration of Art
StatutoryPermittedAlways
[mpep-2244-9fc17cff9f8fae651410c580]
Examiner Can Use Multiple Sources for Determining Patentability
Note:
The examiner can base the determination of a substantial new question of patentability on prior art from the request, additional sources, or entirely different patents and publications.

The determination under 35 U.S.C. 303(a) whether or not “a substantial new question of patentability” is present can be based upon any prior art patents or printed publications. 35 U.S.C. 303(a) and 37 CFR 1.515(a) provide that the determination on a request will be made “with or without consideration of other patents or printed publications,” i.e., other than those relied upon in the request. The examiner is not limited in making the determination based on the patents and printed publications relied on in the request. The examiner can find “a substantial new question of patentability” based upon the prior art patents or printed publications relied on in the request, a combination of the prior art relied on in the request and other prior art found elsewhere, or based entirely on different patents or printed publications. The primary source of patents and printed publications used in making the determination are those relied on in the request. For reexamination ordered on or after November 2, 2002, see MPEP § 2242, subsection II.A. for a discussion of “old art.” The examiner can also consider any patents and printed publications of record in the patent file from submissions under 37 CFR 1.501 which are in compliance with 37 CFR 1.98 in making the determination. If the examiner believes that additional prior art patents and publications can be readily obtained by searching to supply any deficiencies in the prior art cited in the request, the examiner can perform such an additional search. Such a search should be limited to that area most likely to contain the deficiency of the prior art previously considered and should be made only where there is a reasonable likelihood that prior art can be found to supply any deficiency necessary to “a substantial new question of patentability.”

Jump to MPEP Source · 37 CFR 1.515(a)Request Content RequirementsSNQ CriteriaPrior Consideration of Art
StatutoryPermittedAlways
[mpep-2244-b1983692567e6c9c24c7dc0f]
Examiner Can Perform Additional Search for Deficiencies in Requested Prior Art
Note:
The examiner may conduct an additional search to find missing prior art that could raise a new question of patentability if they believe such deficiencies can be readily obtained.

The determination under 35 U.S.C. 303(a) whether or not “a substantial new question of patentability” is present can be based upon any prior art patents or printed publications. 35 U.S.C. 303(a) and 37 CFR 1.515(a) provide that the determination on a request will be made “with or without consideration of other patents or printed publications,” i.e., other than those relied upon in the request. The examiner is not limited in making the determination based on the patents and printed publications relied on in the request. The examiner can find “a substantial new question of patentability” based upon the prior art patents or printed publications relied on in the request, a combination of the prior art relied on in the request and other prior art found elsewhere, or based entirely on different patents or printed publications. The primary source of patents and printed publications used in making the determination are those relied on in the request. For reexamination ordered on or after November 2, 2002, see MPEP § 2242, subsection II.A. for a discussion of “old art.” The examiner can also consider any patents and printed publications of record in the patent file from submissions under 37 CFR 1.501 which are in compliance with 37 CFR 1.98 in making the determination. If the examiner believes that additional prior art patents and publications can be readily obtained by searching to supply any deficiencies in the prior art cited in the request, the examiner can perform such an additional search. Such a search should be limited to that area most likely to contain the deficiency of the prior art previously considered and should be made only where there is a reasonable likelihood that prior art can be found to supply any deficiency necessary to “a substantial new question of patentability.”

Jump to MPEP Source · 37 CFR 1.515(a)Request Content RequirementsPrior Consideration of ArtEx Parte Reexamination Request
StatutoryRecommendedAlways
[mpep-2244-5c19eb28949a60d3591fab1c]
Search Must Be Relevant to Deficiency
Note:
The search should focus on areas likely to contain prior art that addresses deficiencies in the initial consideration and must have a reasonable likelihood of finding relevant prior art.

The determination under 35 U.S.C. 303(a) whether or not “a substantial new question of patentability” is present can be based upon any prior art patents or printed publications. 35 U.S.C. 303(a) and 37 CFR 1.515(a) provide that the determination on a request will be made “with or without consideration of other patents or printed publications,” i.e., other than those relied upon in the request. The examiner is not limited in making the determination based on the patents and printed publications relied on in the request. The examiner can find “a substantial new question of patentability” based upon the prior art patents or printed publications relied on in the request, a combination of the prior art relied on in the request and other prior art found elsewhere, or based entirely on different patents or printed publications. The primary source of patents and printed publications used in making the determination are those relied on in the request. For reexamination ordered on or after November 2, 2002, see MPEP § 2242, subsection II.A. for a discussion of “old art.” The examiner can also consider any patents and printed publications of record in the patent file from submissions under 37 CFR 1.501 which are in compliance with 37 CFR 1.98 in making the determination. If the examiner believes that additional prior art patents and publications can be readily obtained by searching to supply any deficiencies in the prior art cited in the request, the examiner can perform such an additional search. Such a search should be limited to that area most likely to contain the deficiency of the prior art previously considered and should be made only where there is a reasonable likelihood that prior art can be found to supply any deficiency necessary to “a substantial new question of patentability.”

Jump to MPEP Source · 37 CFR 1.515(a)Request Content RequirementsSNQ CriteriaPrior Consideration of Art
Topic

Ex Parte Reexamination Request

3 rules
StatutoryInformativeAlways
[mpep-2244-564c4ccfb5496025090aeed2]
Examiner Can Use Any Prior Art
Note:
The examiner is not limited to the prior art cited in the request and can consider any patents or printed publications when determining if a substantial new question of patentability exists.

The determination under 35 U.S.C. 303(a) whether or not “a substantial new question of patentability” is present can be based upon any prior art patents or printed publications. 35 U.S.C. 303(a) and 37 CFR 1.515(a) provide that the determination on a request will be made “with or without consideration of other patents or printed publications,” i.e., other than those relied upon in the request. The examiner is not limited in making the determination based on the patents and printed publications relied on in the request. The examiner can find “a substantial new question of patentability” based upon the prior art patents or printed publications relied on in the request, a combination of the prior art relied on in the request and other prior art found elsewhere, or based entirely on different patents or printed publications. The primary source of patents and printed publications used in making the determination are those relied on in the request. For reexamination ordered on or after November 2, 2002, see MPEP § 2242, subsection II.A. for a discussion of “old art.” The examiner can also consider any patents and printed publications of record in the patent file from submissions under 37 CFR 1.501 which are in compliance with 37 CFR 1.98 in making the determination. If the examiner believes that additional prior art patents and publications can be readily obtained by searching to supply any deficiencies in the prior art cited in the request, the examiner can perform such an additional search. Such a search should be limited to that area most likely to contain the deficiency of the prior art previously considered and should be made only where there is a reasonable likelihood that prior art can be found to supply any deficiency necessary to “a substantial new question of patentability.”

Jump to MPEP Source · 37 CFR 1.515(a)Ex Parte Reexamination RequestEx Parte ReexaminationRequest Content Requirements
StatutoryInformativeAlways
[mpep-2244-94d2329e1258d3594798a28c]
Primary Source of Patents and Publications for Ex Parte Reexamination
Note:
The primary source of patents and printed publications used in determining 'a substantial new question of patentability' is those relied upon in the request.

The determination under 35 U.S.C. 303(a) whether or not “a substantial new question of patentability” is present can be based upon any prior art patents or printed publications. 35 U.S.C. 303(a) and 37 CFR 1.515(a) provide that the determination on a request will be made “with or without consideration of other patents or printed publications,” i.e., other than those relied upon in the request. The examiner is not limited in making the determination based on the patents and printed publications relied on in the request. The examiner can find “a substantial new question of patentability” based upon the prior art patents or printed publications relied on in the request, a combination of the prior art relied on in the request and other prior art found elsewhere, or based entirely on different patents or printed publications. The primary source of patents and printed publications used in making the determination are those relied on in the request. For reexamination ordered on or after November 2, 2002, see MPEP § 2242, subsection II.A. for a discussion of “old art.” The examiner can also consider any patents and printed publications of record in the patent file from submissions under 37 CFR 1.501 which are in compliance with 37 CFR 1.98 in making the determination. If the examiner believes that additional prior art patents and publications can be readily obtained by searching to supply any deficiencies in the prior art cited in the request, the examiner can perform such an additional search. Such a search should be limited to that area most likely to contain the deficiency of the prior art previously considered and should be made only where there is a reasonable likelihood that prior art can be found to supply any deficiency necessary to “a substantial new question of patentability.”

Jump to MPEP Source · 37 CFR 1.515(a)Ex Parte Reexamination RequestEx Parte ReexaminationRequest Content Requirements
StatutoryPermittedAlways
[mpep-2244-0cab6f64e589f349a35faab7]
Examiner Can Consider Patent File Submissions in Determination
Note:
The examiner is permitted to review patents and printed publications from submissions under 37 CFR 1.501 that comply with 37 CFR 1.98 when making a determination on an ex parte reexamination request.

The determination under 35 U.S.C. 303(a) whether or not “a substantial new question of patentability” is present can be based upon any prior art patents or printed publications. 35 U.S.C. 303(a) and 37 CFR 1.515(a) provide that the determination on a request will be made “with or without consideration of other patents or printed publications,” i.e., other than those relied upon in the request. The examiner is not limited in making the determination based on the patents and printed publications relied on in the request. The examiner can find “a substantial new question of patentability” based upon the prior art patents or printed publications relied on in the request, a combination of the prior art relied on in the request and other prior art found elsewhere, or based entirely on different patents or printed publications. The primary source of patents and printed publications used in making the determination are those relied on in the request. For reexamination ordered on or after November 2, 2002, see MPEP § 2242, subsection II.A. for a discussion of “old art.” The examiner can also consider any patents and printed publications of record in the patent file from submissions under 37 CFR 1.501 which are in compliance with 37 CFR 1.98 in making the determination. If the examiner believes that additional prior art patents and publications can be readily obtained by searching to supply any deficiencies in the prior art cited in the request, the examiner can perform such an additional search. Such a search should be limited to that area most likely to contain the deficiency of the prior art previously considered and should be made only where there is a reasonable likelihood that prior art can be found to supply any deficiency necessary to “a substantial new question of patentability.”

Jump to MPEP Source · 37 CFR 1.515(a)Ex Parte Reexamination RequestEx Parte ReexaminationRequest Content Requirements
Topic

SNQ Criteria

1 rules
StatutoryInformativeAlways
[mpep-2244-479e82d114da5111970384bc]
Examiner Can Use Any Prior Art for SNQ Determination
Note:
The examiner can base the determination of a substantial new question of patentability on any prior art patents or printed publications, not just those in the request.

The determination under 35 U.S.C. 303(a) whether or not “a substantial new question of patentability” is present can be based upon any prior art patents or printed publications. 35 U.S.C. 303(a) and 37 CFR 1.515(a) provide that the determination on a request will be made “with or without consideration of other patents or printed publications,” i.e., other than those relied upon in the request. The examiner is not limited in making the determination based on the patents and printed publications relied on in the request. The examiner can find “a substantial new question of patentability” based upon the prior art patents or printed publications relied on in the request, a combination of the prior art relied on in the request and other prior art found elsewhere, or based entirely on different patents or printed publications. The primary source of patents and printed publications used in making the determination are those relied on in the request. For reexamination ordered on or after November 2, 2002, see MPEP § 2242, subsection II.A. for a discussion of “old art.” The examiner can also consider any patents and printed publications of record in the patent file from submissions under 37 CFR 1.501 which are in compliance with 37 CFR 1.98 in making the determination. If the examiner believes that additional prior art patents and publications can be readily obtained by searching to supply any deficiencies in the prior art cited in the request, the examiner can perform such an additional search. Such a search should be limited to that area most likely to contain the deficiency of the prior art previously considered and should be made only where there is a reasonable likelihood that prior art can be found to supply any deficiency necessary to “a substantial new question of patentability.”

Jump to MPEP Source · 37 CFR 1.515(a)SNQ CriteriaSubstantial New Question of PatentabilityEx Parte Reexamination
Topic

Reexamination Order

1 rules
StatutoryInformativeAlways
[mpep-2244-ce85a9dae323729bd6f01a8c]
Examiner Can Use Old Art In Reexamination
Note:
The examiner can consider prior art patents and printed publications, including those not relied upon in the request, when determining if a substantial new question of patentability exists for reexamination requests filed on or after November 2, 2002.

The determination under 35 U.S.C. 303(a) whether or not “a substantial new question of patentability” is present can be based upon any prior art patents or printed publications. 35 U.S.C. 303(a) and 37 CFR 1.515(a) provide that the determination on a request will be made “with or without consideration of other patents or printed publications,” i.e., other than those relied upon in the request. The examiner is not limited in making the determination based on the patents and printed publications relied on in the request. The examiner can find “a substantial new question of patentability” based upon the prior art patents or printed publications relied on in the request, a combination of the prior art relied on in the request and other prior art found elsewhere, or based entirely on different patents or printed publications. The primary source of patents and printed publications used in making the determination are those relied on in the request. For reexamination ordered on or after November 2, 2002, see MPEP § 2242, subsection II.A. for a discussion of “old art.” The examiner can also consider any patents and printed publications of record in the patent file from submissions under 37 CFR 1.501 which are in compliance with 37 CFR 1.98 in making the determination. If the examiner believes that additional prior art patents and publications can be readily obtained by searching to supply any deficiencies in the prior art cited in the request, the examiner can perform such an additional search. Such a search should be limited to that area most likely to contain the deficiency of the prior art previously considered and should be made only where there is a reasonable likelihood that prior art can be found to supply any deficiency necessary to “a substantial new question of patentability.”

Jump to MPEP Source · 37 CFR 1.515(a)Reexamination OrderEx Parte ReexaminationEx Parte Reexamination Request
Topic

Ex Parte Reexamination

1 rules
StatutoryRecommendedAlways
[mpep-2244-902b9ba2285720b7a2b61b6c]
Claim Determination Based on Current Claims
Note:
The determination in ex parte reexamination must be based on the claims as they were at the time the decision is made.

The determination should be made on the claims in effect at the time the decision is made (37 CFR 1.515(a)).

Jump to MPEP Source · 37 CFR 1.515(a))Ex Parte ReexaminationRequest Content RequirementsEx Parte Reexamination Request

Citations

Primary topicCitation
Ex Parte Reexamination Request
Reexamination Order
Request Content Requirements
SNQ Criteria
35 U.S.C. § 303(a)
Ex Parte Reexamination Request
Reexamination Order
Request Content Requirements
SNQ Criteria
37 CFR § 1.501
Ex Parte Reexamination
Ex Parte Reexamination Request
Reexamination Order
Request Content Requirements
SNQ Criteria
37 CFR § 1.515(a)
Ex Parte Reexamination Request
Reexamination Order
Request Content Requirements
SNQ Criteria
37 CFR § 1.98
Ex Parte Reexamination Request
Reexamination Order
Request Content Requirements
SNQ Criteria
MPEP § 2242

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