MPEP § 2128 — “Printed Publications” as Prior Art (Annotated Rules)

§2128 “Printed Publications” as Prior Art

USPTO MPEP version: BlueIron's Update: 2026-01-10

This page consolidates and annotates all enforceable requirements under MPEP § 2128, 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.

“Printed Publications” as Prior Art

This section addresses “Printed Publications” as Prior Art. Primary authority: 35 U.S.C. 102(b), 35 U.S.C. 102(a), and 35 U.S.C. 102(a)(1). Contains: 5 permissions and 6 other statements.

Key Rules

Topic

Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)

7 rules
StatutoryInformativeAlways
[mpep-2128-5fc81e345d888bd65bea06dd]
No Evidence of Pre-Filing Public Accessibility for Mailer
Note:
The rule requires that there must be evidence showing a printed publication was accessible to the public before the filing date to serve as prior art.

See also Carella v. Starlight Archery, 804 F.2d 135, 231 USPQ 644 (Fed. Cir. 1986) (Starlight Archery argued that Carella’s patent claims to an archery sight were anticipated under pre-AIA 35 U.S.C. 102(a) by an advertisement in a Wisconsin Bow Hunter Association (WBHA) magazine and a WBHA mailer prepared prior to Carella’s filing date. However, there was no evidence as to when the mailer was received by any of the addressees. Plus, the magazine had not been mailed until 10 days after Carella’s filing date. The court held that since there was no proof that either the advertisement or mailer was accessible to any member of the public before the filing date there could be no rejection under pre-AIA 35 U.S.C. 102(a).).

Jump to MPEP SourcePrior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)AIA vs Pre-AIA 102 (MPEP 2151)
StatutoryInformativeAlways
[mpep-2128-3d7187d99bdec03188ecbf8d]
Magazine Not Mailed Before Filing Date Is Prior Art
Note:
A magazine published after the filing date cannot be considered prior art if it was not mailed until at least 10 days after the filing date.

See also Carella v. Starlight Archery, 804 F.2d 135, 231 USPQ 644 (Fed. Cir. 1986) (Starlight Archery argued that Carella’s patent claims to an archery sight were anticipated under pre-AIA 35 U.S.C. 102(a) by an advertisement in a Wisconsin Bow Hunter Association (WBHA) magazine and a WBHA mailer prepared prior to Carella’s filing date. However, there was no evidence as to when the mailer was received by any of the addressees. Plus, the magazine had not been mailed until 10 days after Carella’s filing date. The court held that since there was no proof that either the advertisement or mailer was accessible to any member of the public before the filing date there could be no rejection under pre-AIA 35 U.S.C. 102(a).).

Jump to MPEP SourcePrior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)AIA vs Pre-AIA 102 (MPEP 2151)
StatutoryInformativeAlways
[mpep-2128-4135c4e61ebd939f91406946]
No Rejection for Pre-AIA 102(a) If Not Publicly Accessible
Note:
The court held that advertisements and mailers cannot be used as prior art under pre-AIA 35 U.S.C. 102(a) if there is no proof they were accessible to the public before the filing date.

See also Carella v. Starlight Archery, 804 F.2d 135, 231 USPQ 644 (Fed. Cir. 1986) (Starlight Archery argued that Carella’s patent claims to an archery sight were anticipated under pre-AIA 35 U.S.C. 102(a) by an advertisement in a Wisconsin Bow Hunter Association (WBHA) magazine and a WBHA mailer prepared prior to Carella’s filing date. However, there was no evidence as to when the mailer was received by any of the addressees. Plus, the magazine had not been mailed until 10 days after Carella’s filing date. The court held that since there was no proof that either the advertisement or mailer was accessible to any member of the public before the filing date there could be no rejection under pre-AIA 35 U.S.C. 102(a).).

Jump to MPEP SourcePrior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)AIA vs Pre-AIA 102 (MPEP 2151)
StatutoryInformativeAlways
[mpep-2128-5b6d6bcaf0441bbd43c4d7a2]
Internet Publications Considered Public as Posted
Note:
Electronic publications on the internet are deemed publicly available from their posting date.

Electronic publications on the internet or on an online database are considered to be publicly available as of the date the item was publicly posted. See subsection I above. Absent evidence of the date that the disclosure was publicly posted, if the publication itself does not include a publication date (or retrieval date), it cannot be relied upon as prior art under 35 U.S.C. 102(a)(1) and pre-AIA 35 U.S.C. 102(a) or (b). However, it may be relied upon to provide evidence regarding the state of the art. Examiners may ask the Scientific and Technical Information Center to find the earliest date of publication or posting. See MPEP § 901.06(a), subsection IV.G.

Jump to MPEP SourcePrior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)AIA vs Pre-AIA 102 (MPEP 2151)
StatutoryInformativeAlways
[mpep-2128-b2aa521981628ff095338f3d]
Publication Date Requirement for Prior Art
Note:
The rule states that electronic publications on the internet must have a publicly available date to be considered prior art under AIA 35 U.S.C. 102(a)(1).

Electronic publications on the internet or on an online database are considered to be publicly available as of the date the item was publicly posted. See subsection I above. Absent evidence of the date that the disclosure was publicly posted, if the publication itself does not include a publication date (or retrieval date), it cannot be relied upon as prior art under 35 U.S.C. 102(a)(1) and pre-AIA 35 U.S.C. 102(a) or (b). However, it may be relied upon to provide evidence regarding the state of the art. Examiners may ask the Scientific and Technical Information Center to find the earliest date of publication or posting. See MPEP § 901.06(a), subsection IV.G.

Jump to MPEP SourcePrior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)AIA vs Pre-AIA 102 (MPEP 2151)
StatutoryProhibitedAlways
[mpep-2128-e18214800a74cf42fff30c99]
Prior Art Publication Without Date Is Not Admissible
Note:
A publication cannot be used as prior art if it lacks a clear date of posting and does not include a retrieval date.

Electronic publications on the internet or on an online database are considered to be publicly available as of the date the item was publicly posted. See subsection I above. Absent evidence of the date that the disclosure was publicly posted, if the publication itself does not include a publication date (or retrieval date), it cannot be relied upon as prior art under 35 U.S.C. 102(a)(1) and pre-AIA 35 U.S.C. 102(a) or (b). However, it may be relied upon to provide evidence regarding the state of the art. Examiners may ask the Scientific and Technical Information Center to find the earliest date of publication or posting. See MPEP § 901.06(a), subsection IV.G.

Jump to MPEP SourcePrior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)AIA vs Pre-AIA 102 (MPEP 2151)
StatutoryPermittedAlways
[mpep-2128-d9b1a0f2cdb8bf7f6ac6c8c5]
Examiners Can Request Earliest Publication Dates
Note:
Examiners can ask the Scientific and Technical Information Center to find the earliest date a publication was posted or published.

Electronic publications on the internet or on an online database are considered to be publicly available as of the date the item was publicly posted. See subsection I above. Absent evidence of the date that the disclosure was publicly posted, if the publication itself does not include a publication date (or retrieval date), it cannot be relied upon as prior art under 35 U.S.C. 102(a)(1) and pre-AIA 35 U.S.C. 102(a) or (b). However, it may be relied upon to provide evidence regarding the state of the art. Examiners may ask the Scientific and Technical Information Center to find the earliest date of publication or posting. See MPEP § 901.06(a), subsection IV.G.

Jump to MPEP SourcePrior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)Prior Art Under Pre-AIA 35 U.S.C. 102 (MPEP 2131-2138)AIA vs Pre-AIA 102 (MPEP 2151)
Topic

Printed Publication as Prior Art (MPEP 2128)

3 rules
StatutoryPermittedAlways
[mpep-2128-59a3240fd5be98ad1a119104]
Electronic Publication as Prior Art
Note:
An electronic publication can be relied upon for all that it would reasonably suggest to one skilled in the art, but only its text may support a rejection under 35 U.S.C. 102 or 103 if it is an abstract.

An electronic publication, like any publication, may be relied upon for all that it would have reasonably suggested to one having ordinary skill in the art. See MPEP § 2121.01 and § 2123. Note, however, that if an electronic document which is the abstract of a patent or printed publication is relied upon in a rejection under 35 U.S.C. 102 or 35 U.S.C. 103, only the text of the abstract (and not the underlying document) may be relied upon to support the rejection. In situations where the electronic version and the published paper version of the same or a corresponding patent or printed publication differ appreciably, each may need to be cited and relied upon as independent references based on what they disclose.

Jump to MPEP SourcePrinted Publication as Prior Art (MPEP 2128)Novelty / Prior ArtObviousness
StatutoryPermittedAlways
[mpep-2128-1dbaaff3bcbfa18f40ea301e]
Abstract of Patent or Publication Text Only for Rejection
Note:
When an electronic document abstract is relied upon in a rejection under 35 U.S.C. 102 or 103, only the text of the abstract can be used to support the rejection, not the underlying document.

An electronic publication, like any publication, may be relied upon for all that it would have reasonably suggested to one having ordinary skill in the art. See MPEP § 2121.01 and § 2123. Note, however, that if an electronic document which is the abstract of a patent or printed publication is relied upon in a rejection under 35 U.S.C. 102 or 35 U.S.C. 103, only the text of the abstract (and not the underlying document) may be relied upon to support the rejection. In situations where the electronic version and the published paper version of the same or a corresponding patent or printed publication differ appreciably, each may need to be cited and relied upon as independent references based on what they disclose.

Jump to MPEP SourcePrinted Publication as Prior Art (MPEP 2128)Novelty / Prior ArtObviousness
StatutoryPermittedAlways
[mpep-2128-f37d479c0f7ecc1ab686f189]
Electronic and Paper Versions Differently Cited
Note:
When electronic and paper versions of a patent or printed publication differ, both must be cited independently based on their disclosures.

An electronic publication, like any publication, may be relied upon for all that it would have reasonably suggested to one having ordinary skill in the art. See MPEP § 2121.01 and § 2123. Note, however, that if an electronic document which is the abstract of a patent or printed publication is relied upon in a rejection under 35 U.S.C. 102 or 35 U.S.C. 103, only the text of the abstract (and not the underlying document) may be relied upon to support the rejection. In situations where the electronic version and the published paper version of the same or a corresponding patent or printed publication differ appreciably, each may need to be cited and relied upon as independent references based on what they disclose.

Jump to MPEP SourcePrinted Publication as Prior Art (MPEP 2128)Novelty / Prior ArtObviousness
Topic

Statutory Authority for Examination

1 rules
StatutoryPermittedAlways
[mpep-2128-ce19d9435ae50d00751b406e]
Applicant Can Challenge Document's Public Availability
Note:
An applicant or patent owner can dispute a document’s public availability and date of accessibility even if the document itself includes a publication date by submitting an affidavit under 37 CFR 1.132 with supporting evidence.

When a document is cited in a rejection of a claim in an examination of a patent application or during an reexamination proceeding, an applicant or patent owner may challenge its public availability and/or the date it became publicly accessible, even when the document itself contains a publication date, by filing a proper affidavit or declaration under 37 CFR 1.132 that includes facts and evidence to support the applicant or patent owner's position. See MPEP § 716 et seq.

Jump to MPEP Source · 37 CFR 1.132Statutory Authority for ExaminationRejection of ClaimsExamination Procedures
Topic

AIA vs Pre-AIA 102 (MPEP 2151)

1 rules
StatutoryInformativeAlways
[mpep-2128-6fcfd738c99a688fb4d60707]
Electronic Publication as Printed Prior Art
Note:
An online database, Internet publication, discussion group, forum, digital video, or social media post is considered a printed publication if accessible to those in the relevant art.

An electronic publication, including an online database or Internet publication (e.g., discussion group, forum, digital video, or social media post), is considered to be a “printed publication” within the meaning of 35 U.S.C. 102(a)(1) and pre-AIA 35 U.S.C. 102(a) and (b) provided the publication was accessible to persons concerned with the art to which the document relates. See In re Wyer, 655 F.2d 221, 227, 210 USPQ 790, 795 (CCPA 1981) (“Accordingly, whether information is printed, handwritten, or on microfilm or a magnetic disc or tape, etc., the one who wishes to characterize the information, in whatever form it may be, as a ‘printed publication’… should produce sufficient proof of its dissemination or that it has otherwise been available and accessible to persons concerned with the art to which the document relates and thus most likely to avail themselves of its contents.’” (citations omitted).). See also Amazon.com v. Barnesandnoble.com, 73 F. Supp. 2d 1228, 53 USPQ2d 1115, 1119 (W.D. Wash. 1999) (Pages from a website were relied on by defendants as an anticipatory reference (to no avail), however status of the reference as prior art was not challenged.); In re Epstein, 32 F.3d 1559, 31 USPQ2d 1817 (Fed. Cir. 1994) (Database printouts of abstracts which were not themselves prior art publications were properly relied as providing evidence that the software products referenced therein were “first installed” or “released” more than one year prior to applicant’s filing date.); Suffolk Tech v. AOL and Google, 752 F.3d 1358, 110 USPQ2d 2034 (Fed. Cir. 2014) (A newsgroup posting constituted prior art as it was directed to those having ordinary skill in the art and was publicly accessible because the post was sufficiently disseminated.)

Jump to MPEP SourceAIA vs Pre-AIA 102 (MPEP 2151)Printed Publication as Prior Art (MPEP 2128)AIA vs Pre-AIA Practice
Topic

Pre-AIA 102(b) – Statutory Bar (MPEP 2133)

1 rules
StatutoryRecommendedAlways
[mpep-2128-2537a6b004083e4c529a151c]
Requirement for Printed Publications as Prior Art
Note:
The rule requires that a printed publication must be accessible to those skilled in the relevant art and sufficiently disseminated to qualify as prior art.

An electronic publication, including an online database or Internet publication (e.g., discussion group, forum, digital video, or social media post), is considered to be a “printed publication” within the meaning of 35 U.S.C. 102(a)(1) and pre-AIA 35 U.S.C. 102(a) and (b) provided the publication was accessible to persons concerned with the art to which the document relates. See In re Wyer, 655 F.2d 221, 227, 210 USPQ 790, 795 (CCPA 1981) (“Accordingly, whether information is printed, handwritten, or on microfilm or a magnetic disc or tape, etc., the one who wishes to characterize the information, in whatever form it may be, as a ‘printed publication’… should produce sufficient proof of its dissemination or that it has otherwise been available and accessible to persons concerned with the art to which the document relates and thus most likely to avail themselves of its contents.’” (citations omitted).). See also Amazon.com v. Barnesandnoble.com, 73 F. Supp. 2d 1228, 53 USPQ2d 1115, 1119 (W.D. Wash. 1999) (Pages from a website were relied on by defendants as an anticipatory reference (to no avail), however status of the reference as prior art was not challenged.); In re Epstein, 32 F.3d 1559, 31 USPQ2d 1817 (Fed. Cir. 1994) (Database printouts of abstracts which were not themselves prior art publications were properly relied as providing evidence that the software products referenced therein were “first installed” or “released” more than one year prior to applicant’s filing date.); Suffolk Tech v. AOL and Google, 752 F.3d 1358, 110 USPQ2d 2034 (Fed. Cir. 2014) (A newsgroup posting constituted prior art as it was directed to those having ordinary skill in the art and was publicly accessible because the post was sufficiently disseminated.)
See In re Wyer, 655 F.2d 221, 227, 210 USPQ 790, 795 (CCPA 1981) (“Accordingly, whether information is printed, handwritten, or on microfilm or a magnetic disc or tape, etc., the one who wishes to characterize the information, in whatever form it may be, as a ‘printed publication’… should produce sufficient proof of its dissemination or that it has otherwise been available and accessible to persons concerned with the art to which the document relates and thus most likely to avail themselves of its contents.’” (citations omitted).). See also Amazon.com v. Barnesandnoble.com, 73 F. Supp. 2d 1228, 53 USPQ2d 1115, 1119 (W.D. Wash. 1999) (Pages from a website were relied on by defendants as an anticipatory reference (to no avail), however status of the reference as prior art was not challenged.) In re Epstein, 32 F.3d 1559, 31 USPQ2d 1817 (Fed. Cir. 1994) (Database printouts of abstracts which were not themselves prior art publications were properly relied as providing evidence that the software products referenced therein were “first installed” or “released” more than one year prior to applicant’s filing date.)

Jump to MPEP SourcePre-AIA 102(b) – Statutory Bar (MPEP 2133)Assignee as Applicant SignatureApplicant and Assignee Filing Under AIA
Topic

Dissemination to Public

1 rules
StatutoryInformativeAlways
[mpep-2128-0464752dc73359cd9786bca1]
Newsgroup Posting Constitutes Prior Art
Note:
A newsgroup posting directed to those with ordinary skill in the art and publicly accessible constitutes prior art.

An electronic publication, including an online database or Internet publication (e.g., discussion group, forum, digital video, or social media post), is considered to be a “printed publication” within the meaning of 35 U.S.C. 102(a)(1) and pre-AIA 35 U.S.C. 102(a) and (b) provided the publication was accessible to persons concerned with the art to which the document relates. See In re Wyer, 655 F.2d 221, 227, 210 USPQ 790, 795 (CCPA 1981) (“Accordingly, whether information is printed, handwritten, or on microfilm or a magnetic disc or tape, etc., the one who wishes to characterize the information, in whatever form it may be, as a ‘printed publication’… should produce sufficient proof of its dissemination or that it has otherwise been available and accessible to persons concerned with the art to which the document relates and thus most likely to avail themselves of its contents.’” (citations omitted).). See also Amazon.com v. Barnesandnoble.com, 73 F. Supp. 2d 1228, 53 USPQ2d 1115, 1119 (W.D. Wash. 1999) (Pages from a website were relied on by defendants as an anticipatory reference (to no avail), however status of the reference as prior art was not challenged.); In re Epstein, 32 F.3d 1559, 31 USPQ2d 1817 (Fed. Cir. 1994) (Database printouts of abstracts which were not themselves prior art publications were properly relied as providing evidence that the software products referenced therein were “first installed” or “released” more than one year prior to applicant’s filing date.); Suffolk Tech v. AOL and Google, 752 F.3d 1358, 110 USPQ2d 2034 (Fed. Cir. 2014) (A newsgroup posting constituted prior art as it was directed to those having ordinary skill in the art and was publicly accessible because the post was sufficiently disseminated.)

Jump to MPEP SourceDissemination to PublicPublic Accessibility RequirementPrinted Publication as Prior Art (MPEP 2128)
Topic

First Inventor to File (FITF) System

1 rules
MPEP GuidanceInformativeAlways
[mpep-2128-9c7247d5f8f5f756c070f58e]
First Inventor to File FITF Provision
Note:
This rule applies to applications subject to the first inventor to file provisions of the AIA, as detailed in MPEP sections 2152.02(b) and 2152.02(e).

[Editor Note: For applications subject to the first inventor to file (FITF) provisions of the AIA, see also MPEP §§ 2152.02(b) and 2152.02(e)]

MPEP § 2128First Inventor to File (FITF) SystemAIA vs Pre-AIA Practice

Citations

Primary topicCitation
Printed Publication as Prior Art (MPEP 2128)35 U.S.C. § 102
AIA vs Pre-AIA 102 (MPEP 2151)
Dissemination to Public
Pre-AIA 102(b) – Statutory Bar (MPEP 2133)
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)
35 U.S.C. § 102(a)
AIA vs Pre-AIA 102 (MPEP 2151)
Dissemination to Public
Pre-AIA 102(b) – Statutory Bar (MPEP 2133)
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)
35 U.S.C. § 102(a)(1)
35 U.S.C. § 102(b)
Printed Publication as Prior Art (MPEP 2128)35 U.S.C. § 103
Printed Publication as Prior Art (MPEP 2128)35 U.S.C. § 2123
Statutory Authority for Examination37 CFR § 1.132
Printed Publication as Prior Art (MPEP 2128)MPEP § 2121.01
First Inventor to File (FITF) SystemMPEP § 2152.02(b)
MPEP § 707.05(e)
Statutory Authority for ExaminationMPEP § 716
MPEP § 719.05
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)MPEP § 901.06(a)
MPEP § 904.02(c)
Bruckelmyer v. Ground Heaters, Inc., 445 F.3d 1374, 1378 (Fed. Cir. 2006)
AIA vs Pre-AIA 102 (MPEP 2151)
Dissemination to Public
Pre-AIA 102(b) – Statutory Bar (MPEP 2133)
In re Epstein, 32 F.3d 1559, 31 USPQ2d 1817 (Fed. Cir. 1994)
In re Hall, 781 F.2d 897, 228 USPQ 453 (Fed. Cir. 1986)
In re Klopfenstein, 380 F.3d 1345, 1350 (Fed. Cir. 2004)
AIA vs Pre-AIA 102 (MPEP 2151)
Dissemination to Public
Pre-AIA 102(b) – Statutory Bar (MPEP 2133)
In re Wyer, 655 F.2d 221, 210 USPQ 790 (CCPA 1981)
LLC v. AOL Inc., 752 F.3d 1358, 1364 (Fed. Cir. 2014)
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)See also Carella v. Starlight Archery, 804 F.2d 135, 231 USPQ 644 (Fed. Cir. 1986)
AIA vs Pre-AIA 102 (MPEP 2151)
Dissemination to Public
Pre-AIA 102(b) – Statutory Bar (MPEP 2133)
Suffolk Tech v. AOL and Google, 752 F.3d 1358, 110 USPQ2d 2034 (Fed. Cir. 2014)
see Blue Calypso, LLC v. Groupon, Inc., 815 F.3d 1331, 1348 (Fed. Cir. 2016)

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: 2026-01-10