MPEP § 2126.01 — Date of Availability of a Patent as a Reference (Annotated Rules)

§2126.01 Date of Availability of a Patent as a Reference

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

This page consolidates and annotates all enforceable requirements under MPEP § 2126.01, 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.

Date of Availability of a Patent as a Reference

This section addresses Date of Availability of a Patent as a Reference. Primary authority: 35 U.S.C. 102, 35 U.S.C. 3.06, and 37 CFR 3.06. Contains: 2 statements.

Key Rules

Topic

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

1 rules
StatutoryInformativeAlways
[mpep-2126-01-03bc124beda475144cac5efc]
Summary of Foreign Patent Dates for Pre-AIA 35 U.S.C. 102
Note:
MPEP § 901.05 provides a tabular summary of dates of patenting for many foreign patents, useful for determining the date of availability as prior art under pre-AIA 35 U.S.C. 102.

Note that MPEP § 901.05 summarizes in tabular form dates of patenting for many foreign patents. For a list of cases that discuss the date of patenting countries for purposes of pre-AIA 35 U.S.C. 102 in particular, see Chisum, Patents § 3.06[4] n.2.

Jump to MPEP Source · 37 CFR 3.06Prior 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)

Citations

Primary topicCitation
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)35 U.S.C. § 102
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)37 CFR § 3.06
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)MPEP § 901.05
In re Ekenstam, 256 F.2d 321, 118 USPQ 349 (CCPA 1958)
In re Monks, 588 F.2d 308, 200 USPQ 129 (CCPA 1978)

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