MPEP § 2121.04 — Apparatus and Articles — What Constitutes Enabling Prior Art (Annotated Rules)

§2121.04 Apparatus and Articles — What Constitutes Enabling Prior Art

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

This page consolidates and annotates all enforceable requirements under MPEP § 2121.04, 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.

Apparatus and Articles — What Constitutes Enabling Prior Art

This section addresses Apparatus and Articles — What Constitutes Enabling Prior Art. Contains: 1 requirement.

Key Rules

Topic

Anticipation/Novelty

1 rules
MPEP GuidanceRequiredAlways
[mpep-2121-04-3c413b76e3c21b7ebdc097df]
Pictures Must Show All Claimed Features
Note:
A picture can be used to reject claims if it shows all the structural features and how they are assembled, aligning with anticipation requirements.

Pictures and drawings may be sufficiently enabling to put the public in the possession of the article pictured. Therefore, such an enabling picture may be used to reject claims to the article. However, the picture must show all the claimed structural features and how they are put together. In re Bager, 47 F.2d 951, 953, 8 USPQ 484, 486 (CCPA 1931) (“Description for the purposes of anticipation can be by drawings alone as well as by words.”) (citing Jockmus v. Leviton, 28 F.2d 812 (2d Cir. 1928)). See also MPEP § 2125 for a discussion of drawings as prior art.

Jump to MPEP SourceAnticipation/Novelty

Citations

Primary topicCitation
Anticipation/NoveltyMPEP § 2125
Anticipation/NoveltyIn re Bager, 47 F.2d 951, 953, 8 USPQ 484, 486 (CCPA 1931)

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