MPEP § 2133.03(e)(6) — Permitted Experimental Activity and Testing (Annotated Rules)

§2133.03(e)(6) Permitted Experimental Activity and Testing

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

This page consolidates and annotates all enforceable requirements under MPEP § 2133.03(e)(6), 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.

Permitted Experimental Activity and Testing

This section addresses Permitted Experimental Activity and Testing. Primary authority: 35 U.S.C. 100, 35 U.S.C. 102, and 35 U.S.C. 101. Contains: 5 permissions and 2 other statements.

Key Rules

Topic

Working and Prophetic Examples (MPEP 2164.02)

4 rules
StatutoryPermittedAlways
[mpep-2133-03-e-6-c62c0002b2a72bf23e8e9622]
Testing of Invention in Normal Context Is Permitted
Note:
Permits experimentation to determine utility and test an invention's technological development without commercial exploitation.

Testing of an invention in the normal context of its technological development is generally within the realm of permitted experimental activity. Likewise, experimentation to determine utility, as that term is applied in 35 U.S.C. 101, may also constitute permissible activity. See General Motors Corp. v. Bendix Aviation Corp., 123 F. Supp. 506, 521, 102 USPQ 58, 69 (N.D.Ind. 1954). For example, where an invention relates to a chemical composition with no known utility, i.e., a patent application for the composition could not be filed (35 U.S.C. 101; 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph), continued testing to find utility would likely be permissible, absent a sale of the composition or other evidence of commercial exploitation.

Jump to MPEP SourceWorking and Prophetic Examples (MPEP 2164.02)35 U.S.C. 112(a) – Written Description & EnablementDisclosure Requirements
StatutoryPermittedAlways
[mpep-2133-03-e-6-828154a459e82fd86f8d3300]
Permissible Testing to Determine Utility
Note:
Testing an invention to determine its utility is considered a permissible experimental activity under 35 U.S.C. 101.

Testing of an invention in the normal context of its technological development is generally within the realm of permitted experimental activity. Likewise, experimentation to determine utility, as that term is applied in 35 U.S.C. 101, may also constitute permissible activity. See General Motors Corp. v. Bendix Aviation Corp., 123 F. Supp. 506, 521, 102 USPQ 58, 69 (N.D.Ind. 1954). For example, where an invention relates to a chemical composition with no known utility, i.e., a patent application for the composition could not be filed (35 U.S.C. 101; 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph), continued testing to find utility would likely be permissible, absent a sale of the composition or other evidence of commercial exploitation.

Jump to MPEP SourceWorking and Prophetic Examples (MPEP 2164.02)35 U.S.C. 112(a) – Written Description & EnablementDisclosure Requirements
StatutoryInformativeAlways
[mpep-2133-03-e-6-25197c950680959d80b7fcfb]
Permitted Testing for Utility Determination
Note:
Invention testing in its normal development context and continued utility determination tests are permissible experimental activities.

Testing of an invention in the normal context of its technological development is generally within the realm of permitted experimental activity. Likewise, experimentation to determine utility, as that term is applied in 35 U.S.C. 101, may also constitute permissible activity. See General Motors Corp. v. Bendix Aviation Corp., 123 F. Supp. 506, 521, 102 USPQ 58, 69 (N.D.Ind. 1954). For example, where an invention relates to a chemical composition with no known utility, i.e., a patent application for the composition could not be filed (35 U.S.C. 101; 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph), continued testing to find utility would likely be permissible, absent a sale of the composition or other evidence of commercial exploitation.

Jump to MPEP SourceWorking and Prophetic Examples (MPEP 2164.02)35 U.S.C. 112(a) – Written Description & EnablementDisclosure Requirements
StatutoryInformativeAlways
[mpep-2133-03-e-6-be60d893fbabf933d1e216de]
Testing to Determine Utility Permissible
Note:
Inventors may continue testing a chemical composition without known utility to find its use, provided there is no commercial exploitation.

Testing of an invention in the normal context of its technological development is generally within the realm of permitted experimental activity. Likewise, experimentation to determine utility, as that term is applied in 35 U.S.C. 101, may also constitute permissible activity. See General Motors Corp. v. Bendix Aviation Corp., 123 F. Supp. 506, 521, 102 USPQ 58, 69 (N.D.Ind. 1954). For example, where an invention relates to a chemical composition with no known utility, i.e., a patent application for the composition could not be filed (35 U.S.C. 101; 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph), continued testing to find utility would likely be permissible, absent a sale of the composition or other evidence of commercial exploitation.

Jump to MPEP SourceWorking and Prophetic Examples (MPEP 2164.02)35 U.S.C. 112(a) – Written Description & EnablementDisclosure Requirements
Topic

Ornamental vs. Functional Features

2 rules
StatutoryPermittedAlways
[mpep-2133-03-e-6-f1d29b0871826b5a24111c13]
Public Use of Ornamental Design Not Experimental
Note:
The public display of an ornamental design intended to generate consumer interest is not considered experimental use, but testing related to functional features may negate this.

The public use of an ornamental design which is directed toward generating consumer interest in the aesthetics of the design is not an experimental use. In re Mann, 861 F.2d 1581, 8 USPQ2d 2030 (Fed. Cir. 1988) (display of a wrought iron table at a trade show held to be public use). However, “experimentation directed to functional features of a product also containing an ornamental design may negate what otherwise would be considered a public use.” Tone Brothers, Inc. v. Sysco Corp., 28 F.3d 1192, 1196, 31 USPQ2d 1321, 1326 (Fed. Cir. 1994) (A study wherein students evaluated the effect of the functional features of a spice container design may be considered an experimental use.).

Jump to MPEP SourceOrnamental vs. Functional FeaturesComputer-Generated Icons and GUIOrnamentality Requirement
StatutoryPermittedAlways
[mpep-2133-03-e-6-1e75371aacbff5b1de6cda18]
Study of Functional Features Is Experimental Use
Note:
A study evaluating the functional features of a design is considered an experimental use, even if it involves ornamental aspects.

The public use of an ornamental design which is directed toward generating consumer interest in the aesthetics of the design is not an experimental use. In re Mann, 861 F.2d 1581, 8 USPQ2d 2030 (Fed. Cir. 1988) (display of a wrought iron table at a trade show held to be public use). However, “experimentation directed to functional features of a product also containing an ornamental design may negate what otherwise would be considered a public use.” Tone Brothers, Inc. v. Sysco Corp., 28 F.3d 1192, 1196, 31 USPQ2d 1321, 1326 (Fed. Cir. 1994) (A study wherein students evaluated the effect of the functional features of a spice container design may be considered an experimental use.).

Jump to MPEP SourceOrnamental vs. Functional FeaturesComputer-Generated Icons and GUIOrnamentality Requirement
Topic

On Sale Under AIA (MPEP 2152.02(d))

1 rules
StatutoryPermittedAlways
[mpep-2133-03-e-6-fa295288c82008ba5dee7b02]
Requirement for Determining Public Use and On Sale Under AIA 102a1
Note:
This rule outlines the requirements to determine if an invention has been publicly used or on sale, which affects its patentability under the AIA's 35 U.S.C. 102 provisions.

[Editor Note: This MPEP section may be applicable to applications subject to examination under the first inventor to file (FITF) provisions of the AIA as set forth in 35 U.S.C. 100 (note). See MPEP § 2159 et seq. to determine whether an application is subject to examination under the FITF provisions, and MPEP § 2150 et seq. for examination of applications subject to those provisions. See MPEP § 2152.02(c) through (e) for a detailed discussion of the public use and on sale provisions of AIA 35 U.S.C. 102.]

Jump to MPEP SourceOn Sale Under AIA (MPEP 2152.02(d))Public Use Under AIA (MPEP 2152.02(c))AIA 102(a)(1) – Prior Art Categories (MPEP 2152.02)

Citations

Primary topicCitation
On Sale Under AIA (MPEP 2152.02(d))35 U.S.C. § 100
Working and Prophetic Examples (MPEP 2164.02)35 U.S.C. § 101
On Sale Under AIA (MPEP 2152.02(d))35 U.S.C. § 102
Working and Prophetic Examples (MPEP 2164.02)35 U.S.C. § 112
Working and Prophetic Examples (MPEP 2164.02)35 U.S.C. § 112(a)
On Sale Under AIA (MPEP 2152.02(d))MPEP § 2150
On Sale Under AIA (MPEP 2152.02(d))MPEP § 2152.02(c)
On Sale Under AIA (MPEP 2152.02(d))MPEP § 2159
Ornamental vs. Functional FeaturesIn re Mann, 861 F.2d 1581, 8 USPQ2d 2030 (Fed. Cir. 1988)
Working and Prophetic Examples (MPEP 2164.02)See General Motors Corp. v. Bendix Aviation Corp., 123 F. Supp. 506, 521, 102 USPQ 58, 69 (N.D.Ind. 1954)
Ornamental vs. Functional FeaturesTone Brothers, Inc. v. Sysco Corp., 28 F.3d 1192, 1196, 31 USPQ2d 1321, 1326 (Fed. Cir. 1994)

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