MPEP § 2133.03(e)(5) — Experimentation and Degree of Supervision and Control (Annotated Rules)

§2133.03(e)(5) Experimentation and Degree of Supervision and Control

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

This page consolidates and annotates all enforceable requirements under MPEP § 2133.03(e)(5), 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.

Experimentation and Degree of Supervision and Control

This section addresses Experimentation and Degree of Supervision and Control. Primary authority: 35 U.S.C. 100, 35 U.S.C. 102, and 35 U.S.C. 102(b). Contains: 1 requirement, 1 permission, and 2 other statements.

Key Rules

Topic

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

3 rules
StatutoryInformativeAlways
[mpep-2133-03-e-5-68fb578c5edff3f8ab9333be]
Control and Customer Awareness Determine Experimental Use
Note:
The extent of an inventor's supervision and control over an invention during experimentation, along with the customer’s awareness, determine if subsequent use is a pre-AIA 102(b) bar.

The significant determinative factors in questions of experimental purpose are the extent of supervision and control maintained by an inventor over an invention during an alleged period of experimentation, and the customer’s awareness of the experimentation. Electromotive Div. of Gen. Motors Corp. v. Transportation Sys. Div. of Gen. Elec. Co., 417 F.3d 1203, 1214, 75 USPQ2d 1650, 1658 (Fed. Cir. 2005)(“control and customer awareness ordinarily must be proven if experimentation is to be found”). Once a period of experimental activity has ended and supervision and control has been relinquished by an inventor without any restraints on subsequent use of an invention, an unrestricted subsequent use of the invention is a pre-AIA 35 U.S.C. 102(b) bar. In re Blaisdell, 242 F.2d 779, 784, 113 USPQ 289, 293 (CCPA 1957).

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)
StatutoryRequiredAlways
[mpep-2133-03-e-5-03785d9f48aa659f0696c70a]
Experimentation Requires Control and Customer Awareness
Note:
The rule states that control over an invention and customer awareness must be proven during a period of experimentation for it to be considered valid.

The significant determinative factors in questions of experimental purpose are the extent of supervision and control maintained by an inventor over an invention during an alleged period of experimentation, and the customer’s awareness of the experimentation. Electromotive Div. of Gen. Motors Corp. v. Transportation Sys. Div. of Gen. Elec. Co., 417 F.3d 1203, 1214, 75 USPQ2d 1650, 1658 (Fed. Cir. 2005)(“control and customer awareness ordinarily must be proven if experimentation is to be found”). Once a period of experimental activity has ended and supervision and control has been relinquished by an inventor without any restraints on subsequent use of an invention, an unrestricted subsequent use of the invention is a pre-AIA 35 U.S.C. 102(b) bar. In re Blaisdell, 242 F.2d 779, 784, 113 USPQ 289, 293 (CCPA 1957).

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-2133-03-e-5-20436f8cc16e853facd7a661]
Unrestricted Subsequent Use Bars Prior Art
Note:
Once an inventor relinquishes supervision and control over an invention without restrictions, any unrestricted use bars prior art under pre-AIA 35 U.S.C. 102(b).

The significant determinative factors in questions of experimental purpose are the extent of supervision and control maintained by an inventor over an invention during an alleged period of experimentation, and the customer’s awareness of the experimentation. Electromotive Div. of Gen. Motors Corp. v. Transportation Sys. Div. of Gen. Elec. Co., 417 F.3d 1203, 1214, 75 USPQ2d 1650, 1658 (Fed. Cir. 2005)(“control and customer awareness ordinarily must be proven if experimentation is to be found”). Once a period of experimental activity has ended and supervision and control has been relinquished by an inventor without any restraints on subsequent use of an invention, an unrestricted subsequent use of the invention is a pre-AIA 35 U.S.C. 102(b) bar. In re Blaisdell, 242 F.2d 779, 784, 113 USPQ 289, 293 (CCPA 1957).

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

On Sale Under AIA (MPEP 2152.02(d))

1 rules
StatutoryPermittedAlways
[mpep-2133-03-e-5-073fc140b6e48d9a08dcde6b]
Public Use and On Sale Provisions Under AIA 102a1
Note:
This rule outlines the requirements for public use and on sale provisions under the AIA's 35 U.S.C. 102, applicable to applications subject to examination under FITF 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
On Sale Under AIA (MPEP 2152.02(d))35 U.S.C. § 102
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)35 U.S.C. § 102(b)
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
Prior Art Under AIA 35 U.S.C. 102 (MPEP 2150-2159)In re Blaisdell, 242 F.2d 779, 784, 113 USPQ 289, 293 (CCPA 1957)

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