MPEP § 2164.03 — Relationship of Predictability of the Art and the Enablement Requirement (Annotated Rules)

§2164.03 Relationship of Predictability of the Art and the Enablement Requirement

USPTO MPEP version: BlueIron's Update: 2025-12-31

This page consolidates and annotates all enforceable requirements under MPEP § 2164.03, 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.

Relationship of Predictability of the Art and the Enablement Requirement

This section addresses Relationship of Predictability of the Art and the Enablement Requirement. Contains: 1 requirement, 1 prohibition, 1 permission, and 7 other statements.

Key Rules

Topic

Anticipation/Novelty

5 rules
MPEP GuidanceInformativeAlways
[mpep-2164-03-4f1b8b124238388ed355e3a6]
Predictability of Art Must Be Considered for Enablement
Note:
The ability of one skilled in the art to predict the effect of changes within the claimed invention must be considered when assessing enablement.

The “predictability or lack thereof” in the art refers to the ability of one skilled in the art to extrapolate the disclosed or known results to the claimed invention. If one skilled in the art can readily anticipate the effect of a change within the subject matter to which the claimed invention pertains, then there is predictability in the art. On the other hand, if one skilled in the art cannot readily anticipate the effect of a change within the subject matter to which that claimed invention pertains, then there is lack of predictability in the art. Accordingly, what is known in the art provides evidence as to the question of predictability. In particular, the court in In re Marzocchi, 439 F.2d 220, 223-24, 169 USPQ 367, 369-70 (CCPA 1971), stated:

Jump to MPEP SourceAnticipation/Novelty
MPEP GuidancePermittedAlways
[mpep-2164-03-45e719b2ea6b3d901ca65587]
Predictability of Art for Anticipation
Note:
If a skilled artisan can readily anticipate the effect of changes within the claimed invention's subject matter, then there is predictability in the art.

The “predictability or lack thereof” in the art refers to the ability of one skilled in the art to extrapolate the disclosed or known results to the claimed invention. If one skilled in the art can readily anticipate the effect of a change within the subject matter to which the claimed invention pertains, then there is predictability in the art. On the other hand, if one skilled in the art cannot readily anticipate the effect of a change within the subject matter to which that claimed invention pertains, then there is lack of predictability in the art. Accordingly, what is known in the art provides evidence as to the question of predictability. In particular, the court in In re Marzocchi, 439 F.2d 220, 223-24, 169 USPQ 367, 369-70 (CCPA 1971), stated:

Jump to MPEP SourceAnticipation/Novelty
MPEP GuidanceProhibitedAlways
[mpep-2164-03-ba061d2b1a8c73d1e46a51be]
Predictability Requirement for Invention Changes
Note:
If a skilled artisan cannot readily anticipate the effect of changes within an invention's subject matter, predictability in the art is lacking.

The “predictability or lack thereof” in the art refers to the ability of one skilled in the art to extrapolate the disclosed or known results to the claimed invention. If one skilled in the art can readily anticipate the effect of a change within the subject matter to which the claimed invention pertains, then there is predictability in the art. On the other hand, if one skilled in the art cannot readily anticipate the effect of a change within the subject matter to which that claimed invention pertains, then there is lack of predictability in the art. Accordingly, what is known in the art provides evidence as to the question of predictability. In particular, the court in In re Marzocchi, 439 F.2d 220, 223-24, 169 USPQ 367, 369-70 (CCPA 1971), stated:

Jump to MPEP SourceAnticipation/Novelty
MPEP GuidanceInformativeAlways
[mpep-2164-03-b5ffbc7b7fd0091a7cc9929a]
Evidence for Art Predictability Required
Note:
The court uses known art to determine if one skilled in the art can predict the effects of changes related to the claimed invention.

The “predictability or lack thereof” in the art refers to the ability of one skilled in the art to extrapolate the disclosed or known results to the claimed invention. If one skilled in the art can readily anticipate the effect of a change within the subject matter to which the claimed invention pertains, then there is predictability in the art. On the other hand, if one skilled in the art cannot readily anticipate the effect of a change within the subject matter to which that claimed invention pertains, then there is lack of predictability in the art. Accordingly, what is known in the art provides evidence as to the question of predictability. In particular, the court in In re Marzocchi, 439 F.2d 220, 223-24, 169 USPQ 367, 369-70 (CCPA 1971), stated:

Jump to MPEP SourceAnticipation/Novelty
MPEP GuidanceInformativeAlways
[mpep-2164-03-7bdf4cad4749a6f2e839e649]
Art Predictability Evidence for Anticipation
Note:
The court in Marzocchi states that evidence of predictability in the art is used to determine if a claimed invention can be anticipated.

The “predictability or lack thereof” in the art refers to the ability of one skilled in the art to extrapolate the disclosed or known results to the claimed invention. If one skilled in the art can readily anticipate the effect of a change within the subject matter to which the claimed invention pertains, then there is predictability in the art. On the other hand, if one skilled in the art cannot readily anticipate the effect of a change within the subject matter to which that claimed invention pertains, then there is lack of predictability in the art. Accordingly, what is known in the art provides evidence as to the question of predictability. In particular, the court in In re Marzocchi, 439 F.2d 220, 223-24, 169 USPQ 367, 369-70 (CCPA 1971), stated:

Jump to MPEP SourceAnticipation/Novelty
Topic

Undue Experimentation

2 rules
MPEP GuidanceInformativeAlways
[mpep-2164-03-014b2fe13a7ff077465f3f82]
Amount of Guidance Needed for Invention Is Inversely Related to Art Predictability and State of the Art
Note:
The specification must provide sufficient guidance based on the knowledge in the state of the art and predictability of the field, requiring more detail if less is known or the art is unpredictable.

The amount of guidance or direction needed to enable the invention is inversely related to the amount of knowledge in the state of the art as well as the predictability in the art. In re Fisher, 427 F.2d 833, 839, 166 USPQ 18, 24 (CCPA 1970). The “amount of guidance or direction” refers to that information in the application, as originally filed, that teaches exactly how to make or use the invention. The more that is known in the prior art about the nature of the invention, how to make, and how to use the invention, and the more predictable the art is, the less information needs to be explicitly stated in the specification. In contrast, if little is known in the prior art about the nature of the invention and the art is unpredictable, the specification would need more detail as to how to make and use the invention in order to be enabling. See, e.g., Chiron Corp. v. Genentech Inc., 363 F.3d 1247, 1254, 70 USPQ2d 1321, 1326 (Fed. Cir. 2004) (“Nascent technology, however, must be enabled with a ‘specific and useful teaching.’ The law requires an enabling disclosure for nascent technology because a person of ordinary skill in the art has little or no knowledge independent from the patentee’s instruction. Thus, the public’s end of the bargain struck by the patent system is a full enabling disclosure of the claimed technology.” (citations omitted)).

Jump to MPEP SourceUndue ExperimentationEnablement Support for ClaimsScope Commensurate with Disclosure
MPEP GuidanceInformativeAlways
[mpep-2164-03-33956656c044ff1f0a3b304f]
Amount of Guidance Needed for Enablement Varies with Art Predictability
Note:
The specification needs to provide less detailed guidance if the art is more predictable and well-known, and more detail if it's unpredictable or nascent.

The amount of guidance or direction needed to enable the invention is inversely related to the amount of knowledge in the state of the art as well as the predictability in the art. In re Fisher, 427 F.2d 833, 839, 166 USPQ 18, 24 (CCPA 1970). The “amount of guidance or direction” refers to that information in the application, as originally filed, that teaches exactly how to make or use the invention. The more that is known in the prior art about the nature of the invention, how to make, and how to use the invention, and the more predictable the art is, the less information needs to be explicitly stated in the specification. In contrast, if little is known in the prior art about the nature of the invention and the art is unpredictable, the specification would need more detail as to how to make and use the invention in order to be enabling. See, e.g., Chiron Corp. v. Genentech Inc., 363 F.3d 1247, 1254, 70 USPQ2d 1321, 1326 (Fed. Cir. 2004) (“Nascent technology, however, must be enabled with a ‘specific and useful teaching.’ The law requires an enabling disclosure for nascent technology because a person of ordinary skill in the art has little or no knowledge independent from the patentee’s instruction. Thus, the public’s end of the bargain struck by the patent system is a full enabling disclosure of the claimed technology.” (citations omitted)).

Jump to MPEP SourceUndue ExperimentationPatent Application ContentEnablement Support for Claims
Topic

Test of Enablement (MPEP 2164.01)

2 rules
MPEP GuidanceInformativeAlways
[mpep-2164-03-c17503f9ceb0f7f164b5e1f8]
Specification Must Provide Detailed Instructions When Art Is Unpredictable
Note:
The specification must provide detailed instructions on how to make and use the invention when little is known about it and the art is unpredictable.

The amount of guidance or direction needed to enable the invention is inversely related to the amount of knowledge in the state of the art as well as the predictability in the art. In re Fisher, 427 F.2d 833, 839, 166 USPQ 18, 24 (CCPA 1970). The “amount of guidance or direction” refers to that information in the application, as originally filed, that teaches exactly how to make or use the invention. The more that is known in the prior art about the nature of the invention, how to make, and how to use the invention, and the more predictable the art is, the less information needs to be explicitly stated in the specification. In contrast, if little is known in the prior art about the nature of the invention and the art is unpredictable, the specification would need more detail as to how to make and use the invention in order to be enabling. See, e.g., Chiron Corp. v. Genentech Inc., 363 F.3d 1247, 1254, 70 USPQ2d 1321, 1326 (Fed. Cir. 2004) (“Nascent technology, however, must be enabled with a ‘specific and useful teaching.’ The law requires an enabling disclosure for nascent technology because a person of ordinary skill in the art has little or no knowledge independent from the patentee’s instruction. Thus, the public’s end of the bargain struck by the patent system is a full enabling disclosure of the claimed technology.” (citations omitted)).

Jump to MPEP SourceTest of Enablement (MPEP 2164.01)Enablement Support for ClaimsPatent Application Content
MPEP GuidanceInformativeAlways
[mpep-2164-03-9bd45014d365674594cc2610]
Enablement Requirement for Nascent Technology
Note:
A full and specific disclosure is required to enable a person of ordinary skill in the art due to limited prior knowledge.

The amount of guidance or direction needed to enable the invention is inversely related to the amount of knowledge in the state of the art as well as the predictability in the art. In re Fisher, 427 F.2d 833, 839, 166 USPQ 18, 24 (CCPA 1970). The “amount of guidance or direction” refers to that information in the application, as originally filed, that teaches exactly how to make or use the invention. The more that is known in the prior art about the nature of the invention, how to make, and how to use the invention, and the more predictable the art is, the less information needs to be explicitly stated in the specification. In contrast, if little is known in the prior art about the nature of the invention and the art is unpredictable, the specification would need more detail as to how to make and use the invention in order to be enabling. See, e.g., Chiron Corp. v. Genentech Inc., 363 F.3d 1247, 1254, 70 USPQ2d 1321, 1326 (Fed. Cir. 2004) (“Nascent technology, however, must be enabled with a ‘specific and useful teaching.’ The law requires an enabling disclosure for nascent technology because a person of ordinary skill in the art has little or no knowledge independent from the patentee’s instruction. Thus, the public’s end of the bargain struck by the patent system is a full enabling disclosure of the claimed technology.” (citations omitted)).

Jump to MPEP SourceTest of Enablement (MPEP 2164.01)Enablement Support for Claims
Topic

Scope Commensurate with Disclosure

1 rules
MPEP GuidanceRequiredAlways
[mpep-2164-03-24bfebf5cb8ef1b1749a573b]
Nascent Technology Requires Specific Teaching
Note:
The specification must provide a specific and useful teaching for nascent technology due to the lack of prior knowledge in the field.

The amount of guidance or direction needed to enable the invention is inversely related to the amount of knowledge in the state of the art as well as the predictability in the art. In re Fisher, 427 F.2d 833, 839, 166 USPQ 18, 24 (CCPA 1970). The “amount of guidance or direction” refers to that information in the application, as originally filed, that teaches exactly how to make or use the invention. The more that is known in the prior art about the nature of the invention, how to make, and how to use the invention, and the more predictable the art is, the less information needs to be explicitly stated in the specification. In contrast, if little is known in the prior art about the nature of the invention and the art is unpredictable, the specification would need more detail as to how to make and use the invention in order to be enabling. See, e.g., Chiron Corp. v. Genentech Inc., 363 F.3d 1247, 1254, 70 USPQ2d 1321, 1326 (Fed. Cir. 2004) (“Nascent technology, however, must be enabled with a ‘specific and useful teaching.’ The law requires an enabling disclosure for nascent technology because a person of ordinary skill in the art has little or no knowledge independent from the patentee’s instruction. Thus, the public’s end of the bargain struck by the patent system is a full enabling disclosure of the claimed technology.” (citations omitted)).

Jump to MPEP SourceScope Commensurate with DisclosureEnablement Support for ClaimsUndue Experimentation
Topic

Enablement Support for Claims

1 rules
MPEP GuidanceInformativeAlways
[mpep-2164-03-a5aed915f48f97672bbfa9ec]
Amount of Guidance Needed for Enablement Varies With Predictability and Prior Art Knowledge
Note:
The specification must provide sufficient guidance based on the predictability of the art and the amount of prior knowledge available.

The amount of guidance or direction needed to enable the invention is inversely related to the amount of knowledge in the state of the art as well as the predictability in the art. In re Fisher, 427 F.2d 833, 839, 166 USPQ 18, 24 (CCPA 1970). The “amount of guidance or direction” refers to that information in the application, as originally filed, that teaches exactly how to make or use the invention. The more that is known in the prior art about the nature of the invention, how to make, and how to use the invention, and the more predictable the art is, the less information needs to be explicitly stated in the specification. In contrast, if little is known in the prior art about the nature of the invention and the art is unpredictable, the specification would need more detail as to how to make and use the invention in order to be enabling. See, e.g., Chiron Corp. v. Genentech Inc., 363 F.3d 1247, 1254, 70 USPQ2d 1321, 1326 (Fed. Cir. 2004) (“Nascent technology, however, must be enabled with a ‘specific and useful teaching.’ The law requires an enabling disclosure for nascent technology because a person of ordinary skill in the art has little or no knowledge independent from the patentee’s instruction. Thus, the public’s end of the bargain struck by the patent system is a full enabling disclosure of the claimed technology.” (citations omitted)).

Jump to MPEP SourceEnablement Support for ClaimsScope Commensurate with DisclosureUndue Experimentation

Citations

Primary topicCitation
Enablement Support for Claims
Scope Commensurate with Disclosure
Test of Enablement (MPEP 2164.01)
Undue Experimentation
Chiron Corp. v. Genentech Inc., 363 F.3d 1247, 1254, 70 USPQ2d 1321, 1326 (Fed. Cir. 2004)
In re Cook, 439 F.2d 730, 734, 169 USPQ 298, 301 (CCPA 1971)
Enablement Support for Claims
Scope Commensurate with Disclosure
Test of Enablement (MPEP 2164.01)
Undue Experimentation
In re Fisher, 427 F.2d 833, 839, 166 USPQ 18, 24 (CCPA 1970)
In re Soll, 97 F.2d 623, 624, 38 USPQ 189, 191 (CCPA 1938)
In re Vaeck, 947 F.2d 488, 496, 20 USPQ2d 1438, 1445 (Fed. Cir. 1991)
In re Wright, 999 F.2d 1557, 1562, 27 USPQ2d 1510, 1513 (Fed. Cir. 1993)

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: 2025-12-31