MPEP § 905.01(a)(3) — Warnings Found in CPC schemes (Annotated Rules)

§905.01(a)(3) Warnings Found in CPC schemes

USPTO MPEP version: BlueIron's Update: 2026-01-17

This page consolidates and annotates all enforceable requirements under MPEP § 905.01(a)(3), 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.

Warnings Found in CPC schemes

This section addresses Warnings Found in CPC schemes. Contains: 2 permissions and 1 other statement.

Key Rules

Topic

Sequence Listing Requirements

3 rules
MPEP GuidanceInformativeAlways
[mpep-905-01-a-3-08c6227d93267e98332e044c]
Warning for IPC Deviations or Incomplete Classification in CPC Schemes
Note:
A warning is used to signal deviations from IPC or incomplete classification in CPC schemes, including listing missing IPC groups and transferring CPC groups.

A warning is used in CPC schemes for signaling deviations from IPC or incomplete classification. A warning may include a listing of IPC groups not included within CPC and the CPC group which covers the relevant subject matter. A warning also may be used to indicate the deletion or transferring of CPC groups and reclassification notices.

Jump to MPEP SourceSequence Listing Requirements
MPEP GuidancePermittedAlways
[mpep-905-01-a-3-bd4017e326986ee92d867d40]
Warning for Listing IPC Groups Not Included in CPC
Note:
A warning may list IPC groups not included within CPC and the CPC group covering the relevant subject matter.

A warning is used in CPC schemes for signaling deviations from IPC or incomplete classification. A warning may include a listing of IPC groups not included within CPC and the CPC group which covers the relevant subject matter. A warning also may be used to indicate the deletion or transferring of CPC groups and reclassification notices.

Jump to MPEP SourceSequence Listing Requirements
MPEP GuidancePermittedAlways
[mpep-905-01-a-3-cb0ef70dae910be4b5fd24be]
Warning for CPC Group Deletions and Transfers
Note:
A warning indicates the deletion or transferring of CPC groups and reclassification notices in CPC schemes.

A warning is used in CPC schemes for signaling deviations from IPC or incomplete classification. A warning may include a listing of IPC groups not included within CPC and the CPC group which covers the relevant subject matter. A warning also may be used to indicate the deletion or transferring of CPC groups and reclassification notices.

Jump to MPEP SourceSequence Listing Requirements

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: 2026-01-17