CPC A to H
CPC Rules
CAT
Revisions
POCs
100

This section covers vehicle technologies, printing and manufacturing

What is Section B?

100

This type of classification is used to indicate the disclosure of the document includes an addition to the state of the art (novel or unobvious subject matter)

What is Inventive information? (I-type)

100

This directory lookup can be used to find examiners knowledgeable in particular classification areas of CPC

What is the QN or SCE Directory?

100

The CAT homepage has a link to this form which examiners and SPEs can use to request revision projects

What is the revision request form?
100

This person is a SPE in 3600 available to answer questions related to CPC, revisions, and classification challenges

Who is an SCE SPE? (Anna or Anita)

200

This section covers furniture, clothing, medical devices, life saving equipment and agriculture

What is Section A?

200

This information in the scheme informs users when the rules of classification in the scheme different from the norm

What are Special Rules of Classification?

200

This icon displayed next to a CPC symbol indicates that the symbol represents at least one concept claimed in the application

What is a solid star?

200

The CPC scheme is jointly maintained by the US and this partnering patent office

What is the EPO? (European Patent Office)

200

This title is abbreviated with the letters QN and is given to examiners knowledgeable in search and classification in a particular portion of CPC.

What is a Quality Nominee?

300

This section covers engineering components, weapons, engines and pumps

What is Section F?

300

This type of classification is used to indicate the disclosure of the document includes non-trivial subject matter that is not in itself an addition to the state of the art but constitutes useful information for search

What is Additional information? (A-type)

300

This icon allows users to agree with a foreign CPC allocation and add a US allocation to that symbol

What is a thumbs up? (endorsement)

300

This process follows a revision project and involves the reallocation of classification symbols to patent documents as a result of the revision.

What is a reclassification?

300

Rinaldi Rada, our recently retired Director, would often travel to Europe to negotiate with what organization?

What is the EPO? (European Patent Office)

400

This section covers nuclear technology, measuring and testing, optics, signals, computing and controls

What is Section G?

400

This type of reference informs as to areas that might be useful for search

What is an Informative reference?

400

This icon displayed next to a CPC symbol indicates that the symbol represents at least one concept claimed in a family application but not the current application

What is a hollow star?

400

A revision project can be requested by this individual

Who is an Examiner? (SPE, QN, SCE, etc.)

400

This title is abbreviated with the letters SCE and is given to detailed examiners specializing in classification of a range of symbols in CPC.

What is a Search and Classification Examiner?

500

This section covers railways, earth engineering, mining and drilling, and buildings including components such as doors, windows and locks

What is Section E?

500

This type of reference informs as to what subject matter is excluded from the scope of the classification place

What is a Limiting reference?

500

Continuations, Divisionals, and related foreign patent documents are linked together using this identifier

What is the Family ID?

500

These notices placed within the classification scheme inform users when a reclassification is in progress

What are warnings?

500

This person is a QN in your area

Who is ___?