What is the Index to the U.S. Patent Classification System?

Question

Accepted Answer

Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-27 9 Rules 5 Related FAQs This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice. The Index to the U.S. Patent Classification System (USPC) is an alphabetic listing of technical and common terms that refer to specific classes and subclasses within the USPC. As stated in MPEP 902.01(a) : “The Index to the U.S. Patent Classification System (USPC) is an alphabetic listing of technical and common terms referring to specific classes and subclasses of the USPC.” This index serves as an initial entry point into the classification system, helping users locate relevant classes and subclasses for their patent searches or applications. Related Rules from the Manual of Patent Examining Procedure 9 rules Collapse Index to U.S. Patent Classification System Used for Initial Entry MPEP 902.01(a) Review Class Schedules and Subclasses Even When Index Citation Seems Specific MPEP 902.01(a) Recommended Index Not Exhaustive for USPC Search MPEP 902.01(a) Recommended Classification Orders Affect Existing Definitions MPEP 902.02 Recommended Examiner Definitions Must Be Updated Periodically MPEP 902.02 Recommended Classification Orders Available Online for USPTO Personnel MPEP 902.02 Classification Home Page Must Be Accessible via Toolkit MPEP 902.02 Index Must Be Regularly Updated MPEP 902.01(a) Suggestions for Index Changes Directed to TCs MPEP 902.01(a) Recommended Other Related FAQs 5 FAQs Collapse How comprehensive is the USPC Index? How often is the USPC Index updated? How can I suggest changes to the USPC Index? Where can USPTO personnel access the USPC Index? How can patent examiners access the Classification Home Page?