How often is the USPC Index updated?

The USPC Index is regularly updated to ensure its accuracy and relevance. As stated in MPEP 902.01(a):

“The Index is regularly updated.”

This regular updating process helps maintain the Index’s usefulness as a tool for patent classification and searching. Users should always refer to the most recent version of the Index when conducting their searches.

To learn more:

• USPC
• Patent Classification
• Index Updates
• USPTO Procedures