What are warnings in CPC schemes?

Warnings in CPC (Cooperative Patent Classification) schemes are used to signal deviations from the International Patent Classification (IPC) or indicate incomplete classification. As stated in MPEP 905.01(a)(3):

“A warning is used in CPC schemes for signaling deviations from IPC or incomplete classification.”

These warnings serve as important indicators for patent examiners and researchers to understand potential differences between CPC and IPC classifications.

To learn more:

• CPC
• IPC
• patent classification
• warnings
• deviations