What are C* designations in patent application classification?

C* designations refer to Cooperative Patent Classification (CPC) symbols used to classify patent applications. These designations play a crucial role in the automated routing of applications to appropriate examiners. According to MPEP 909.01(a): “…the assigned examiner may submit a classification challenge to have a C* designation added and/or a C* designation removed.” C* designations represent…

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