What is C-STAR (C*) information in CPC classification and why is it important?
C-STAR (C*) information is a crucial aspect of CPC classification that identifies claimed concepts within a patent application. According to MPEP 905.03(a):
“A C-STAR (C*) is applied to an allocated symbol from the classification picture on an application when that symbol represents at least one concept that is claimed.”
C* designations are important because they:
- Highlight the specific aspects of the invention that are being claimed
- Help examiners and searchers focus on the core elements of the patent
- Must be applied to at least one CPC symbol in the classification picture
The MPEP further states:
“There is no limit to the number of the CPC symbols within the classification picture of an application that can be designated as a C*, but at least one CPC symbol must be designated as a C*.”
This ensures that the claimed subject matter is accurately represented in the classification, facilitating more precise prior art searches and examination.
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