How does the USPTO determine the proper CPC classification for a new patent application?

The USPTO determines the proper CPC classification for a new patent application through a multi-step process: Initial Review: The application is reviewed to understand its subject matter. Pre-Classification Search: A search is conducted to identify relevant CPC symbols. Symbol Selection: The most appropriate CPC symbols are selected based on the invention’s technical features. Primary Classification:…

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How do patent examiners use Notes in CPC schemes?

Patent examiners rely heavily on Notes in CPC schemes to ensure accurate and consistent classification of patent applications. The MPEP 905.01(a)(2) provides insight into how Notes are structured: “Instruction in a ‘Note’ is applied only to the CPC place where it appears, including all its hierarchically lower places.” Patent examiners use Notes in several ways:…

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