Which types of patents still use the USPC classification system?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-27 2 Rules 5 Related FAQs This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice. According to MPEP 903 , the United States Patent Classification (USPC) system is still used for specific types of patents: “Only design and plant applications/patents and plant application publications receive classification designations under USPC.” This means that while utility patents have transitioned to the CPC system, design patents and plant patents continue to be classified using the USPC system. This distinction is important for patent searchers and examiners working with these specific types of patents. Related Rules from the Manual of Patent Examining Procedure 2 rules Collapse Design and Plant Patent Classification Required MPEP 903 Utility Patents and Applications Require CPC Classification MPEP 903 Other Related FAQs 5 FAQs Collapse How is the classification of a new patent application determined? What is the difference between basic subject matter and features for additional purposes in patent classification? How does the USPC system classify subcombinations of general utility? Where can I find more information about the Cooperative Patent Classification (CPC) system? What types of documents are included in the patent classification system?