What are combination sets in CPC classification?

Combination sets are a feature of the Cooperative Patent Classification (CPC) system that allow for enhanced storage and retrieval of classification information. According to MPEP 905.03(c): “In certain CPC fields, the examiner has the ability to create and search on combinations of CPC symbols (provided as groupings of symbols), each symbol in a grouping has…

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What classification systems are used in patent searches?

Patent searches utilize multiple classification systems to organize and search for prior art. According to MPEP 904.02(a), the main classification systems used are: Cooperative Patent Classification (CPC) U.S. Patent Classification (USPC) Other organized systems of literature The MPEP states: “Every group/subgroup and secondary classification area of the Cooperative Patent Classification, class/subclass of the U.S. Patent…

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What is the Classification Challenge Procedure in CPC?

The Classification Challenge Procedure in CPC is a process where patent examiners can challenge the designated CPC (Cooperative Patent Classification) symbols on a nonprovisional utility patent application if they believe the classifications are incorrect. According to MPEP 909.01(d): “When, in the opinion of the assigned examiner, the C* designated CPC symbol(s) on a nonprovisional utility…

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When should a Classification Challenge be submitted in relation to a restriction requirement?

When a restriction requirement is applicable, a Classification Challenge should be submitted only after an election has been made. This ensures that the challenge is based on the elected claims. As stated in MPEP 909.01(d): “In those applications in which a restriction is considered proper by the examiner, an election must be made prior to…

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What tool is used to track Classification Challenges?

The USPTO uses the Classification Allocation Tool (CAT) to track and manage Classification Challenges. According to MPEP 909.01(d): “SPEs and examiners must use the Classification Allocation Tool (CAT) classification challenge pages which create a record of the classification challenge history of each application and facilitates tracking of classification challenges of applications.” The CAT serves several…

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What is a C-STAR (C*) in CPC classification?

A C-STAR (C*) is an important designation in the Cooperative Patent Classification (CPC) system. 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.” Key points about C-STAR: It is mandatory to apply C*…

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What is a C* classification challenge?

A C* classification challenge is a process initiated by an examiner when they believe the C* (C-Star) designated CPC symbols on a patent application are incorrect. According to MPEP 909.01(d): “When, in the opinion of the assigned examiner, the C* designated CPC symbol(s) on a nonprovisional utility patent application are incorrect, they must initiate a…

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