What is a C* classification challenge?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-27 10 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. 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 C* challenge through the Classification Allocation Tool (CAT) and complete the C* challenge form indicating any and all challenges to any C* designations including suggested additions of C* designations.” This process ensures that applications are correctly classified and assigned to the most appropriate examiners. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse SPEs and Examiners Must Use CAT Classification Challenge Pages MPEP 909.01(d) Required Challenge Incorrect CPC Designations MPEP 909.01(d) Required Challenge Must Include Reasoning for C* Designations MPEP 909.01(d) Required Rerouting Based on New C* Designations MPEP 909.01(d) Recommended C* Designation May Be Modified Due to Withdrawal of Non-Elected Claims MPEP 909.01(d) Prohibited Provisional Applications Not Classified or Assigned MPEP 909.01(b) Application Must Be Fully Classified on Receipt MPEP 909.01(b) Required Consult Examiner for Proper Classification MPEP 909.01(d) Recommended Classifications Required for Examiner Assignment MPEP 909.01(b) Permitted Examiner Makes Restriction Requirement Unless Classification Incomplete MPEP 909.01(d) Other Related FAQs 5 FAQs Collapse When should a C* classification challenge be submitted for applications with restriction requirements? What happens if a C* classification challenge results in changes? What t...