What are the steps for identifying appropriate groups for classification in CPC?

The MPEP 905.03(b) outlines the general procedure for identifying appropriate groups for classification in the Cooperative Patent Classification (CPC) system:

1. Identify appropriate subclasses:
   • Review subclass titles for scope coverage
   • Consult subclass notes, references, and definitions
   • Repeat until a suitable subclass is verified
2. Identify appropriate group(s):
   • Identify candidate main groups
   • Verify notes, references, and definitions don’t exclude the subject matter
   • Ensure the group is in active use
3. Select the most appropriate group:
   • Choose the group that most completely covers the invention
   • Follow special rules like Last Place Priority Rule (LPPR) or First Place Priority Rule (FPPR) when applicable
   • Consult scheme notes and definitions for special classification rules
4. Consider application/functional classification places
5. Identify genus/species classification places
6. Use residual classification places if necessary

The MPEP emphasizes: “Whenever classifying into a group, the scheme should always be consulted for precedence notes and references that indicate a preference for classification in another group.”

To learn more:

• CPC
• classification procedure
• subclasses
• groups
• patent examination