CPC - Cooperative Patent Classification

• joint project of EPO and USPTO
• other office (Korea, China) plan to use CPC in the future
• used since 2013, constant updates
• more than 225.000 notations
• classification during the examining process, will be applied to the documents (based on patent families) later by the EPO (only US documents are published with CPC)
• supersedes USClass and ECLA