DIFF Main Group
C02F 9/00 Multistage treatment of water, waste water or sewage
Introduced: January 1980
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 2023.
Child Classifications
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- C02F 9/20 Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems since 2023 IPC+CPC Available in IPC and CPC