Biological treatment of water, waste water, or sewage

Introduced: January 1980

Of 9 combined children, 5 exist in both systems.

4 codes are CPC-only extensions.

Note: 2 CPC extensions are marked as secondary classification only.

IPC defines codes here since 1980.

Child Classifications

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C02F 2003/001 2nd only +1 CPC CPC only CPC only
C02F 2003/008 2nd only CPC only CPC only
C02F 3/005 CPC only CPC only
C02F 3/006 CPC only CPC only
C02F 3/02 Aerobic processes since 1980 +1 CPC IPC+CPC Available in IPC and CPC
C02F 3/28 Anaerobic digestion processes since 1980 +10 CPC IPC+CPC Available in IPC and CPC
C02F 3/30 Aerobic and anaerobic processes since 1980 +3 CPC IPC+CPC Available in IPC and CPC
C02F 3/32 characterised by the animals or plants used, e.g. algae since 1980 +2 CPC IPC+CPC Available in IPC and CPC
C02F 3/34 characterised by the microorganisms used since 1980 +8 CPC IPC+CPC Available in IPC and CPC