Treatment of sludge; Devices therefor

Introduced: January 1980

Of 9 combined children, 5 exist in both systems.

4 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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C02F 11/002 CPC only CPC only
C02F 11/004 CPC only CPC only
C02F 11/006 CPC only CPC only
C02F 11/008 CPC only CPC only
C02F 11/02 Biological treatment since 1980 IPC+CPC Available in IPC and CPC
C02F 11/06 by oxidation (incinerators for burning waste liquors, e.g. sulfite liquor from paper-making plant F23G7/04) since 1980 IPC+CPC Available in IPC and CPC
C02F 11/10 by pyrolysis since 1980 IPC+CPC Available in IPC and CPC
C02F 11/12 by de-watering, drying or thickening since 1980 IPC+CPC Available in IPC and CPC
C02F 11/18 by thermal conditioning (by pyrolysis C02F11/10) since 1980 +1 CPC IPC+CPC Available in IPC and CPC

Class C02,2013–2023, worldwide · Source: EPO PATSTAT

Class C02,2013–2023, worldwide · Source: EPO PATSTAT