DIFF Subgroup
C02F 3/10 Packings; Fillings; Grids (packing elements in general B01J19/30, B01J19/32)
Introduced: January 1980
Title
Titles differ between systems:
IPC: Packings; Fillings; Grids
CPC: Packings; Fillings; Grids (packing elements in general B01J19/30, B01J19/32)
Full Title
Full titles differ between systems:
IPC:
Biological treatment of water, waste water, or sewage > Aerobic processes > Packings; Fillings; Grids
CPC:
Biological treatment of water, waste water, or sewage > Aerobic processes > Packings; Fillings; Grids (packing elements in general B01J19/30, B01J19/32)
Of 6 combined children, 0 exist in both systems.
6 codes are CPC-only extensions.
Child Classifications
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