DIFF Subgroup
B01D 37/02 Precoating the filter medium; Addition of filter aids to the liquid being filtered
Introduced: September 1968
Title
Titles differ between systems:
IPC: Precoating the filtering elements or material; Addition of filter aids to the liquid being filtered
CPC: Precoating the filter medium; Addition of filter aids to the liquid being filtered
Full Title
Full titles differ between systems:
IPC:
Processes of filtration > Precoating the filtering elements or material; Addition of filter aids to the liquid being filtered
CPC:
Processes of filtration (processes specially adapted for filtering gases B01D46/00) > Precoating the filter medium; Addition of filter aids to the liquid being filtered
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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