DIFF Subgroup
B01D 37/04 Controlling the filtration
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Processes of filtration > Controlling the filtration
CPC:
Processes of filtration (processes specially adapted for filtering gases B01D46/00) > Controlling the filtration
Of 5 combined children, 0 exist in both systems.
5 codes are CPC-only extensions.
Child Classifications
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