DIFF Subgroup
B01D 33/70 having feed or discharge devices (B01D33/82 takes precedence)
Introduced: January 1990
Title
Titles differ between systems:
IPC: having feed or discharge devices
CPC: having feed or discharge devices (B01D33/82 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Filters with filtering elements which move during the filtering operation > having feed or discharge devices
CPC:
Filters with filtering elements which move during the filtering operation (filters comprising loose filtering material moving or fluidised during filtration B01D24/28 - B01D24/36; centrifuges B04B) > having feed or discharge devices (B01D33/82 takes precedence)
Of 4 combined children, 3 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1990.
Child Classifications
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- B01D 33/76 for discharging the filter cake, e.g. chutes since 1990 +2 CPC IPC+CPC Available in IPC and CPC