DIFF Subgroup
B01D 29/44 Edge filtering elements, i.e. using contiguous impervious surfaces
Introduced: January 1985
Full Title
Full titles differ between systems:
IPC:
Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups; Filtering elements therefor > Edge filtering elements, i.e. using contiguous impervious surfaces
CPC:
Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor > Edge filtering elements, i.e. using contiguous impervious surfaces
Of 3 combined children, 2 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1985.
Child Classifications
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