DIFF Subgroup
F04B 37/08 by condensing or freezing, e.g. cryogenic pumps
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Pumps specially adapted for elastic fluids and having pertinent characteristics not provided for in, or of interest apart from, groups > for evacuating by thermal means > by condensing or freezing, e.g. cryogenic pumps
CPC:
Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 > for evacuating by thermal means > by condensing or freezing, e.g. cryogenic pumps
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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