DIFF Subgroup
F28F 23/02 Arrangements for obtaining or maintaining same in a liquid state
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Features relating to the use of intermediate heat-exchange materials, e.g. selection of compositions > Arrangements for obtaining or maintaining same in a liquid state
CPC:
Features relating to the use of intermediate heat-exchange materials, e.g. selection of compositions (heat-transfer, heat-exchange or heat-storage materials C09K5/00) > Arrangements for obtaining or maintaining same in a liquid state
No child classifications to compare. This is a leaf node in both IPC and CPC.