DIFF Subgroup
C10G 31/06 by heating, cooling, or pressure treatment
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for > by heating, cooling, or pressure treatment
CPC:
Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for (by distillation C10G7/00) > by heating, cooling, or pressure treatment
No child classifications to compare. This is a leaf node in both IPC and CPC.