DIFF Subgroup
C08G 18/3842 Full Title
Polymeric products of isocyanates or isothiocyanates > with compounds having active hydrogen > characterised by the compounds used containing active hydrogen > Low-molecular-weight compounds > having heteroatoms other than oxygen (C08G18/32 takes precedence)
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.