DIFF Subgroup
C08G 18/7806 Full Title
Polymeric products of isocyanates or isothiocyanates > with compounds having active hydrogen > characterised by the isocyanates or isothiocyanates used > Polyisocyanates or polyisothiocyanates > having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur > Nitrogen
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.