DIFF Subgroup
C04B 14/322 Full Title
Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone (expanding or defibrillating materials C04B20/00) > Granular materials > Carbides; Nitrides; Borides
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.