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DIFF Subgroup
B01J 21/08

Silica

Introduced: July 1974

Full Title

Full titles differ between systems:

IPC:

Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium > Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof > Silica

CPC:

Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium > Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof > Silica

No child classifications to compare. This is a leaf node in both IPC and CPC.