DIFF Subgroup
B01J 29/62 Noble metals
Introduced: January 1995
Full Title
Full titles differ between systems:
IPC:
Catalysts comprising molecular sieves > having base-exchange properties, e.g. crystalline zeolites, pillared clays > Crystalline aluminosilicate zeolites; Isomorphous compounds thereof > of the type L > containing iron group metals, noble metals or copper > Noble metals
CPC:
Catalysts comprising molecular sieves > having base-exchange properties, e.g. crystalline zeolites > Crystalline aluminosilicate zeolites; Isomorphous compounds thereof > of the type L, as exemplified by patent document US3216789 > containing iron group metals, noble metals or copper > Noble metals
No child classifications to compare. This is a leaf node in both IPC and CPC.