DIFF Subgroup
B01J 23/02 of the alkali- or alkaline earth metals or beryllium
Introduced: July 1974
Full Title
Full titles differ between systems:
IPC:
Catalysts comprising metals or metal oxides or hydroxides, not provided for in group > of the alkali- or alkaline earth metals or beryllium
CPC:
Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 (B01J21/16 takes precedence) > of the alkali- or alkaline earth metals or beryllium
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 1974.
Child Classifications
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