Catalysts, in general, characterised by their form or physical properties

Introduced: July 1974

Of 8 combined children, 7 exist in both systems.

1 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 2024.

Child Classifications

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B01J 35/19 CPC only CPC only
B01J 35/20 characterised by their non-solid state since 2024 IPC+CPC Available in IPC and CPC
B01J 35/30 characterised by their physical properties since 2024 +2 CPC IPC+CPC Available in IPC and CPC
B01J 35/40 characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) since 2024 IPC+CPC Available in IPC and CPC
B01J 35/50 characterised by their shape or configuration since 2024 +1 CPC IPC+CPC Available in IPC and CPC
B01J 35/60 characterised by their surface properties or porosity since 2024 IPC+CPC Available in IPC and CPC
B01J 35/70 characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00) since 2024 +3 CPC IPC+CPC Available in IPC and CPC
B01J 35/80 characterised by their amorphous structures since 2024 IPC+CPC Available in IPC and CPC