DIFF Subgroup
B01J 27/28 Regeneration or reactivation
Introduced: July 1974
Full Title
Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds > Regeneration or reactivation
Of 3 combined children, 2 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1974.
Child Classifications
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- B01J 27/30 of catalysts comprising compounds of sulfur, selenium or tellurium since 1974 IPC+CPC Available in IPC and CPC
- B01J 27/32 of catalysts comprising compounds of halogens since 1974 IPC+CPC Available in IPC and CPC