IPC Subgroup
C22B 21/02 with reducing
Introduced: September 1968
Last revised: January 2006
Full Title
Obtaining aluminium > with reducing
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- Subclass:
- PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS