IPC Main Group
C22B 21/00 Obtaining aluminium
Introduced: September 1968
Last revised: January 2006
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
Related Keywords
ALUMINIUM, ALUMINUM
3 direct subcodes
Child Classifications
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- C22B 21/02 with reducing
- C22B 21/04 with alkali metals
- C22B 21/06 Refining