IPC Main Group
C22B 61/00 Obtaining metals not elsewhere provided for in this subclass
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
POLONIUMRHENIUMTHALLIUM