IPC Subgroup
C22B 34/32 Obtaining chromium
Introduced: July 1974
Last revised: January 2006
Full Title
Obtaining refractory metals > Obtaining chromium, molybdenum or tungsten > Obtaining chromium
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
CHROMIUM