IPC Subgroup
C01B 33/021 Preparation
Introduced: January 1990
Last revised: January 2006
Full Title
Silicon; Compounds thereof > Silicon > Preparation
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
2 direct subcodes
Child Classifications
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- C01B 33/023 by reduction of silica or silica-containing material
- C01B 33/027 by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material