Patent classifications
C
CHEMISTRY; METALLURGY
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C21
METALLURGY OF IRON
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C21C
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
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5/00
Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel; or stainless steel
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C21C5/28
Manufacture of steel in the converter
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C21C5/38
Removal of waste gases or dust
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