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US2209331A
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Roasting process
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US2208974A
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Process for the refining of silicon alloys
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US2195961A
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Process for the production of low carbon metals and alloys
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US2031947A
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Process for the refining of alloys
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US2048861A
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Process of producing refractory bodies
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US2029773A
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Process for obtaining products containing spinels
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US1951091A
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Method of manufacturing chromium of chromium alloys
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US1946161A
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Method of manufacturing low-carbon chromium alloys
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US2048263A
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Highly refractory mass produced by melting
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US1967530A
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Method of producing chromium alloys low in carbon
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US1833076A
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Process for the manufacture of aluminum and aluminum alloys
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US1837543A
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Process for producing products containing both alpha sulphide and aluminum oxide
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US1811314A
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Refractory material
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US1764511A
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Process for producing metals and alloys
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US1951976A
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Process for producing alloyed iron and steel
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US1857844A
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Process for production of aluminum oxide and other aluminum combinations
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US1797655A
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Process for the production of aluminum oxide or products containing aluminum oxide out of material containing aluminum sulphide
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US1731976A
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Process for producing metals and alloys
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US1794401A
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Process for producing metals and alloys
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US1512462A
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Process for the manufacture of metals, alloys, and the like
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