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US2976115A
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Method for preparing oxides of niobium and tantalum
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US2934426A
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Recovery of high purity pentachlorides of niobium and tantalum from mixtures thereof
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US2934428A
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Method for treating nickel sulphide ore concentrates
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GB780290A
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Improvements in stainless steel
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US2816015A
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Method for recovering nickel and cobalt from ores
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US2772961A
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Method of smelting
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US2741553A
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Method for producing a matte from arsenical sulfide cobalt ores
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GB755492A
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Improvements in reduction of metal oxides
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GB779413A
|
|
Improvements in hard non-ferrous articles and method for making the same
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US2829046A
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Stainless steel
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US2772959A
|
|
Method of electric furnace smelting of silicate ores
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GB746521A
|
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Improvements in method of treating arsenical sulphide cobalt ores
|
|
GB733990A
|
|
Improvements in recovery of tin from tin bearing materials
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|
US2698229A
|
|
Reduction of metal oxides
|
|
US2752236A
|
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Method of recovering tin from in bearing materials
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ES201718A1
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A method for the reduction of metallic oxides (Machine-translation by Google Translate, not legally binding)
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GB723257A
|
|
Improvements in reduction of metal oxides
|
|
US2653867A
|
|
Reduction of metal oxides
|
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GB687385A
|
|
Improvements in production of aluminium-silicon alloys
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US2573153A
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Recovery of nickel from nickel silicate ore
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