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DE523099C
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Extraction of copper from oxides or oxidized ores
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US1679294A
|
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Treatment of ores of copper and other metals
|
|
US1703763A
|
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Treatment of ores for extracting metallic values therefrom
|
|
DE483429C
|
|
Extraction of copper or lead from their oxidic, oxidized or roasted ores
|
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GB296899A
|
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Improvements in the wet extraction of copper
|
|
GB287207A
|
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Treatment of ores or other materials for extracting lead sulphate therefrom
|
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US1648761A
|
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Treatment of ores for the extraction of values
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US1648760A
|
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Treatment of ores for the extraction of values
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US1553223A
|
|
Treatment of ores for the extraction of values
|
|
DE449635C
|
|
Treatment of ores and concentrates
|
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GB226258A
|
|
Improvements in the treatment of ores for the extraction of values
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