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GB207977A
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Process of concentrating ores
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US1417263A
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Concentration of ores
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US1417262A
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Process of concentration of ores
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GB173830A
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Reagent for concentration of ore by flotation and method of making and process of using the same
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US1473192A
|
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Ore-concentrating process
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US1448929A
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Concentration of ores by flotation
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US1425327A
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Flotation process
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US1457708A
|
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Composition of matter
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US1478237A
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Composition of matter and process of using the same
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GB133277A
|
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An Improved Mineral Selective Agent and the Methods of Producing and Using same.
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GB139535A
|
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Improvements in or relating to ore concentration
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GB133498A
|
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Mineral Selective and Frothing Agent and Processes or Methods of Producing and Using the same.
|
|
US1448928A
|
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Method of concentrating ores
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US1386716A
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Frothing and mineral selective agent and process of using the same
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