|
US1508629A
|
|
Method of producing molybdenum and molybdenum compounds
|
|
US1449462A
|
|
Method and apparatus for the electrolytic recovery of copper
|
|
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|
|
Method of electrolytically precipitating metals and compounds from solutions
|
|
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|
|
Process for the treatment of manganese ores
|
|
US1236504A
|
|
Art of concentration of ores by flotation.
|
|
US1119478A
|
|
Process of extracting copper from ores.
|
|
US1119477A
|
|
Method of extracting copper from ores.
|
|
US1069305A
|
|
Process for electrolytically refining copper.
|
|
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|
|
Process of precipitating copper from solution.
|
|
US723949A
|
|
Process of separating copper from ores.
|
|
US708098A
|
|
Envelop.
|
