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1959-09-29
Method of extracting non-ferrous metals from metal bearing material
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1959-05-07
Method of extracting nonferrous metals from metal bearing material
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1959-05-07
Method of extracting nonferrous metals from metal bearing material
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1959-05-07
Method of extracting nonferrous metals from metal bearing material
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1959-05-07
Method of extracting nonferrous metals from metal bearing material
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1956-07-31
Method and installations for casting metals
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1957-04-30
Method of extracting metal values from metal bearing material
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1958-08-21
A method of extracting nonferrous metal values from metal bearing material
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1958-08-21
A method of extracting nonferrous metal values from metal bearing material
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1959-05-26
Extraction of metals from ores
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1956-03-20
Method of recovering metals from iron sulphide-bearing materials
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1957-11-12
Removal of dissolved gas from molten non-ferrous metals and alloys thereof
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1956-10-25
Hydrometallurgical method of separating metal values from metal bearing carbonate ores
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1959-12-29
Mthod of and installation for processing dross of non-ferrous metals
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1959-08-11
Method of casting metals
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1956-10-25
Hydrometallurgical method of separating metal values from metal bearing carbonate ores
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1958-09-04
Process of extracting precious metals from their ores
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1955-08-25
Method of extracting metal values from metal bearing material
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1957-02-26
Hydrometallurgical method of extracting metal values
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1958-02-04
Method of making solid metal articles directly from ores
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1961-10-31
Method of feni alloy production from nickel bearing iron ores
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1960-02-02
Method of making ingot of non-ferrous metals and alloys thereof
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1960-04-28
Removing of tramp metal from continuous processes
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1958-09-04
Process of extracting precious metals from their ores
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1955-08-25
Method of extracting metal values from metal bearing material