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Refining of metals
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Patent number 4,086,084
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Issue date Apr 25, 1978
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Matthey Rustenburg Refiners (Pty) Ltd.
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Raymond Edward Oliver
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Recovery of gallium
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Patent number 4,029,499
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Issue date Jun 14, 1977
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Johnson Matthey & Co., Limited
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Walter Westwood
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Separation of noble metals
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Patent number 3,967,956
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Issue date Jul 6, 1976
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Matthey Rustenburg Refiners (Proprietary) Limited
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John Blunden Payne
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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