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Solvent extraction process
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Patent number 6,632,410
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Issue date Oct 14, 2003
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Cognis Corporation
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Sang I. Kang
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Copper recovery process
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Patent number 5,908,605
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Issue date Jun 1, 1999
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Henkel Corporation
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Michael J. Virnig
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Solvent extraction
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Patent number 4,544,532
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Issue date Oct 1, 1985
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Henkel Corporation
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Gary A. Kordosky
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Solvent extraction
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Patent number 4,507,268
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Issue date Mar 26, 1985
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Henkel Corporation
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Gary A. Kordosky
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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