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Method of treating a sulphide mineral
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Patent number 8,597,933
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Issue date Dec 3, 2013
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BHP Billiton SA Limited
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George Frederick Rautenbach
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Solid matte-oxygen converting process
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Patent number 4,416,690
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Issue date Nov 22, 1983
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Kennecott Corporation
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Kenneth J. Richards
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Use of scavenger in recovery of metal values
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Patent number 3,932,170
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Issue date Jan 13, 1976
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The United States of America as represented by the Secretary of the Interior
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Ishwarlal D. Shah
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3880650
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Patent number 3,880,650
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Issue date Apr 29, 1975
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3857701
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Patent number 3,857,701
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Issue date Dec 31, 1974
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3849120
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Patent number 3,849,120
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Issue date Nov 19, 1974
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3792998
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Patent number 3,792,998
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Issue date Feb 19, 1974
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3775094
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Patent number 3,775,094
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Issue date Nov 27, 1973
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3727587
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Patent number 3,727,587
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Issue date Apr 17, 1973
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C21 - METALLURGY OF IRON
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3703366
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Patent number 3,703,366
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Issue date Nov 21, 1972
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3701648
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Patent number 3,701,648
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Issue date Oct 31, 1972
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...