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Method for smelting oxide ore
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Patent number 10,626,480
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Issue date Apr 21, 2020
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Sumitomo Metal Mining Co., Ltd.
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Takashi Iseki
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3791819
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Patent number 3,791,819
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Issue date Feb 12, 1974
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2986459
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Patent number 2,986,459
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Issue date May 30, 1961
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C21 - METALLURGY OF IRON
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2974035
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Patent number 2,974,035
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Issue date Mar 7, 1961
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2375291
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Patent number 2,375,291
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Issue date May 8, 1945
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2259342
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Patent number 2,259,342
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Issue date Oct 14, 1941
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2207350
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Patent number 2,207,350
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Issue date Jul 9, 1940
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2197259
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Patent number 2,197,259
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Issue date Apr 16, 1940
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C21 - METALLURGY OF IRON
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2113880
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Patent number 2,113,880
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Issue date Apr 12, 1938
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C21 - METALLURGY OF IRON
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2076885
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Patent number 2,076,885
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Issue date Apr 13, 1937
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C21 - METALLURGY OF IRON
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1916054
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Patent number 1,916,054
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Issue date Jun 27, 1933
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...