Hitoshi Masuda

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Kosakamachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of leaching zinc concentrate
- Patent number 6,475,450
- Issue date Nov 5, 2002
- Dowa Mining Co., Ltd.
- Kaoru Saruta
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process of recovering platinum group metal
- Patent number 5,252,305
- Issue date Oct 12, 1993
- Tanaka Kikinzoku Kogyo K.K.
- Nobuyasu Ezawa
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method of selective separation and concentration of gallium and/or...
- Patent number 4,517,096
- Issue date May 14, 1985
- Dowa Mining Co., Ltd.
- Kunio Sekine
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...