Osamu Watanabe

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Shin-nanyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Solvent extraction method of phosphoric acid
- Patent number 4,377,562
- Issue date Mar 22, 1983
- Toyo Soda Manufacturing Co., Ltd.
- Yoichi Hiraga
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Purification of wet process phosphoric acid
- Patent number 4,349,519
- Issue date Sep 14, 1982
- Toyo Soda Manufacturing Company, Ltd.
- Yoichi Hiraga
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method of removing scale caused by raffinate in a phosphoric acid p...
- Patent number 4,104,079
- Issue date Aug 1, 1978
- Toyo Soda Manufacturing Co., Ltd.
- Sakumi Fujii
- C01 - INORGANIC CHEMISTRY