Yoichi Hiraga

Person

Shin-nanyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Method for removing organic materials from a wet process phosphoric...
- Patent number 4,637,922
- Issue date Jan 20, 1987
- Toyo Soda Manufacturing Co., Ltd.
- Masaki Nakatani
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for recovering ethyleneamines
- Patent number 4,582,937
- Issue date Apr 15, 1986
- Toyo Soda Manufacturing Co., Ltd.
- Yoichi Hiraga
- C07 - ORGANIC CHEMISTRY
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
Stable calcium hypochlorite composition and method for manufacture...
- Patent number 4,355,014
- Issue date Oct 19, 1982
- Toyo Soda Manufacturing Co., Ltd.
- Tsugio Murakami
- 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
Purification of phosphoric acid
- Patent number 4,208,389
- Issue date Jun 17, 1980
- Toyo Soda Manufacturing Company, Limited
- Yoichi Hiraga
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for removing dissolved silica from extracted phosphoric acid
- Patent number 4,169,881
- Issue date Oct 2, 1979
- Toyo Soda Manufacturing Co., Ltd.
- Mitsuo Kikuchi
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Phosphoric acid purification
- Patent number 4,154,805
- Issue date May 15, 1979
- Toyo Soda Manufacturing Co., Ltd.
- Yoichi Hiraga
- C01 - INORGANIC CHEMISTRY

Yoichi Hiraga

Person

Patents Grantslast 30 patents

Method for removing organic materials from a wet process phosphoric...

Process for recovering ethyleneamines

Solvent extraction method of phosphoric acid

Stable calcium hypochlorite composition and method for manufacture...

Purification of wet process phosphoric acid

Purification of phosphoric acid

Process for removing dissolved silica from extracted phosphoric acid

Phosphoric acid purification