Keiji Mitarai

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Shinnanyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for treating an amine-containing waste water
- Patent number 5,039,424
- Issue date Aug 13, 1991
- Tosoh Corporation
- Keiji Mitarai
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Process for producing polyethylenepolyamine
- Patent number 4,980,507
- Issue date Dec 25, 1990
- Tosoh Corporation
- Norimasa Mizui
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing polyamines
- Patent number 4,845,297
- Issue date Jul 4, 1989
- Toyo Soda Manufacturing Co., Ltd.
- Sadakatsu Kumoi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for producing bis [.beta.(N,N-dimethylamino)ethyl]ether
- Patent number 4,625,064
- Issue date Nov 25, 1986
- Toyo Soda Manufacturing Co., Ltd.
- Sadakatsu Kumoi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for producing bis[.beta.-(N,N-dimethylamino)alkyl]-ether
- Patent number 4,492,803
- Issue date Jan 8, 1985
- Toyo Soda Manufacturing Co., Ltd.
- Sadakatsu Kumoi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing chain structured corpuscular calcium carbonate
- Patent number 4,157,379
- Issue date Jun 5, 1979
- Toyo Soda Manufacturing Co., Ltd.
- Junji Arika
- B82 - NANO-TECHNOLOGY