Takayuki Kitahara

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Wakayama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Process for producing dihydroxydiphenylsulfone
- Patent number 6,974,886
- Issue date Dec 13, 2005
- Konishi Chemical Ind. Co., Ltd.
- Fumio Oi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Sulfonating agent and sulfonation process
- Patent number 5,596,128
- Issue date Jan 21, 1997
- Konishi Chemical Ind. Co., Ltd.
- Eiji Ogata
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
Process for producing dihydroxydiphenyl sulfone
- Publication number 20050171384
- Publication date Aug 4, 2005
- Fumio Oi
- C07 - ORGANIC CHEMISTRY