Norio Yanase

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Wakayama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Process for producing high-purity 4,4′-dihydroxydiphenyl sulfone
- Patent number 7,456,321
- Issue date Nov 25, 2008
- Konishi Chemical Ind. Co., Ltd.
- Eiji Ogata
- C07 - ORGANIC CHEMISTRY
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
Process for producing mixture of dihydroxydiphenylsulfone isomers
- Patent number 6,965,054
- Issue date Nov 15, 2005
- Konishi Chemical Ind. Co., Ltd.
- Fumio Oi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing mixture of dihydroxydiphenylsulfone isomers
- Patent number 6,861,562
- Issue date Mar 1, 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 high-purity 4,4'-dihydroxydiphenyl sulfone
- Publication number 20050272956
- Publication date Dec 8, 2005
- Eiji Ogata
- C07 - ORGANIC CHEMISTRY
Information Patent Application
Color developer and thermal recording material containing the same
- Publication number 20050272603
- Publication date Dec 8, 2005
- Fumio Oi
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
Process for producing dihydroxydiphenyl sulfone
- Publication number 20050171384
- Publication date Aug 4, 2005
- Fumio Oi
- C07 - ORGANIC CHEMISTRY
Information Patent Application
Process for producing mixture of dihydroxydiphenylsulfone isomers
- Publication number 20040254400
- Publication date Dec 16, 2004
- Fumio Oi
- C07 - ORGANIC CHEMISTRY
Information Patent Application
Process for producing mixture of dihydroxydiphenylsulfone isomers
- Publication number 20040242935
- Publication date Dec 2, 2004
- Fumio Oi
- C07 - ORGANIC CHEMISTRY