Susumu Otsuka

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Niigata, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of purifying isophthalonitrile
- Patent number 6,509,490
- Issue date Jan 21, 2003
- Mitsubishi Gas Chemical Co INC
- Susumu Otsuka
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for producing xylylenediamine
- Patent number 6,476,269
- Issue date Nov 5, 2002
- Mitsubishi Gas Chemical Co INC
- Kenichi Nakamura
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
Method for producing xylylenediamine
- Publication number 20020038054
- Publication date Mar 28, 2002
- Kenichi Nakamura
- C07 - ORGANIC CHEMISTRY
Information Patent Application
Method of purifying isophthalonitrile
- Publication number 20020035287
- Publication date Mar 21, 2002
- Susumu Otsuka
- C07 - ORGANIC CHEMISTRY