Keizo Takayanagi

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Isezaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Sulfoxide compounds and acetone complexes, and a process for produc...
- Patent number 6,545,024
- Issue date Apr 8, 2003
- Eisai Co., Ltd.
- Masahiko Tsujii
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Sulfoxide compounds and acetone complexes, and a process for produc...
- Patent number 6,180,652
- Issue date Jan 30, 2001
- Eisai Co., Ltd.
- Masahiko Tsujii
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
4-cyanopiperidine derivatives
- Patent number 4,721,788
- Issue date Jan 26, 1988
- Eisai Co., Ltd.
- Hiroshi Yamauchi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 7-(2-amino-2-phenylacetamido) cephem...
- Patent number 4,433,142
- Issue date Feb 21, 1984
- Eisai Co., Ltd.
- Keizo Takayanagi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing 2-methyl-3-prenyl-4,5,6-trimethoxyphenol
- Patent number 4,163,864
- Issue date Aug 7, 1979
- Eisai Co., Ltd.
- Eiichi Morita
- C07 - ORGANIC CHEMISTRY