Koichi Hirai

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Hiromachi, JP

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Patents Grantslast 30 patents

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Silyl enol ether alkylation process
- Patent number 5,719,275
- Issue date Feb 17, 1998
- Sankyo Company, Limited
- Koichi Hirai
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Metal catalyzed displacement process
- Patent number 5,681,951
- Issue date Oct 28, 1997
- Sankyo Company, Limited
- Koichi Hirai
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Carbapenem
- Patent number 5,614,624
- Issue date Mar 25, 1997
- Sankyo Company, Limited
- Koichi Hirai
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Azetidinone compounds useful in the preparation of carbapenem antib...
- Patent number 5,541,317
- Issue date Jul 30, 1996
- Sankyo Company, Limited
- Koichi Hirai
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Thiomarinol compounds
- Patent number 5,399,711
- Issue date Mar 21, 1995
- Sankyo Company, Limited
- Shuji Takahashi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
N-benzhydryl-substituted heterocyclic derivatives, their preparatio...
- Patent number 5,028,610
- Issue date Jul 2, 1991
- Sankyo Company Limited
- Koichi Hirai
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Amino-acid derivatives, their preparation and their use as pharmace...
- Patent number 4,545,942
- Issue date Oct 8, 1985
- Sankyo Company, Limited
- Mitsuo Nagano
- C07 - ORGANIC CHEMISTRY