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Junichi Nishikawa
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Osaka-shi, JP
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last 30 patents
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Patent Grant
Process for producing 2,6-dihalogenopurine
Patent number
7,321,035
Issue date
Jan 22, 2008
Sumitomo Chemical Company, Limited
Naruhito Masai
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for producing 2,6-dihalogenopurine
Patent number
6,936,713
Issue date
Aug 30, 2005
Sumitomo Chemical Company, Limited
Naruhito Masai
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for preparing 2,6-dichloropurine
Patent number
6,455,696
Issue date
Sep 24, 2002
Sumika Fine Chemicals Co., Ltd.
Taketo Hayashi
C07 - ORGANIC CHEMISTRY
Patents Applications
last 30 patents
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Patent Application
Process for producing 2,6-dihalogenopurine
Publication number
20050090666
Publication date
Apr 28, 2005
Sumitomo Chemical Company, Limited
Naruhito Masai
C07 - ORGANIC CHEMISTRY
Information
Patent Application
Process for producing 2,6-dihalogenopurine
Publication number
20030144508
Publication date
Jul 31, 2003
Naruhito Masai
C07 - ORGANIC CHEMISTRY
Information
Patent Application
Process for preparing 2,6-dichloropurine
Publication number
20020004598
Publication date
Jan 10, 2002
Sumika Fine Chemicals Co., Ltd.
Taketo Hayashi
C07 - ORGANIC CHEMISTRY