Keiichi Yokota

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Kashima, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for producing thiosalicylic acid
- Patent number 6,768,022
- Issue date Jul 27, 2004
- Air Water Chemical Inc.
- Keiichi Yokota
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method of separating isomers of nitrotoluic acid
- Patent number 6,054,609
- Issue date Apr 25, 2000
- Sumikin Chemical Co., Ltd.
- Keiichi Yokota
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Production method for alkoxynaphthalenecarboxylic acid
- Patent number 5,550,284
- Issue date Aug 27, 1996
- Sumikin Chemical Co., Ltd.
- Toshio Sato
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for manufacturing 5-hydroxyisophthalic acid
- Patent number 5,416,256
- Issue date May 16, 1995
- Sumikin Chemical Co., Ltd.
- Takeshi Namekata
- C07 - ORGANIC CHEMISTRY