Shigefumi Tokumasu

Follow

Person

Kisarazu-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Method for treating tar
- Patent number 6,960,698
- Issue date Nov 1, 2005
- Sumitomo Chemical Compnay, Limted
- Mamoru Seino
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing dihydroxybenzene
- Patent number 6,423,876
- Issue date Jul 23, 2002
- Sumitomo Chemical Company, Limited
- Shigefumi Tokumasu
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing 1,3-di-(2-hydroperoxy-2-propyl) benzene
- Patent number 5,962,747
- Issue date Oct 5, 1999
- Sumitomo Chemical Co., Ltd.
- Shigefumi Tokumasu
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the extraction of hydroperoxides
- Patent number 5,959,155
- Issue date Sep 28, 1999
- Sumitomo Chemical Company, Limited
- Toshikazu Ohmae
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing halogenated alkyl
- Patent number 5,138,109
- Issue date Aug 11, 1992
- Sumitomo Chemical Company, Ltd.
- Michio Yamamoto
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
Method for treating tar
- Publication number 20030183557
- Publication date Oct 2, 2003
- Sumitomo Chemical Company, Limited
- Mamoru Seino
- C07 - ORGANIC CHEMISTRY