ST

Shigefumi Tokumasu

SC Sumitomo Chemical: 5 patents #946 of 4,033Top 25%
📍 Ooita, JP: #98 of 516 inventorsTop 20%
Overall (All Time): #1,038,292 of 4,157,543Top 25%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
6960698 Method for treating tar Mamoru Seino 2005-11-01
6423876 Process for producing dihydroxybenzene 2002-07-23
5962747 Process for producing 1,3-di-(2-hydroperoxy-2-propyl) benzene Hideo Ohki, Toshikazu Ohmae 1999-10-05
5959155 Process for the extraction of hydroperoxides Toshikazu Ohmae, Hideo Ohki 1999-09-28
5138109 Process for preparing halogenated alkyl Michio Yamamoto, Masaru Ishino, Motoo Hazama 1992-08-11