Issued Patents 2005
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6974886 | Process for producing dihydroxydiphenylsulfone | Fumio Oi, Takayuki Kitahara, Nobuyuki Nate | 2005-12-13 |
| 6965054 | Process for producing mixture of dihydroxydiphenylsulfone isomers | Fumio Oi, Masamichi Yamamoto | 2005-11-15 |
| 6861562 | Process for producing mixture of dihydroxydiphenylsulfone isomers | Fumio Oi, Hiroyuki Yamamoto | 2005-03-01 |