Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6726811 | Method of purifying N-(2-hydroxyethy)-2-pyrrolidone | Hideto Sugiura, Hitoshi Yano | 2004-04-27 |
| 6489515 | Gas-phase dehydration reaction process | Hideyuki Kambe, Yuuji Shimasaki, Shinji Takasaki | 2002-12-03 |