Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9365536 | Method for producing glycolide, which is provided with rectification step by means of gas-liquid countercurrent contact, and method for purifying crude glycolide | Takuya Ohzawa, Naoki Hayashi, Kazuyuki Yamane | 2016-06-14 |
| 7781600 | Process for purifying hydroxycarboxylic acid, process for producing cyclic ester, and process for producing polyhydroxycarboxylic acid | Tomoyuki Ogawa, Tomohiro Hoshi, Tsutomu Kushida | 2010-08-24 |
| 6693204 | Method for purification of cyclic ester | Tetsuo Ejiri, Kazuyuki Yamane | 2004-02-17 |