Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6323305 | Process for preparing polyethylene naphthalate based polymers by using NDCA or its derivates | Hyun-Nam Cho, Hyoung-Wook Lee, Young Chan Ko, Il Seok Choi | 2001-11-27 |
| 6040417 | Process for preparing polyethylene naphthalate based polymers | Hyun-Nam Cho, Young Chan Ko, Il Seok Choi, Young Jin Heo | 2000-03-21 |
| 5708040 | Method for preparing porous membranes utilizing water or organic vapor adsorption | Seong Ryong Ha, Hyun C. Park, Yong Soo Kang, Kyu Hong Ahn | 1998-01-13 |