Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7879971 | Multiblock copolymer, method of preparing the same, polymer electrolyte membrane prepared from the multiblock copolymer, method of preparing the polymer electrolyte membrane, and fuel cell employing the polymer electrolyte membrane | Hae-kyoung Kim, Won-mok Lee, Hyuk Chang, Sam Dae Park, Yun Ju Chang | 2011-02-01 |
| 7759453 | Multiblock copolymer, method of preparing the same, polymer electrolyte membrane prepared from the multiblock copolymer, method of preparing the polymer electrolyte membrane, and fuel cell employing the polymer electrolyte membrane | Hae-kyoung Kim, Won-mok Lee, Hyuk Chang, Sam Dae Park, Yoon-ju Chang | 2010-07-20 |
| 6046342 | 3, 6-bis[4-(alkyloxy) phenyloxy] pyromellitic dianhydrides and process for preparing the same | Kyung-Hoon Lee | 2000-04-04 |
| 5489616 | Process for manufacturing phosphoric acid-type chelate resin as uranyl ion absorbents | In Hwan Park, Kil-Yeong Choi, Jae-Oh Joo | 1996-02-06 |
| 5457163 | Phosphonic acid chelating resins for uranyl ion adsorption | In Hwan Park, Kil-Yeong Choi, Jae-Oh Joo | 1995-10-10 |