Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7566676 | Preparation method of solid titanium catalyst for olefin polymerization | Chun-Byung Yang, Ho-Sik Chang | 2009-07-28 |
| 7151071 | Method for preparation of a solid titanium catalyst for olefin polymerization | Sang-Yull Kim, Chun-Byung Yang, Ho-Sik Chang | 2006-12-19 |
| 7012156 | Preparation method of methacrylic acid | Jin S. Yoo | 2006-03-14 |
| 6194607 | Method of producing aromatic carboxylic acids by oxidizing alkyl aromatic hydrocarbons or partially oxidized intermediates thereof | Sung Hwa Jhung, Youn-Seok Park, Jin S. Yoo, Jong Hyun Chae | 2001-02-27 |
| 6180822 | Method of producing aromatic carboxylic acids by oxidizing alkyl aromatic compounds or partially oxidized intermediates thereof with carbon dioxide containing gas | Sung Hwa Jhung, Youn-Seok Park, Jin S. Yoo | 2001-01-30 |
| 5916915 | Water-in-stable L-ascorbic acid derivative and a method for preparation thereof, and a skin-whitening cosmetic composition containing the same | Jong Eon Hong, Jun Chul Cho, Jang Sob Lee, Jung-No Lee, Ji Min Chun +3 more | 1999-06-29 |
| 5681790 | Catalyst for preparing methacrylic acid | Young Chul Kim, Eun Hee Jin | 1997-10-28 |
| 5373443 | Method for imaging with low frequency electromagnetic fields | Gan Q. Xie | 1994-12-13 |