Issued Patents 1997
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684105 | Process for providing homogeneous copolymers of vinylpyrrolidone and 3-dimethylaminopropyl methacrylamide (DMAPMA) which form clear aqueous solutions having high cloud points | Yuanzhen Zhong | 1997-11-04 |
| 5672634 | Crosslinked PVP-I2 foam product | Susan Y. Tseng | 1997-09-30 |
| 5663258 | Strongly swellable, moderately crosslinked copolymers of vinylpyrrolidone and vinyl acetate | Yuanzhen Zhong | 1997-09-02 |
| 5654385 | One-step process for making lightly-crosslinked polyvinylpyrrolidone hydrogel | Susan Y. Tseng, Thomas E. Royster | 1997-08-05 |
| 5614583 | Homogenized flowable hydrogel of crosslinked N-vinyl lactam polymer | Susan Y. Tseng, Jui-Chang Chuang | 1997-03-25 |
| 5604275 | Color stabilized aqueous n-vinyl heterocyclic copolymer solutions | Yuanzhen Zhong | 1997-02-18 |