Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6667029 | Stable, aqueous cationic hydrogel | Yuanzhen Zhong, Janusz Jachowicz, Roger Mc Mullen | 2003-12-23 |
| 6359128 | Free-flowing flakes of vinyl caprolactam monomer and process for making same | Arvind Mathur, James A. Dougherty | 2002-03-19 |
| 6124415 | Crosslinked polyvinylpyrrolidone (PVPP) copolymer of vinyl pyrrolidone (VP) and monomer derived from 1-vinyl-3-(E)-ethylidene pyrrolidone (EVP) | Edward G. Malawer, Victor A. Kabanov, Kolazi S. Narayanan, Michael A. Tallon, Susan Y. Tseng | 2000-09-26 |
| 6011160 | Crosslinked polyvinylpyrrolidone (PVPP) copolymer of vinyl pyrrolidone (VP) and monomer derived from 1-vinyl-3-(E)-ethylidene pyrrolidone (EVP) | Edward G. Malawer, Victor A. Kabanov, Kolazi S. Narayanan, Michael A. Tallon, Susan Y. Tseng | 2000-01-04 |
| 5912312 | Homogeneous copolymers containing vinyl pyrrolidone and 2-methylene-1,3-dioxepane and process for making same | Yuanzhen Zhong, Edward G. Malawer, Kolazi S. Narayanan | 1999-06-15 |
| 5723524 | Method for preventing or retarding the formation of gas hydrates | Jeffrey M. Cohen, William D. Young | 1998-03-03 |
| 5716634 | Clear, homogenized, flowable hydrogel of crosslinked N-vinyl lactam polymer | Susan Y. Tseng, Jui-Chang Chuang | 1998-02-10 |
| 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 |
| 5567786 | Polymerizable composition of vinylpyrrolidone and vinyl caprolactam | Susan Y. Tseng | 1996-10-22 |
| 5534564 | Process for the color stabilization of an aqueous N-vinyl heterocyclic copolymer solution | Yuanzhen Zhong | 1996-07-09 |
| 5502136 | Process for making substantially homogeneous copolymers of vinyl pyrrolidone and vinyl acetate which form clear aqueous solutions | Yuanzhen Zhong, Yakir Reuven | 1996-03-26 |
| 5468820 | Reactive diluent for radiation curing of film-forming polymers | James A. Dougherty | 1995-11-21 |
| 5393825 | Films and extrusions of cured crosslinked vinyl lactam polymer and method of preparation | Susan Y. Tseng, William J. Burlant | 1995-02-28 |
| 5393854 | Colorless, purified polymerizable composition useful for the production of crosslinked polyvinylpyrrolidone | Susan Y. Tseng | 1995-02-28 |
| 5391668 | Colorless, purified polymerizable composition useful for the production of crosslinked polyvinylpyrrolidone | Susan Y. Tseng | 1995-02-21 |
| 5362796 | Molded crosslinked vinyl lactam polymer gel and method of preparation | Susan Y. Tseng | 1994-11-08 |
| 5360883 | Process for obtaining a polymerizable reaction solution | Susan Y. Tseng | 1994-11-01 |
| 5354823 | Films and extrusions of cured crosslinked vinyl lactam polymer and method of preparation | Susan Y. Tseng, William J. Burlant | 1994-10-11 |
| 5342964 | Process for obtaining the isomeric compound 1-vinyl-3(E)-ethylidene pyrrolidone | Susan Y. Tseng | 1994-08-30 |
| 5336697 | Molded cellular crosslinked vinyl lactam polymer gel and method of preparation | Susan Y. Tseng | 1994-08-09 |