Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853447 | Polymerization of cationic N,N-dimethylalkylamine type monomers | — | 1989-08-01 |
| 4847342 | Cationic-hydrogen bonding type hydrophobically associating copolymers | — | 1989-07-11 |
| 4837288 | Novel polyampholyte compositions possessing high degrees of acid, base, or salt tolerance in solution | Robert D. Lundbeeg | 1989-06-06 |