Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859384 | Novel polyamide reverse osmosis membranes | Ja-Young Koo, David J. Forgach, Robert J. Petersen, Donald L. Schmidt, Ritchie A. Wessling +1 more | 1989-08-22 |
| 4839203 | Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups | Thomas E. Davis, Donald L. Schmidt, Jee I. Kau, Ritchie A. Wessling, Sharon S. Whipple +1 more | 1989-06-13 |
| 4828700 | Rejection enhancing coatings for reverse osmosis membranes | Michael J. Colucci, David J. Forgach, Ritchie A. Wessling, Donald L. Schmidt | 1989-05-09 |
| 4797187 | Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups | Thomas E. Davis, Donald L. Schmidt, Jee I. Kau, Ritchie A. Wessling, Sharon S. Whipple +1 more | 1989-01-10 |