Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888116 | Method of improving membrane properties via reaction of diazonium compounds or precursors | John E. Cadotte | 1989-12-19 |
| 4885355 | Water-insoluble polymers from cyclic sulfonium compounds | Ritchie A. Wessling, Kiyoshi AIKAWA | 1989-12-05 |
| 4859384 | Novel polyamide reverse osmosis membranes | Richard F. Fibiger, Ja-Young Koo, David J. Forgach, Robert J. Petersen, Ritchie A. Wessling +1 more | 1989-08-22 |
| 4839203 | Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups | Thomas E. Davis, Jee I. Kau, Ritchie A. Wessling, Sharon S. Whipple, Richard F. Fibiger +1 more | 1989-06-13 |
| 4828700 | Rejection enhancing coatings for reverse osmosis membranes | Richard F. Fibiger, Michael J. Colucci, David J. Forgach, Ritchie A. Wessling | 1989-05-09 |
| 4812238 | Membranes prepared via reaction of diazonium compounds or precursors | John E. Cadotte | 1989-03-14 |
| 4797187 | Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups | Thomas E. Davis, Jee I. Kau, Ritchie A. Wessling, Sharon S. Whipple, Richard F. Fibiger +1 more | 1989-01-10 |
| 4797456 | Aqueous-dispersible cyclic sulfonium compounds that cure to form water-insoluble polymers | Ritchie A. Wessling, Kiyoshi AIKAWA | 1989-01-10 |