Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4927540 | Ionic complex for enhancing performance of water treatment membranes | Ritchie A. Wessling, Richard F. Fibiger | 1990-05-22 |
| 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, Richard F. Fibiger +1 more | 1989-06-13 |
| 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, Richard F. Fibiger +1 more | 1989-01-10 |
| 4756836 | Downhole hydrogen sulfide scavenging in drilling mud using iron chelates | Gaines C. Jeffrey, Lance A. Cooper | 1988-07-12 |
| 4704324 | Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups | Thomas E. Davis, Donald L. Schmidt, Jee I. Kau, Ritchie A. Wessling, Richard F. Fibiger +1 more | 1987-11-03 |
| 4451442 | Removal of hydrogen sulfide from fluid streams with minimum production of solids | Gaines C. Jeffrey, Lance A. Cooper | 1984-05-29 |