Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4549934 | Flash zone draw tray for coker fractionator | Harry R. Janssen, George A. Kurdy | 1985-10-29 |
| 4541453 | High temperature slide valve | Harry R. Janssen, Don L. Edwards, Don D. Duren | 1985-09-17 |
| 4518487 | Process for improving product yields from delayed coking | Harry R. Janssen | 1985-05-21 |
| 4409068 | Injector for calciner | Richard L. Davis, Don L. Edwards | 1983-10-11 |
| 4407700 | Injector for calciner | Richard L. Davis, Don L. Edwards, William B. Macbeth, Jr. | 1983-10-04 |
| 4344754 | Water cooled vertical gas distributor | Harry R. Janssen, Don L. Edwards | 1982-08-17 |