Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846958 | High severity visbreaking with recycle | Robert J. Feldman, Roger P. Van Driesen, Joseph F. Puzio, Vincent A. Strangio | 1989-07-11 |
| 4795551 | Solvent refining of residues | Gary L. Hamilton, Donald P. Satchell, Jr. | 1989-01-03 |