Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875995 | Solid addition and withdrawal | William R. Adams, Mario Baldasarri, John Caspers, Harold J. Trimble | 1989-10-24 |
| 4846958 | High severity visbreaking with recycle | Robert J. Feldman, Andrei Rhoe, Joseph F. Puzio, Vincent A. Strangio | 1989-07-11 |