Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853110 | Method for separating arsenic and/or selenium from shale oil | Daniel Francis Ryan | 1989-08-01 |
| 4824558 | Coal liquefaction process with metal/iodine cocatalyst | Peter S. Maa, Lonnie W. Vernon, William E. Winter | 1989-04-25 |