Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859315 | Liquid-solid separation process and apparatus | — | 1989-08-22 |
| 4851108 | Hydrocarbon conversion-regeneration process using dilute and dense beds | Dwight F. Barger | 1989-07-25 |
| 4818373 | Process for upgrading tar and bitumen | William J. Reagan | 1989-04-04 |
| 4804459 | Process for upgrading tar sand bitumen | William J. Reagan | 1989-02-14 |