Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4452491 | Recovery of hydrocarbons from deep underground deposits of tar sands | Leonard Seglin | 1984-06-05 |
| 4288293 | Form coke production with recovery of medium BTU gas | — | 1981-09-08 |