Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4722395 | Viscous oil recovery method | — | 1988-02-02 |
| 4487262 | Drive for heavy oil recovery | Winston R. Shu | 1984-12-11 |
| 4469177 | Recovery of viscous oil from asphaltic oil-containing formations | — | 1984-09-04 |