Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5188709 | Crude oil processing apparatus for heavy oil extraction | Ronald E. Brown | 1993-02-23 |
| 4992162 | Method and apparatus for heavy oil extraction | Ronald E. Brown | 1991-02-12 |
| 4652342 | Retorting process using an anti-bridging mechanical agitator | — | 1987-03-24 |
| 4563247 | Retort with anti-bridging mechanical agitator | — | 1986-01-07 |