Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4619738 | Apparatus for oil shale retorting | Arthur E. Lewis, Richard G. Mallon, Otis Walton | 1986-10-28 |
| 4601811 | Process for oil shale retorting using gravity-driven solids flow and solid-solid heat exchange | Arthur E. Lewis, Richard G. Mallon, Otis Walton | 1986-07-22 |
| 4539917 | Combustion heater for oil shale | Richard G. Mallon, Otis Walton, Arthur E. Lewis | 1985-09-10 |