Patents per Year
Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4722783 | Conditioning of recycle shale in retorting process | P. Henrik Wallman, James Richard Ouimette | 1988-02-02 | $33,928,000 |
| 4579644 | Temperature gradient in retort for pyrolysis of carbon containing solids | Byron G. Spars | 1986-04-01 | $12,669,000 |
| 4330397 | Fluid-contacting process | — | 1982-05-18 | $10,932,000 |
| 4293401 | Shale retorting with supplemental combustion fuel | Byron G. Spars | 1981-10-06 | $92,892,000 |