Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5015366 | Process and apparatus for coal hydrogenation | Theodore B. Simpson | 1991-05-14 |
| 4775387 | Sulfur removal and comminution of carbonaceous material | Nand K. Narain, Dennis Smith | 1988-10-04 |
| 4735706 | Process and apparatus for coal hydrogenation | — | 1988-04-05 |
| 4695372 | Conditioning of carbonaceous material prior to physical beneficiation | Robert P. Warzinski | 1987-09-22 |