Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6149859 | Gasification plant for direct reduction reactors | Frederick C. Jahnke, James S. Falsetti, Gary Foulds | 2000-11-21 |
| 5997100 | Inertization system for highwall mining | Gordon Alexander Marshall | 1999-12-07 |
| 5820223 | Inertization system for highwall mining | Gordon Alexander Marshall | 1998-10-13 |
| 5117800 | Oxygen enrichment of fuels | Harry C. Watson, Eric E. Milkins | 1992-06-02 |
| 4869727 | Production of hardened coal agglomerates | — | 1989-09-26 |
| 4436618 | Recovery of coal from coal handling operations | Thomas G. Callcott | 1984-03-13 |