Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4397653 | Method of producing a colloidal fuel from coal and a heavy petroleum fraction | — | 1983-08-09 |
| 4188191 | Process for reducing the sulfur content of coal and coal char and the ignition temperature of coal char | Leon Robinson | 1980-02-12 |