Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4338183 | Method of solvent extraction of coal by a heavy oil | — | 1982-07-06 |
| 4326945 | Coal liquefaction process | John F. Flagg, Russell W. Johnson | 1982-04-27 |
| 4312747 | Process for deashing primary coal liquids | — | 1982-01-26 |