Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4434043 | Recovery of catalyst from coal liquefaction residues | Gopal H. Singhal | 1984-02-28 |
| 4408999 | Coal and oil shale beneficiation process | Rollie B. Williams | 1983-10-11 |
| 4365975 | Use of electromagnetic radiation to recover alkali metal constituents from coal conversion residues | Rollie B. Williams | 1982-12-28 |