Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| H1161 | Aqueous coal slurry | Mark Berggren, Wilbur W. Swanson | 1993-04-06 |
| 4713086 | Oil-compatible coal/water mixtures | William E. Horst, Anirudh K. Bhasin | 1987-12-15 |
| 4582512 | Chemical leaching of coal to remove ash, alkali and vanadium | Dale K. Huggins, Mark Berggren, Kurt R. Anast | 1986-04-15 |
| 4529506 | Method for cleaning fine coal | — | 1985-07-16 |