Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6905872 | On-line respirometer and method of using the same | — | 2005-06-14 |
| 6892968 | Nozzle assembly for use in the treatment of waste water | Don V. Mathsen | 2005-05-17 |
| 6877726 | Saturation vessel for use in the treatment of waste water | Don V. Mathsen | 2005-04-12 |
| 5256278 | Direct coal liquefaction process | Melanie D. Hetland | 1993-10-26 |
| 4846963 | Ionic liquefaction process | Curtis L. Knudson, Sylvia A. Farnum | 1989-07-11 |