Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5240687 | Brine treatment | Darrell L. Gallup, Allen W. Doty, Morton M. Wong, Charles F. Wong, John L. Featherstone +1 more | 1993-08-31 |
| 5145515 | Treatment of brine | Darrell L. Gallup, John L. Featherstone, Philip H. Messer, Allen W. Doty | 1992-09-08 |
| 5145656 | Brine treatment | Darrell L. Gallup, Allen W. Doty, Morton M. Wong, Charles F. Wong, John L. Featherstone +1 more | 1992-09-08 |
| 5082492 | Recovery of precious metals from aqueous media | Darrell L. Gallup, John L. Featherstone, Philip H. Messer | 1992-01-21 |
| 4776961 | Process for treating geothermal brine in two phase brine separators | Gregory A. Gritters, John L. Featherstone | 1988-10-11 |