Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5240687 | Brine treatment | Darrell L. Gallup, Allen W. Doty, Charles F. Wong, John L. Featherstone, Jessie P. Reverente +1 more | 1993-08-31 |
| 5145656 | Brine treatment | Darrell L. Gallup, Allen W. Doty, Charles F. Wong, John L. Featherstone, Jessie P. Reverente +1 more | 1992-09-08 |
| 5102556 | Method for rendering ferric hydroxide sludges recyclable | — | 1992-04-07 |
| 4980139 | Method for removing chlorine from a gas stream | Paula J. Bosserman | 1990-12-25 |
| 4888053 | Chloride leaching of iron-based, heavy metal-containing sludges | Gerard Grayson | 1989-12-19 |
| 4869066 | Method for the production of usable steam and non-toxic solids from geothermal brine | D. Stephen Pye, John L. Featherstone, Darrell L. Gallup, Gregory A. Gritters, Daniel Hoyer | 1989-09-26 |
| 4763479 | Method for the production of useable steam and non-toxic solids from geothermal brine | Daniel Hoyer, John L. Featherstone | 1988-08-16 |
| 4710367 | Process for reducing the concentration of heavy metals in geothermal brine sludge | Arnold L. Shugarman | 1987-12-01 |
| 4181588 | Method of recovering lead through the direct reduction of lead chloride by aqueous electrolysis | Frank P. Haver | 1980-01-01 |