Issued Patents All Time
Showing 26–50 of 61 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5622632 | Process for controlling nitrogen dioxide and/or ammonia emissions from geothermal power plants | — | 1997-04-22 |
| 5614100 | Method for water remediation | — | 1997-03-25 |
| 5531902 | Method for water remediation | — | 1996-07-02 |
| 5462668 | Use of steam to condensate to dilute brine stream additives | John L. Featherstone, Carl E. Flint | 1995-10-31 |
| 5413718 | Use of added water to achieve 100% injection weight in geothermal operations | John L. Featherstone | 1995-05-09 |
| 5409614 | Control of scale deposition in geothermal operations | John L. Featherstone | 1995-04-25 |
| 5364439 | Method to treat geothermal fluid streams | Kevin R. Kitz, Manuel E. Obando, Donald M. Fenton, Paul A. Peaden, Dennis L. Saunders +1 more | 1994-11-15 |
| 5290339 | Platinum recovery | G. Todd Ririe | 1994-03-01 |
| 5288411 | Control of scale deposition in geothermal operations | John L. Featherstone | 1994-02-22 |
| 5268108 | Control of scale deposition in geothermal operations | John L. Featherstone | 1993-12-07 |
| 5256301 | Control of salt precipitation from geothermal brine | Manuel E. Obando | 1993-10-26 |
| 5254225 | Recovery of metallic compounds from geothermal brine | — | 1993-10-19 |
| 5246593 | Silica scale deposition control | — | 1993-09-21 |
| 5240687 | Brine treatment | Allen W. Doty, Morton M. Wong, Charles F. Wong, John L. Featherstone, Jessie P. Reverente +1 more | 1993-08-31 |
| 5190664 | Brine heat exchanger treatment method | Michael L. Barnes, Douglas Cope, Quirino S. Kolimlim, John Leong | 1993-03-02 |
| 5182027 | Process for treating ammonia and nitrite containing waters to reduce nitrogen oxide emissions therefrom | John L. Featherstone | 1993-01-26 |
| 5167834 | Process for treating nitrite-and sulfide-containing water to reduce nitrogen oxide and hydrogen sulfide emissions therefrom | John L. Featherstone | 1992-12-01 |
| 5145656 | Brine treatment | Allen W. Doty, Morton M. Wong, Charles F. Wong, John L. Featherstone, Jessie P. Reverente +1 more | 1992-09-08 |
| 5145515 | Treatment of brine | John L. Featherstone, Jessie P. Reverente, Philip H. Messer, Allen W. Doty | 1992-09-08 |
| 5098578 | Treatment of geothermal brine | John L. Featherstone | 1992-03-24 |
| 5085782 | Process for controlling the pH of a brine | Manuel E. Obando | 1992-02-04 |
| 5082492 | Recovery of precious metals from aqueous media | John L. Featherstone, Jessie P. Reverente, Philip H. Messer | 1992-01-21 |
| 5073270 | Use of reducing agents to control scale deposition from high temperature brine | John W. Jost | 1991-12-17 |
| 5061373 | Process for treating condensate of steam derived from geothermal brine | — | 1991-10-29 |
| 5032284 | Process for treating ammonia and nitrite containing waters to prevent nitric oxide emissions therefrom | John L. Featherstone | 1991-07-16 |