Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874529 | Process and apparatus for reducing the concentration of suspended solids in clarified geothermal brine | John L. Featherstone, S. Timothy Spang, Darrell L. Gallup | 1989-10-17 |
| 4728438 | Process for reducing the concentration of suspended solids in clarified geothermal brine | John L. Featherstone, Stefan T. Spang | 1988-03-01 |