Issued Patents 1989
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 | S. Timothy Spang, David G. Newell, Darrell L. Gallup | 1989-10-17 |
| 4869066 | Method for the production of usable steam and non-toxic solids from geothermal brine | D. Stephen Pye, Darrell L. Gallup, Gregory A. Gritters, Daniel Hoyer, Morton M. Wong | 1989-09-26 |