Issued Patents 1989
Showing 1–3 of 3 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, David G. Newell | 1989-10-17 |
| 4869066 | Method for the production of usable steam and non-toxic solids from geothermal brine | D. Stephen Pye, John L. Featherstone, Gregory A. Gritters, Daniel Hoyer, Morton M. Wong | 1989-09-26 |
| 4830766 | Use of reducing agents to control scale deposition from high temperature brine | John W. Jost | 1989-05-16 |