Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840775 | Method for removing sodium and chloride from cobaltic hydroxide | Eric F. Husted | 1989-06-20 |
| 4808384 | Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material | Clarence D. Vanderpool, Martin B. MacInnis, Mary A. Fedorchak | 1989-02-28 |
| 4798708 | Process for recovering chromium and other metal values from chromium bearing material | Michael J. Miller | 1989-01-17 |