Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4816069 | Method for converting cobalt to cobalt metal powder | Alan D. Douglas, Martin B. MacInnis | 1989-03-28 |
| 4808384 | Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material | Judith A. Ladd, Martin B. MacInnis, Mary A. Fedorchak | 1989-02-28 |
| 4804407 | Method for recovering cobalt from hexammine cobaltic (111) solutions | Richard A. Scheithauer, Michael J. Miller | 1989-02-14 |