Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4804407 | Method for recovering cobalt from hexammine cobaltic (111) solutions | Richard A. Scheithauer, Clarence D. Vanderpool | 1989-02-14 |
| 4798708 | Process for recovering chromium and other metal values from chromium bearing material | Judith A. Ladd | 1989-01-17 |