Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883585 | Ore flotation and sulfenyl dithiocarbamates as agents for use therein | Rector P. Louthan | 1989-11-28 |
| 4877518 | Ore flotation employing dimercaptothiadiazoles | — | 1989-10-31 |
| 4806234 | Ore flotation | Harold W. Mark | 1989-02-21 |