Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880529 | Separation of polymetallic sulphides by froth flotation | Robert S. Salter | 1989-11-14 |
| 4877517 | Depressant for flotation separation of polymetallic sulphidic ores | Tim M. Jessup | 1989-10-31 |
| 4853113 | Froth Flotation of bastnaesite | — | 1989-08-01 |