Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6056125 | Cross flow cyclonic flotation column for coal and minerals beneficiation | Robert A. Patton | 2000-05-02 |
| 4339348 | Dioxime ion exchangers | John K. Litchfield | 1982-07-13 |
| 4301973 | Beneficiation of iron ore | — | 1981-11-24 |
| 4301124 | Cobalt solvent extraction with dioxime ion exchangers | John K. Litchfield | 1981-11-17 |
| 4274866 | Flotation and sintering of synthetic manganese carbonate | Edwin L. Owen | 1981-06-23 |
| 4248837 | Solvent extraction of copper, nickel with methyl hexyl dioxime | John K. Litchfield | 1981-02-03 |