Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5078921 | Froth flotation apparatus | — | 1992-01-07 |
| 4971731 | Method and apparatus for generating microbubbles in froth flotation mineral concentration systems | — | 1990-11-20 |
| 4735709 | Method and apparatus for concentration of minerals by froth flotation using dual aeration | — | 1988-04-05 |
| 4639313 | Floatation apparatus for concentration of minerals from high water content aqueous slurries | — | 1987-01-27 |
| 4617113 | Flotation separating system | John A. Christophersen, Fred J. Marquardt | 1986-10-14 |
| 4394258 | Froth flotation apparatus with water recovery and method | — | 1983-07-19 |