Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4470899 | Bitumen recovery from tar sands | Jan Hupka | 1984-09-11 |
| 4410417 | Process for separating high viscosity bitumen from tar sands | Manoranjan Misra | 1983-10-18 |
| 4409090 | Process for recovering products from tar sand | Francis V. Hanson, Alex G. Oblad | 1983-10-11 |
| 4399027 | Flotation apparatus and method for achieving flotation in a centrifugal field | — | 1983-08-16 |
| 4397741 | Apparatus and method for separating particles from a fluid suspension | — | 1983-08-09 |
| 4343773 | Enhanced leaching of minerals which form product layers | George Simkovich | 1982-08-10 |
| 4337143 | Process for obtaining products from tar sand | Francis V. Hanson, Alex G. Oblad | 1982-06-29 |
| 4279743 | Air-sparged hydrocyclone and method | — | 1981-07-21 |