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Patent applications and USPTO patent grants for Zipperian; Donald E..The latest application filed is for "froth flotation apparatus".
Patent | Date |
---|---|
Froth flotation apparatus Grant 5,078,921 - Zipperian January 7, 1 | 1992-01-07 |
Method and apparatus for generating microbubbles in froth flotation mineral concentration systems Grant 4,971,731 - Zipperian November 20, 1 | 1990-11-20 |
Method and apparatus for concentration of minerals by froth flotation using dual aeration Grant 4,735,709 - Zipperian April 5, 1 | 1988-04-05 |
Flotation separating system Grant 4,617,113 - Christophersen , et al. October 14, 1 | 1986-10-14 |
Froth flotation apparatus with water recovery and method Grant 4,394,258 - Zipperian July 19, 1 | 1983-07-19 |
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