Process for the separation of minerals by flotation
Patent 5047144 Issued on September 10, 1991. Estimated Expiration Date: 
September 26, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 26, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2187930 3017028 3582461 3819048 Flotation process for the enrichment of bauxites Processes for flotation of mineral substances Process for beneficiation of mineral values Novel frother composition for beneficiation of mineral ores Froth flotation process Patent #: 4514292 InventorsAssigneeApplicationNo. 412596 filed on 09/26/1989US Classes:209/166, With modifying agents209/167, Preferential252/61Froth-flotation or differential adherenceExaminersPrimary: Silverman, Stanley S.Assistant: Popovics, Robert J. Attorney, Agent or FirmForeign Patent References
International ClassB03D 001/14Foreign Application Priority Data1985-05-22 DEAbstractThe present invention provides a process for the separation of minerals by flotation in the presence of activators and suppressors. Activators are cation-active condensation products and suppressors are anion-active products of aminoplast formers, formaldehyde and amines, ammonium salts, acids or a sulphite, in combination with either an anion-active or cation-active tensides.Other References
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