Ore flotation
December 28, 2010. 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 2400213 Electromagnetically operated audible signal generator Froth flotation process for recovering sheelite Flotation process of lead-, copper-, uranium- and rare earth minerals Beneficiation of phosphate ore Process for the froth flotation of calcium phosphate-containing minerals and flotation agents therefor Use of C8-34 alpha olefin sulfonates to improve and enhance the flotation and collection process used for barite Enrichment process by flotation of phosphate-containing ores with carbonated and/or siliceous gangues, by amphoteric collecting agents 3-Oxypropyleneimino-bis-(methylene phosphonic acids) and their salts, process for their manufacture and their use Process for treating cassiterite ore Patent #: 4482454 InventorsAssigneeApplicationNo. 634803 filed on 12/28/1990US Classes:209/166, With modifying agents252/61Froth-flotation or differential adherenceExaminersPrimary: Silverman, Stanley S.Assistant: Lithgow, Thomas M. Attorney, Agent or FirmForeign Patent References
International ClassesB03D 001/014B03D 001/02 Foreign Application Priority Data1983-03-29 GBAbstractOres of metal oxides and oxide-like compounds such as chromite and pyrochlore are beneficiated by froth flotation in the presence of substituted amino phosphonic acids or salts thereof. | |
