Novel collectors and processes for making and using same
Patent 4871466 Issued on October 3, 1989. Estimated Expiration Date: 
October 15, 2007. 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.
October 15, 2007. 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 2397508 3145082 3438494 3464784 Preparation from hydroxylammonium sulfate of oximes and hydroxamic acids via alcoholic hydroxylamine solution Purification of kaolin clay by froth flotation using hydroxamate collectors Patent #: 4629556 InventorsAssigneeApplicationNo. 07/108611 filed on 10/15/1987US Classes:252/61, Froth-flotation or differential adherence209/166, With modifying agents562/621Hydroxamic acids, chalcogen analogs or salts thereof (i.e., compounds having the -C(=X)-N(R)-XH group or the -C(XH)=NXR group, wherein R may be hydrogen or substitution for hydrogen, the X's in each group may be the same or diverse chalcogens, and H of -XH in each group may be replaced by a group IA or IIA light metal, or by substituted or unsubstituted ammonium)ExaminersPrimary: Lacey, David L.Assistant: Lithgow, Thomas M. Attorney, Agent or FirmInternational ClassesB03D 1/01 (20060101)B03D 1/018 (20060101) B03D 1/004 (20060101) C09C 1/40 (20060101) C09C 1/42 (20060101) AbstractA method for the production of alkyl or alkaryl hydroxamic acids and/or salts wherein a C8 -C22 alcohol is employed with water as the solvent is disclosed as well as the resultant salt and/or acid solutions per se and their use in the flotation of non-sulfide minerals, preferably clay.Other References
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