Process for milling and media separation
Patent 5662279 Issued on September 2, 1997. Estimated Expiration Date: 
December 5, 2015. 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.
December 5, 2015. 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 3104068 3313491 3601322 3713593 Method and apparatus for grinding particulate solids Apparatus for dispersing finely divided solid particles in a liquid vehicle Method of crushing particles of material in a ball mill Metal flake production Ball mill Sandmill vessel with inlet diffuser and removeable outlet filter InventorsApplicationNo. 567794 filed on 12/05/1995US Classes:241/21, Liquids added to make pulp or suspension241/24.11, Including separating liquid from solid241/171, With feed and/or discharge241/172, With independent means moving or guiding the material and/or grinding bodies in receptacle241/184Grinding bodiesExaminersPrimary: Rosenbaum, MarkAttorney, Agent or FirmForeign Patent References
International ClassB02C 017/16AbstractA method of preparing milled solid particles of a compound comprises the steps of forming a slurry of a liquid medium, the compound and rigid milling media in a milling chamber, contacting the compound with the milling media while in the chamber to reduce the particle size of the compound, and thereafter separating the compound from the milling media by vacuum filtration through a removable filter probe immersed in the slurry. In a preferred embodiment, the milling media is a polymeric resin having a mean particle size of less than 300 μm. The method enables the use of fine milling media which provides extremely fine particles of the compound while avoiding problems, e.g., decrease yields due to separator screen plugging, associated with prior art processes.Other References
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