Process for drying and expanding microspheres
Patent 4397799 Issued on August 9, 1983. Estimated Expiration Date: 
December 18, 2001. 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 18, 2001. 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 2797201 3611583 3615972 3651182 3779941 3914360 InventorsAssigneeApplicationNo. 06/332195 filed on 12/18/1981US Classes:264/53, Liquid to gas phase change264/41, PORE FORMING IN SITU (E.G., FOAMING, ETC.)521/57Including step of surface coating a particle or process of expanding a surface coated particleExaminersPrimary: Anderson, PhilipAttorney, Agent or FirmInternational ClassesB01J 13/20 (20060101)C08J 9/32 (20060101) C08J 9/00 (20060101) C08J 9/228 (20060101) Foreign Application Priority Data1981-01-14 SEAbstractThe present invention relates to a process for drying and expanding microspheres whereby first a dispersion of the microspheres in an inert liquid is prepared. This dispersion is then atomized in a hot inert gas. The process of the invention is advantageously carried out in a spray dryer.Other References
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