Process for preparing ethylcellulose microcapsules
Patent 4411933 Issued on October 25, 1983. Estimated Expiration Date: 
April 9, 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.
April 9, 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 3155590 3341416 3415758 3531418 Preparation of microcapsules Process for the preparation of pharmaceutical substance-containing microcapsules Method of producing delayed release of sodium fluoride Patent #: 4220552 InventorsAssigneeApplicationNo. 06/252457 filed on 04/09/1981US Classes:427/213.3, Solid encapsulation process utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)264/4.1, Liquid encapsulation utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)424/495, Ethyl cellulose428/402.24, Microcapsule with solid core (includes liposome)504/359, Microencapsulating or encapsulating agent71/64.11Controlled releaseExaminersPrimary: Lovering, Richard D.Attorney, Agent or FirmInternational ClassesA61K 9/50 (20060101)B01J 13/06 (20060101) B01J 13/10 (20060101) Foreign Application Priority Data1980-04-25 JPAbstractA process for preparing ethylcellulose microcapsules by flocculation of the ethylcellulose is disclosed. In this process, the flocculation of the ethylcellulose is carried out in the presence of an organosilicon polymer or in the presence of said organosilicon polymer and a surfactant. | |
