Composite core coated microparticles and process of preparing same
Patent 4568559 Issued on February 4, 1986. Estimated Expiration Date: 
February 6, 2004. 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.
February 6, 2004. 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 3089824 3148123 3207824 3714065 3882228 Process of coating particles of less than 20 microns with a polymer coating Patent #: 3992558 InventorsAssigneeApplicationNo. 06/577079 filed on 02/06/1984US Classes:427/2.15, Fluidized bed utilized424/493, Containing polysaccharides (e.g., sugars)424/497, Containing solid synthetic polymers427/213, Fluidized bed utilized428/402.24Microcapsule with solid core (includes liposome)ExaminersPrimary: Kittle, John E.Assistant: Shah, Mukund J. Attorney, Agent or FirmInternational ClassesA61K 9/16 (20060101)A61K 9/50 (20060101) AbstractA process for preparing coated microparticles, which process comprises preparing a solvent solution of an active ingredient to be encapsulated and a film-forming polymer, removing the solvent to provide a dry, composite, uniform admixture of the active ingredient and the polymer material, reducing the composite admixture to a defined smaller particle size distribution, coating the reduced composite core particles in a fluidized bed, with a uniform defined wall thickness of the same or substantially the same film-forming polymer material to provide composite core coated microparticles. | |
