Microcapsules and method of preparing same
Patent 4462982 Issued on July 31, 1984. Estimated Expiration Date: 
September 17, 2002. 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.
September 17, 2002. 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 3485914 3909444 Microcapsules containing medicament-polymer salt having a water-insoluble polymer sheath, their production and their use Process for the preparation of pharmaceutical substance-containing microcapsules Controlled release tablet Granule having controlled release properties Patent #: 4341759 InventorsAssigneeApplicationNo. 06/419695 filed on 09/17/1982US Classes:424/495, Ethyl cellulose427/213.3, Solid encapsulation process utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)428/402.24Microcapsule with solid core (includes liposome)ExaminersPrimary: Lovering, Richard D.Assistant: Brookes, Anne Attorney, Agent or FirmInternational ClassesA61K 9/16 (20060101)A61K 9/50 (20060101) B01J 13/06 (20060101) B01J 13/08 (20060101) Foreign Application Priority Data1981-10-05 JPAbstractEthylcellulose microcapsules, wherein a polymer material which shows at least 1.2 times increase in weight by immersing it in water at 37° C. is incorporated into the ethylcellulose coating walls and/or the core material thereof, are disclosed. Said ethylcellulose microcapsules show rapid release of the core material in digestive organs such as stomach. | |
