Orally administerable sustained release pharmaceutical formulations
Patent 4847092 Issued on July 11, 1989. Estimated Expiration Date: 
August 19, 2008. 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.
August 19, 2008. 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.InventorsAssigneeApplicationNo. 07/233771 filed on 08/19/1988US Classes:424/456, Gelatin424/457Sustained or differential releaseExaminersPrimary: Page, Thurman K.Assistant: Horne, Leon R. Attorney, Agent or FirmInternational ClassA61K 9/48 (20060101)AbstractThis invention provides orally administerable pharmaceutical formulations having a semi-solid matrix containing a hydrophilic substance capable of creating channels in a hydrophobic carrier matrix thereby providing a sustained rate of release of an active agent from the formulation.Other References
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