Pharmaceutical delivery system
Patent 4687660 Issued on August 18, 1987. Estimated Expiration Date: 
August 18, 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.
August 18, 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 2011587 2987445 3538214 3773920 Osmotically driven active agent dispenser Tablets coated with aqueous resin dispersions Sustained release indomethacin Sustained release pharmaceutical compositions Water and drug delivery system for suppository use Osmotic drug delivery system InventorsApplicationNo. 06/640951 filed on 08/15/1984US Classes:424/465, With claimed perfecting feature in contents (e.g., excipient, lubricant, etc.)424/467, Printed, embossed, grooved, or perforated424/473With porous, perforated, apertured, or sieved layer (e.g., dialyzing layer, microporous layer, etc.)ExaminersPrimary: Griffin, Ronald W.Attorney, Agent or FirmInternational ClassesA61K 9/00 (20060101)A61K 9/28 (20060101) Foreign Application Priority Data1983-08-16 GBAbstractA composition for use in an aqueous environment which comprise a formulation containing a water-soluble pharmaceutically beneficial agent, a water-insoluble, water-permeable film coating surrounding the formulation, and particulate, water-soluble, pore-forming material dispersed within the film coating.Other References
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