Water and drug delivery system for suppository use
Patent 4439194 Issued on March 27, 1984. Estimated Expiration Date: 
September 8, 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.
September 8, 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 1573976 1812769 2110962 3490454 3521637 3845770 Drug delivery device Osmotic device having microporous reservoir Osmotic system having laminated wall comprising semipermeable lamina and microporous lamina Patent #: 4160452 InventorsAssigneeApplicationNo. 06/300370 filed on 09/08/1981US Classes:424/436Anal, rectal (e.g., suppositories, etc.)ExaminersPrimary: Rosenbaum, C. FredAssistant: Wallen, T. J. Attorney, Agent or FirmInternational ClassesA61K 9/02 (20060101)A61M 31/00 (20060101) AbstractA drug delivery system designed to deliver water and drug to the site of administration is composed of a core of an aqueous solubulizing system in a wax housing, which melts at body temperature, surrounded by a matrix of drug and water-dispersible excipients. The entire unit may also be coated with a semi-permeable membrane to modulate drug release.Other References
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