Controlled release-initiation and controlled release-rate pharmaceutical composition
Patent 5496561 Issued on March 5, 1996. Estimated Expiration Date: 
August 24, 2014. 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 24, 2014. 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 ReferencesNovel galenic forms of verapamil, their preparation and medicines containing said novel galenic forms Process for forming a coated active agent-containing article Aqueous dispersion of enteric polymers and a method for producing the same Patent #: 5346542 InventorsAssigneeApplicationNo. 294052 filed on 08/24/1994US Classes:424/480, Cellulose or derivative424/461, Containing polysaccharide (e.g., cellulose sugars, etc.)424/462, Containing solid synthetic polymers424/482, Containing solid synthetic polymers424/494, Cellulose derivatives424/495, Ethyl cellulose424/497Containing solid synthetic polymersExaminersPrimary: Page, Thurman K.Assistant: Spear, James M. Attorney, Agent or FirmForeign Patent References
International ClassesA61K 009/24A61K 009/32 Foreign Application Priority Data1993-08-25 JPAbstractA controlled release-initiation and controlled release-rate pharmaceutical composition in which a drug-containing composition is coated with a membrane layer comprising a water insoluble high polymer and silicone. The starting time for the release of drugs from the controlled release-initiation and controlled release-rate pharmaceutical composition of this invention and the drug-releasing rate thereafter can be controlled at will. | |
