Semi-enteric drug delivery systems and methods for preparing same
Patent 5167964 Issued on December 1, 1992. Estimated Expiration Date: 
February 14, 2012. 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.
February 14, 2012. 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 ReferencesPharmaceutical preparation comprising a cardiac glycoside with a polymer coating Coating for pharmaceutical dosage forms Medicine based on fenofibrate, and a method of preparing it Sustained-release formulation and production thereof Patent #: 4828840 InventorsApplicationNo. 835798 filed on 02/14/1992US Classes:424/482, Containing solid synthetic polymers424/78.24, N-Vinyl-2-pyrrolidone424/440, Candy, candy coated or chewing gum424/441, Chewable tablet or wafer424/472, Layered unitary dosage forms424/480, Cellulose or derivative424/494, Cellulose derivatives424/495, Ethyl cellulose424/497Containing solid synthetic polymersExaminersPrimary: Page, Thurman K.Assistant: Hulina, Amy Attorney, Agent or FirmInternational ClassesA61K 009/32A61K 009/58 AbstractThe present invention pertains to semi-enteric drug delivery systems which comprise (a) an inert core, (b) a first coating layer over the core comprising a medicament, and (c) a second coating layer over the first coating layer comprising a mixture of methacrylic acid copolymer, type C, and povidone present in a ratio by weight of from about 2:1 to about 24:1, respectively. | |
