Extended release form of diltiazem
Patent 5529791 Issued on June 25, 1996. Estimated Expiration Date: 
September 23, 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.
September 23, 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 ReferencesSustained release pharmaceutical composition of diltiazem Therapeutic compositions with controlled release of medicaments supported on crosslinked polymers and coated with polymer films, and their preparation process Patent #: 5275824 InventorsAssigneeApplicationNo. 311722 filed on 09/23/1994US Classes:424/494, Cellulose derivatives424/490, Coated (e.g., microcapsules)424/497, Containing solid synthetic polymers514/777, Carbohydrate or lignin, or derivative514/785, Carboxylic acid ester514/786, Glyceride514/970CONTAINING DESIGNATED INGREDIENT TO STABILIZE AN ACTIVE INGREDIENTExaminersPrimary: Page, Thurman K.Assistant: Spear, James M. Attorney, Agent or FirmInternational ClassesA61K 009/16A61K 009/58 A61K 009/62 AbstractAn extended-release galenical form of Diltiazem or a pharmaceutically acceptable salt thereof, which comprises beads containing said Diltiazem or a pharmaceutically acceptable salt thereof as an active ingredient and a wetting agent, said beads being coated with a microporous membrane comprising at least a water-soluble or water-dispersible polymer or copolymer and a pharmaceutically acceptable adjuvant.Field of SearchSustained or differential releaseContaining discrete coated particles pellets, granules, or beads Containing solid synthetic polymers Coated (e.g., microcapsules) Containing polysaccharides (e.g., sugars) Containing solid synthetic polymers Containing waxes, higher fatty acids, higher fatty alcohols, or derivatives thereof Contains proteins or derivative or polysaccharides or derivative Cellulose derivatives | |
