Sustained release drug delivery system suitable for oral administration
Patent 5885616 Issued on March 23, 1999. Estimated Expiration Date: 
August 18, 2017. 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, 2017. 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 ReferencesControlled absorption diltiazem formulation for once-daily administration Controlled release formulation for pharmaceutical compounds Diltiazem formulation Multilayered controlled release pharmaceutical dosage form Patent #: 5474786 InventorsApplicationNo. 912722 filed on 08/18/1997US Classes:424/472, Layered unitary dosage forms424/461, Containing polysaccharide (e.g., cellulose sugars, etc.)424/490, Coated (e.g., microcapsules)424/494, Cellulose derivatives424/495, Ethyl cellulose424/497Containing solid synthetic polymersExaminersPrimary: Page, Thurman K.Assistant: Seidleck, Brian K. Attorney, Agent or FirmInternational ClassA61K 009/24AbstractA single bead drug delivery system suitable for oral administration with multiply layered drug and polymer compartments can provide a two-step release of active agent to facilitate an immediate yet sustained drug delivery over a 24 hour period following oral administration with minimized variance between peak and trough levels of therapeutic drug amounts.Other References
| |
