Dosage form providing immediate therapy followed by prolonged therapy
May 1, 2011. 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 3870790 Sustained release tablet formulations Novel sustained release tablet formulations Sustained release therapeutic compositions Method and composition for the preparation of controlled long-acting pharmaceuticals Carrier base material for prolonged release therapeutic compositions Prolonged release therapeutic compositions based on hydroxypropylmethylcellulose Sustained release therapeutic compositions based on high molecular weight hydroxypropylmethylcellulose Prolonged release drug dosage forms based on modified low viscosity grade hydroxypropylmethylcellulose Controlled release naproxen and naproxen sodium tablets InventorsApplicationNo. 694173 filed on 05/01/1991US Classes:424/473, With porous, perforated, apertured, or sieved layer (e.g., dialyzing layer, microporous layer, etc.)424/468, Sustained or differential release type424/472Layered unitary dosage formsExaminersPrimary: Page, Thurman K.Assistant: Horne, Leon R. Attorney, Agent or FirmInternational ClassA61K 009/24AbstractA dosage form is disclosed comprising a first layer and a second layer. The first layer provides immediate therapy and comprises a drug stereoisomer and the second layer provides prolonged therapy and comprises a drug racemate. | |
