Method and composition for the preparation of controlled long-acting pharmaceuticals for oral administration
Patent 4680323 Issued on July 14, 1987. Estimated Expiration Date: 
July 14, 2004. 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.
July 14, 2004. 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 2887440 3065143 3138524 3428728 3590117 3870790 3876771 Sustained release therapeutic compositions Method and composition for the preparation of controlled long-acting pharmaceuticals Slow-releasing medical preparation to be administered by adhering to a wet mucous surface InventorApplicationNo. 06/556844 filed on 12/01/1983US Classes:524/43, Hydroxyalkyl424/435, Mouth514/781, Cellulose or derivative514/965Discrete particles in supporting matrixExaminersPrimary: Griffin, Ronald W.Attorney, Agent or FirmInternational ClassesA61K 9/20 (20060101)A61K 9/00 (20060101) A61K 9/02 (20060101) AbstractA novel pharmaceutical composition is disclosed. It comprises a sustained release pharmaceutical carrier suitable for admixture with active ingredients comprising:(a) 5.5-98.5% by weight of hydroxypropyl methylcellulose;(b) 0.25-4.5% by wieght of hydroxypropyl cellulose;(c) 1-90% by weight of a carboxyvinyl polymer. | |
