Multi-layer granule
Patent 4994279 Issued on February 19, 1991. Estimated Expiration Date: 
January 26, 2009. 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.
January 26, 2009. 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 T861008 2921883 2991226 3577512 3879511 Nitrofurantoin sustained release tablet Sustained release pharmaceutical composition Prolonged-release pharmaceutical compositions for oral administration, their methods of making and use Theophylline sustained release granule Sustained release pharmaceutical compositions InventorsApplicationNo. 302646 filed on 01/26/1989US Classes:424/494, Cellulose derivatives424/490, Coated (e.g., microcapsules)424/493, Containing polysaccharides (e.g., sugars)424/496, Containing natural gums/resins424/498Containing waxes, higher fatty acids, higher fatty alcohols, or derivatives thereofExaminersPrimary: Page, Thurman K.Attorney, Agent or FirmForeign Patent References
International ClassA61K 009/50Foreign Application Priority Data1988-02-03 JPAbstractA multi-layered granule comprises an inner, slow-releasing layer, an outer, rapid-releasing layer and an intermediate layer provided between said slow-releasing layer and said rapid-releasing layer which intermediate layer comprises a hardened oil and hydroxypropyl cellulose or methyl cellulose.Other References
| |
