Sustained release pharmaceutical compositions
Patent 4309405 Issued on January 5, 1982. Estimated Expiration Date: 
January 30, 2001. 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 30, 2001. 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 ReferencesInventorsAssigneeApplicationNo. 06/230156 filed on 01/30/1981US Classes:424/493, Containing polysaccharides (e.g., sugars)424/494Cellulose derivativesExaminersPrimary: Rose, Shep K.Attorney, Agent or FirmInternational ClassA61K 9/24 (20060101)AbstractNovel sustained release compositions comprising a core containing a drug, a seal coating surrounding the core and a sugar coating surround the seal coated core are disclosed.Other References
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