Controlled release formulation
Patent 4792452 Issued on December 20, 1988. Estimated Expiration Date: 
July 28, 2007. 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 28, 2007. 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 release formulation Patent #: 4610870 InventorsAssigneeApplicationNo. 07/078505 filed on 07/28/1987US Classes:424/475, Organic coatings424/468, Sustained or differential release type424/479, Containing polysaccharide (e.g., sugar, etc.)424/480, Cellulose or derivative424/482, Containing solid synthetic polymers514/54PolysaccharideExaminersPrimary: Dixon, William R. Jr.Assistant: Green, Anthony Attorney, Agent or FirmInternational ClassA61K 9/20 (20060101)AbstractA controlled release pharmaceutical formulation is provided which releases a pharmaceutical of a basic character at a controlled rate regardless of the pH of the environment, which formulation includes a basic pharmaceutical, up to about 45% by weight of a pH dependent polymer which is a salt of alginic acid, such as sodium alginate, up to about 35% by weight of a pH-independent hydrocarbon gelling agent having a viscosity of up to about 100,000 centipoises in 2% solution at 20° C., binder and excipients.Other References
| |
