Controlled release formulations containing zidovudine
Patent 4917900 Issued on April 17, 1990. Estimated Expiration Date: 
March 25, 2008. 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.
March 25, 2008. 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 ReferencesTreatment of human viral infections Patent #: 4724232 InventorsApplicationNo. 173261 filed on 03/25/1988US Classes:424/493, Containing polysaccharides (e.g., sugars)424/490, Coated (e.g., microcapsules)424/492, Gelatin424/494, Cellulose derivatives424/495, Ethyl cellulose424/497Containing solid synthetic polymersExaminersPrimary: Page, Thurman K.Attorney, Agent or FirmForeign Patent References
International ClassA61K 009/16Foreign Application Priority Data1987-03-27 GBAbstractThe invention relates to pharmaceutical formulations comprising discrete units of zidovudine provided with a controlled release coating in which the said units are preferably in the form of spheroids.Other References
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