Oral drug preparations
Patent 3954959 Issued on May 4, 1976. Estimated Expiration Date: 
May 4, 1993. 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.
May 4, 1993. 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 2971889 3247066 3538214 3577512 3608063 3629393 3641237 3689634 3775537 InventorAssigneeApplicationNo. 608230 filed on 08/27/1975US Classes:424/497Containing solid synthetic polymersExaminersPrimary: Rose, Shep K.Attorney, Agent or FirmAbstractOral drug preparations are described, having a protracted effect and a suitable rate of release of the drug during its period of action, said preparations comprising a pharmaceutically active component to which has been admixed one or more buffers, and possibly other pharmaceutically acceptable adjuvants, the mixture having been shaped into small particles and subsequently been coated with a film-forming material allowing for diffusion of stomach juice and intestinal juice together with the drugs dissolved therein, but not being soluble in the said juices.Other References
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