Novel drug delivery device
Patent 3948254 Issued on April 6, 1976. Estimated Expiration Date: 
April 6, 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.
April 6, 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 2962023 3757798 3760805 3845770 3880991 3888975 InventorApplicationNo. 501207 filed on 08/28/1974US Classes:128/833, Intrauterine424/423, Surgical implant or material424/426, Errodable, resorbable, or dissolving424/432, IUD or ring424/434, Mucosal (e.g., nasal, etc.)424/435, Mouth424/436, Anal, rectal (e.g., suppositories, etc.)424/437, Otic424/449, Transdermal or percutaneous604/515, To or from the female reproductory tract604/516, To or from the intestines through nasal or esophagal conduit604/57Means for placing solid treating material in bodyExaminersPrimary: Trapp, Lawrence W.Attorney, Agent or FirmAbstractA drug delivery device for administering a drug at a controlled rate for a prolonged period of time to produce a local or systemic physiological or pharmacological effect is comprised of a wall surrounding a reservoir containing a drug. The reservoir is formed of a solid drug carrier permeable to the passage of the drug. The wall is formed in at least a part of a microporous material the pores of which contain a drug release rate controlling medium also permeable to the passage of the drug, but the rate of passage of the drug through the medium is lower than the rate passage of the drug through the solid drug carrier so that drug release by the medium in the microporous wall is the drug release rate controlling step for releasing drug from the drug delivery device. | |
