发明名称 |
Device for delivery of useful agent |
摘要 |
A device for the controlled continuous administration of an active agent to an environment of use is disclosed. The device comprises a body of erodible agent release rate controlling material containing an agent dispersed therethrough; the rate controlling material is a hydrophobic poly(carboxylic acid) having one ionizable carboxylic hydrogen for each 8 to 12 carbon atoms, which material erodes at a controlled and continuous rate over a prolonged period of time in response to the environment by a process of carboxylic hydrogen ionization, thereby releasing the dispersed agent at a controlled rate over a prolonged period of time.
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申请公布号 |
US4014987(A) |
申请公布日期 |
1977.03.29 |
申请号 |
US19750591443 |
申请日期 |
1975.06.30 |
申请人 |
ALZA CORPORATION |
发明人 |
HELLER, JORGE;BAKER, RICHARD W. |
分类号 |
A61K9/00;(IPC1-7):A61K47/00;A61K9/02 |
主分类号 |
A61K9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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