| 发明名称 |
Asymmetric microporous beads for controlled release |
| 摘要 |
A durable and sprayable controlled release bead of active ingredient in the pores of a polymeric micro-porous bead having an anisotropic pore structure of large pores in the interior and small pores at the surface, the gradation of pore sizes between the interior and the surface being continuous.
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| 申请公布号 |
US5888930(A) |
申请公布日期 |
1999.03.30 |
| 申请号 |
US19970828825 |
申请日期 |
1997.03.13 |
| 申请人 |
BEND RESEARCH, INC. |
发明人 |
SMITH, KELLY L.;HOLMES, MATTHEW F.;BROOKE, JAMES W. |
| 分类号 |
A01N25/12;A01N25/18;A61K9/16;(IPC1-7):A01N25/34;A61K9/52 |
主分类号 |
A01N25/12 |
| 代理机构 |
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