Method of preparing gas-filled polymer matrix microparticles useful for delivering drug
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United States of America Patent
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Issued Date -
Sep 23, 2004
app pub date -
Mar 18, 2003
filing date -
Mar 18, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method is provided to prepare drug containing gas-filled porous microparticles having a polymer matrix interior which are useful for ultrasound mediated targeted delivery of a drug. An oil-in-water suspension is formed, both phases are frozen, then the aqueous and nonaqueous frozen phases are removed by sublimation.
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