Microparticles useful as ultrasonic contrast agents
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United States of America Patent
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Feb 27, 2001
Grant Date -
N/A
app pub date -
Apr 30, 1998
filing date -
Apr 30, 1997
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Microparticles are provided comprising a shell of an outer layer of a biologically compatible material and an inner layer of biodegradable polymer. The core of the microparticles contain a gas, liquid or solid for use in drug delivery or as a contrast agent for ultrasonic contrast imaging. The microparticles are capable of passing through the capillary systems of a subject.
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