Composition comprising low density microspheres
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United States of America Patent
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Mar 18, 2008
Grant Date -
Feb 16, 2006
app pub date -
Oct 18, 2005
filing date -
Apr 5, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Low density microspheres, methods for preparing same, and use of same as contrast agents are described. The microspheres have a void which contains a gas or the vapor of a volatile liquid selected from the group consisting of aliphatic hydrocarbons, chlorofluorocarbons, tetraalkyl silanes and perfluorocarbons.
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