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United States of America Patent
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Issued Date -
Aug 24, 2006
app pub date -
Jan 17, 2006
filing date -
Jan 17, 2005
priority date (Note) -
Abandoned
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Abstract
A process for the preparation of coated polymer particles containing superparamagnetic crystals, said process comprising reacting surface-functionalized, superparamagnetic crystal-containing polymer particles of diameter less than 0.5 .mu.m with at least one polyisocyanate and at least one diol.
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