PEG-polyacetal and PEG-polyacetal-POE graft copolymers and pharmaceutical compositions
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United States of America Patent
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Issued Date -
Oct 19, 2006
app pub date -
Mar 28, 2006
filing date -
Mar 31, 2005
priority date (Note) -
Abandoned
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Abstract
The present invention provides graft copolymer delivery vehicle which comprises a polyethyleneglycol (PEG)-polyacetal (PA) copolymer or a polyethyleneglycol (PEG)-polyacetal (PA)-polyorthoester (POE) copolymer. The polyethyleneglycol-polyacetal graft copolymers or the polyethyleneglycol-polyacetal-polyorthoester graft copolymers, in particular, the PA-g-PEG or the PA-POE-g-PEG suitable for the invention are represented by Formulae I and V:
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