Polymeric antioxidants
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United States of America Patent
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Oct 13, 2009
Grant Date -
Feb 9, 2006
app pub date -
Sep 26, 2005
filing date -
Apr 5, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The following is an examiner's statement of reasons for allowance: an antioxidant polymer and method of preparing, the antioxidant comprising repeat units that include one or both of Structural Formulas (I) and (II) wherein R is —H or a substituted or unsubstituted alkyl, acyl or aryl group; Ring A is substituted with at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group; Ring B is substituted with at least one —H and at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group is not taught nor fairly suggested by the prior art or any combination thereof.
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