Microwave cooking packages and methods of making thereof
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United States of America Patent
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May 14, 2013
Grant Date -
Apr 3, 2008
app pub date -
Oct 31, 2007
filing date -
Feb 9, 2004
priority date (Note) -
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Abstract
A microwave insulating material includes a dimensionally stable support, a patterned adhesive layer overlying at least a portion of the support, a polymer film layer overlying the patterned adhesive layer, and a plurality of expandable cells disposed between the support and the polymer film layer and defined by the patterned adhesive layer, wherein the expandable cells vary in size. A self-sealing microwave package includes a sheet of insulating material including a first surface, and a thermally activatable adhesive applied to at least a portion of the first surface.
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