Drainage mat
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United States of America Patent
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Feb 11, 2014
Grant Date -
Jul 19, 2012
app pub date -
Jan 17, 2011
filing date -
Jan 17, 2011
priority date (Note) -
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Abstract
A drainage mat for use in building structures, particularly in exterior walls and roofing, to improve drainage and ventilation within such structures. The drainage mat includes a web of extruded polymer monofilaments that are heat welded at junctions to form a matrix of tangled monofilaments. The web has a uniform thickness and includes alternating rows of high filament density and low filament density.
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