Moisture barrier underlayment with intermediate layer to...

Static structures (e.g. – buildings) – Underlying compressible layer or pad

Reexamination Certificate

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C052S409000, C052S573100

Reexamination Certificate

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07827751

ABSTRACT:
A sound and/or moisture barrier underlayment suited for use on a roof or floor surface to provide a substantially flat and level surface, comprises at least first and second strips of insulation membranes (10) laid down one next to the other in a coplanar relationship. The first and second strips (24, 26) have a thickness W1. An overlap joint (28) is provided between the first and second strips (24, 26). The overlap joint (28) has a thickness W2substantially equal to or less than W1to provide a free-bump transition between the first and second strips (24, 26) while preventing straight-through infiltration.

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patent: 2872882 (1959-02-01), Paul
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patent: 4471012 (1984-09-01), Maxwell
patent: 5968630 (1999-10-01), Foster
patent: 6189279 (2001-02-01), Fiechtl
patent: 7146771 (2006-12-01), Swann
patent: 2004/0031225 (2004-02-01), Fowler

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