Multiwall sheet, an article, a method of making a multiwall...

Details Multiwall sheet, an article, a method of making a multiwall... Multiwall sheet, an article, a method of making a multiwall...

2008-11-25

2011-10-25

Loney, Donald J (Department: 1783)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

C428S178000, C428S188000, C428S913000, C264S177100, C264S209100, C264S328100, C156S109000, C052S786110, C052S793100

Reexamination Certificate

active

08043688

ABSTRACT:
In one embodiment, a multiwall sheet comprises a first sheet comprising an inner surface and an outer surface, a second sheet comprising a first surface and a second surface; and a rib disposed between the inner surface and the first surface. The outer layer can have surface features and has a surface area of greater than or equal to 140% of a planar, flat, non-profiled surface area for a same unit area.

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