Stock material or miscellaneous articles – Sheets or webs edge spliced or joined
Reexamination Certificate
2004-12-30
2010-06-08
O'Hern, Brent T (Department: 1794)
Stock material or miscellaneous articles
Sheets or webs edge spliced or joined
C106S672000, C428S058000, C428S060000, C428S192000
Reexamination Certificate
active
07732032
ABSTRACT:
Lightweight, fiber reinforced, cementitious panels possessing exceptional toughness for use as building components in applications such as roofing elements, siding elements, framing and sheathing elements, and substrate elements for installation of floor finishes in residential and other building construction types. The panels employ a continuous phase resulting from the curing of an aqueous mixture of inorganic binder, PVA fibers and lightweight filler. The inorganic binder may be, for example, hydraulic cement alone, or a combination of hydraulic cement and pozzolan/s, or a combination of hydraulic cement, alpha hemihydrate, active pozzolan and optionally lime. The PVA fibers reinforce the continuous phase and are randomly distributed throughout the composite. Typical panels of the invention have a density of 60-85 pcf.
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Novak Druce & Quigg LLP
O'Hern Brent T
United States Gypsum Company
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