Perforated board formed from cementitious material and process and system for producing same
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United States of America Patent
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Issued Date -
Jun 21, 2007
app pub date -
Dec 21, 2005
filing date -
Dec 21, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A process for producing a perforated board comprising a cementitious layer and first and second facers is provided, the process comprising: (a) providing a substrate comprising a first facer; (b) applying a slurry comprising a cementitious material on the substrate; (c) providing a second facer above the slurry; and (d) forming a plurality of perforations which extends at least partially into at least one of the first and second facers.
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