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US Patent 7875358 Slurry and acoustical panel with reduced bound water

Patent 7875358 was granted and assigned to USG Interiors Inc on January, 2011 by the United States Patent and Trademark Office.

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Current Assignee

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Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Daniel E. Boss1

Mark H. Englert1

Date of Patent

January 25, 2011

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Patent Application Number

118255551

Date Filed

July 6, 2007

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Patent Citations Received

US Patent 11773020 Gypsum composition comprising uncooked starch having mid-range viscosity, and methods and products related thereto

Patent Primary Examiner

1

Patent abstract

A composition for a slurry for manufacture of a building panel includes one or more fillers, one or more binders and water. One or more fillers is an expanded perlite at least partially covered with a film-forming, thermoplastic polymer coating Some embodiments use calcined or uncalcined gypsum as a binder or filler. One embodiment is a building panel that includes a solid matrix of calcium sulfate dihydrate crystals bound to expanded perlite.

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