The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 1993
Filed:
Aug. 13, 1991
Applicant:
Inventors:
Philip B Shepherd, Sedalia, CO (US);
Rick L Dolin, Littleton, CO (US);
Assignee:
Manville Corporation, Denver, CO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; C04B / ;
U.S. Cl.
CPC ...
156 41 ; 156 45 ; 156346 ; 106631 ; 106698 ;
Abstract
A lightweight wallboard having a density in the range of 10 pcf to 30 pcf and comprised of a faced layer of expanded siliceous inorganic particles, such as expanded perlite, bonded together by inorganic binder, such as sodium silicate. The board is made by depositing a mixture of particles, binder and water onto a moving web of facing material, contacting the mixture with an upper moving web of facing material, compacting the mixture to the desired shape and density and drying the resulting board. Fire resistant and water repellent versions of the formula are also disclosed.