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:
Feb. 25, 2003
Filed:
Jun. 06, 2001
Robert J. Hauber, Lutz, FL (US);
Christopher J. Sanders, Safety Harbor, FL (US);
Mark E. Hennis, Indian Rocks Beach, FL (US);
Michael P. Fahey, St. Petersburg, FL (US);
BPB, plc, Slough, GB;
Abstract
A multilayer gypsum board having face sheets comprising inorganic fiber, preferably randomly oriented glass fiber, which have been completely impregnated with a gypsum slurry so as to penetrate through the random interstices between the inorganic fibers and to thereby coat the board surfaces with gypsum slurry. The multilayer gypsum board may have a polymeric compound added to unset gypsum the compound may comprise any of the following: polyacrylamide, polymethylacrylamide, polyvinyidene chloride (PVDC), polyamide, poly (hexamethylene adipamide), polyvinylchloride (PVC), polyethylene, cellulose acetate, polyisobutylene, polycarbonate, polypropylene, polystyrene, polychloroprene, styrene, butadiene, natural rubber, poly (2,6 dimethyl pentene oxide), poly (4-methyl-1-pentene) and polydimethyl siloxane. The multilayer gypsum board may comprise a first layer of a mixture of set gypsum having an outer surface and the polymeric compound additive entrained within the set gypsum and being impregnated in a thin sheet of randomly aligned inorganic fibers so as to essentially encase the core gypsum within two facing layers having a combination set gypsum and polymeric compound.