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:
Jul. 05, 1977
Filed:
Oct. 31, 1975
Applicant:
Inventor:
Frank L Shiflet, Waynesboro, VA (US);
Assignee:
Hopeman Brothers, Inc., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E04B / ; E04B / ;
U.S. Cl.
CPC ...
52573 ; 52127 ; 52459 ;
Abstract
A wallboard composed of a low-strength core of gypsum or the like can be successfully faced with a decorative plastic such as melamine if plastic is used on both sides, and a sheet of steel foil is located on both sides of the core between the core and the facing material. The use of steel foil greatly reduces the likelihood that low humidity will cause the gypsum core to split as a result of shrinkage of the facing material, and the provision of plastic on both sides of the core balances the wallboard eliminating any tendency to bow.