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:
Mar. 14, 1989
Filed:
Oct. 20, 1987
Applicant:
Inventors:
Charles W Lehnert, Stone Mountain, GA (US);
George F Fowler, Jr, Norcross, GA (US);
Assignee:
Georgia-Pacific Corporation, Atlanta, GA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E06B / ;
U.S. Cl.
CPC ...
52455 ; 52232 ; 52794 ; 428 70 ; 428703 ;
Abstract
A fire-resistant door comprises a core panel of mineral material, such as gypsum wallboard. A fiber mat, preferably comprising glass fibers, is at least partially embedded in each face of said core panel. An edge banding assembly disposed around the periphery of the core panel is centrally grooved to receive the panel edges. Facing sheets are affixed to the opposite sides of the edge banding assembly in spaced parallel relation to the core panel, and a spacer material at least partially fills the spaces between the facing sheets and the core panel.