Georgia-pacific Corporation

Ray W Hinkel

Charles W Lehnert

Brian G Randall

George F Fowler

James R Van Dyke

Glass mat-faced gypsum boards having a set core containing gypsum dihydrate and at least a minimum amount of chopped fibers, as well as other optional fire-resistant additives, are provided. The resulting boards obtain superior fire resistance properties over conventional paper-faced boards of like thickness which include a similar amount of chopped glass fibers.

Use of fibrous mat-faced gypsum board in shaft wall assemblies and

A fire door comprising a core and edge banding, the principal ingredients of the core being expanded perlite, gypsum and cement, the edge banding comprising a strip of natural wood, a strip of a cast mixture of which the principal ingredient is gypsum and an intervening strip of plastic laminate.

Growing community of inventors

Stone Mountain, GA, United States of America

Ray W Hinkel