1
Dale R Greve, Turner W Richards: Fire door core. Georgia Pacific Corporation, John T Synnestvedt, Kenneth P Synnestvedt, June 26, 1979: US04159302 (111 worldwide citation)

A fire door core in which the major ingredient is expanded perlite and including, as minor ingredients, set gypsum, set hydraulic cement and an organic binder, and having a density of no greater than about 30 lbs. per cubic foot, and preferably including unexpanded vermiculite, clay, and fibrous rei ...


2
Turner W Richards, Hubert C Francis, George F Fowler: Fire-resistant gypsum building materials. G P Gypsum Corporation, Synnestvedt & Lechner, August 31, 1999: US05945208 (47 worldwide citation)

Fiberboards are provided containing at least about 65 wt. % calcium sulfate dihydrate derived from hemihydrate or anhydrous gypsum, and at least about 7 wt. % pulped paper fibers. The boards are capable of being formed into structural members having superior mechanical properties and/or fire resista ...


3
Turner W Richards, Hubert C Francis, George F Fowler Jr: Gypsum fiberboard door frame. Georgia Pacific Corporation, Synnestvedt & Lechner, September 20, 1994: US05347780 (45 worldwide citation)

A door frame having excellent fire-resistance, flexural strength and screw holding properties is fabricated from gypsum fiberboard, specifically a gypsum fiberboard having a density of at least 60 lbs./cu.ft., a flexural strength of at least about 30 lbs. (1/2" thick material), and a screw holding c ...


4
Dwight G Sellers, Franklin A Altman, Turner W Richards: Method of manufacturing a water-resistant gypsum composition. Georgia Pacific Corporation, Synnestvedt & Lechner, August 4, 1992: US05135805 (44 worldwide citation)

A method for incorporating siloxane into a water-resistant, gypsum-based article is disclosed, comprising, (A) adding said siloxane to water; (B) mixing said siloxane/water mixture with calcined gypsum to form an aqueous slurry; and (C) allowing said slurry to set to form a set gypsum-based, water-r ...


5
Turner W Richards, Hubert C Francis, George F Fowler: Fire-resistant structure containing gypsum fiberboard. Georgia Pacific Corporation, Synnestvedt & Lechner, April 26, 1994: US05305577 (39 worldwide citation)

Fire-resistant structures are provided having at least a 20 minute ASTM E-152 fire test rating. The structures include a core having a gypsum-containing composition and a density of at least about 60 lbs/ft, a flexural strength of at least 30 lbs (1/2 inch thick material), and a screw-holding capaci ...


6
Turner W Richards, Hubert C Francis, George F Fowler: Gypsum building product. Georgia Pacific Corporation, Synnestvedt & Lechner, December 15, 1992: US05171366 (38 worldwide citation)

Compositions containing nonfibrous calcium sulfate in hemi-hydrate or anhydrous form and fibrous additives, including paper fibers preferably derived from waste newspaper, capable of being formed into an unfaced building material having superior mechanical properties and/or fire resistance.


7
Turner W Richards, Hubert C Francis, George F Fowler, Dale R Greve, Edward M Rigby: Continuous processing equipment for making fiberboard. Georgia Pacific Corporation, Synnestvedt & Lechner, May 27, 1997: US05632848 (33 worldwide citation)

A continuous manufacturing line for preparing gypsum fiberboard is provided. The manufacturing line includes equipment for admixing hydratable gypsum, paper, and a quantity of water to form a substantially homogenous slurry, dewatering apparatus for removing a portion of the excess water from the sl ...


8
Turner W Richards, Hubert C Francis, George F Fowler: Firedoor constructions including gypsum building product. Georgia Pacific Corporation, Synnestvedt & Lechner, October 20, 1992: US05155959 (33 worldwide citation)

Firedoor constructions manufactured from board compositions containing calcium sulfate in hemi-hydrate or anhydrous form and fibrous additives, including pulped paper fibers preferably derived from waste newspaper, capable of being formed into firedoor members having superior mechanical properties a ...


9
Turner W Richards, Hubert C Francis, George F Fowler: Fire-resistant gypsum fiberboard. Georgia Pacific Gypsum Corporation, Banner & Witcoff, October 9, 2001: US06299970 (22 worldwide citation)

Fiberboards are provided containing at least about 65 wt. % calcium sulfate dihydrate derived from hemihydrate or anhydrous gypsum, and at least about 7 wt. % pulped paper fibers. The boards are capable of being formed into structural members having superior mechanical properties and/or fire resista ...


10
Turner W Richards, Hubert C Francis, George F Fowler: Methods of preparing fire doors. Georgia Pacific Corporation, Synnestvedt & Lechner, August 25, 1998: US05798010 (17 worldwide citation)

Fiberboards are provided containing at least about 65 wt. % calcium sulfate dihydrate derived from hemihydrate or anhydrous gypsum, and at least about 7 wt. % pulped paper fibers. The boards are capable of being formed into structural members having superior mechanical properties and/or fire resista ...



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