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Class Information
Number: 156/43
Name: Adhesive bonding and miscellaneous chemical manufacture > Methods > Plaster board making > Pore forming in situ
Description: Processes which include the step of causing the core material to become cellular in nature after association of the core material with at least one of the facing sheets.

Patents under this class:

Patent Number Title Of Patent Date Issued
8702881 Method of making lightweight, reduced density fire rated gypsum panels Apr. 22, 2014
8685188 Apparatus and method for fractionating gypsum slurry and method of producing gypsum board Apr. 1, 2014
8016961 Gypsum wallboard and method of making same Sep. 13, 2011
7819993 Method for producing light gypsum board Oct. 26, 2010
7776170 Fire-resistant gypsum panel Aug. 17, 2010
7718019 Methods of and systems for preparing a heat resistant accelerant slurry and adding the accelerant slurry to a post-mixer aqueous dispersion of calcined gypsum May. 18, 2010
7686902 Method of fabricating plaster board Mar. 30, 2010
7470338 Process for forming dense layers in a gypsum slurry Dec. 30, 2008
6994769 In-situ cleaning of a polymer coated plasma processing chamber Feb. 7, 2006
6716293 Wallboard with fly ash Apr. 6, 2004
6706128 Method of providing void space in gypsum wallboard and in a gypsum core composition Mar. 16, 2004
6689238 Labelling system Feb. 10, 2004
6682617 Method for making wallboard or backerboard sheets including aerated concrete Jan. 27, 2004
6632550 Gypsum-containing product having increased resistance to permanent deformation and method and composition for producing it Oct. 14, 2003
6541528 Flexible polymer foams, their production and use Apr. 1, 2003
6488792 Method and apparatus for manufacturing cementitious panel with reinforced longitudinal edge Dec. 3, 2002
6464880 Microporous ionomeric materials and methods of preparation Oct. 15, 2002
6409855 Method for making wallboard or backerboard sheets including aerated concrete Jun. 25, 2002
6395113 Process for producing a non-combustible moulded article, especially a building panel May. 28, 2002
6342284 Gypsum-containing product having increased resistance to permanent deformation and method and composition for producing it Jan. 29, 2002
5985061 Inorganic board and a method of manufacturing said inorganic board Nov. 16, 1999
5962119 Gypsum wallboard and process of making same Oct. 5, 1999
5922447 Lightweight gypsum board Jul. 13, 1999
5908521 Method of manufacturing multilayer plasterboard Jun. 1, 1999
5879486 Methods of manufacturing gypsum board and board made therefrom Mar. 9, 1999
5804003 Method of manufacturing an inorganic board Sep. 8, 1998
5714032 Method of manufacturing multilayer plasterboard and apparatus therefor Feb. 3, 1998
5714001 Foaming agent composition and process Feb. 3, 1998
5643510 Producing foamed gypsum board using a foaming agent blend Jul. 1, 1997
5391245 Fire-resistant building component Feb. 21, 1995
5264057 Process for the production of a flame resistant to nonflammable composite panel and apparatus for carrying out the process Nov. 23, 1993
5158612 Foaming agent composition and process Oct. 27, 1992
5135805 Method of manufacturing a water-resistant gypsum composition Aug. 4, 1992
5085929 Gypsum board Feb. 4, 1992
5015450 Process for making calcium sulfate alpha-hemihydrate from calcium sulfate dihydrate May. 14, 1991
5015449 Process for making construction grade calcium sulfate alpha-hemihydrate from moist finely divided gypsum obtained from a power plant flue gas desulfurization May. 14, 1991
4678515 Foam generating compositions Jul. 7, 1987
4676835 Foam generating compositions Jun. 30, 1987
4643771 Production of water-repellent moldings from plaster Feb. 17, 1987
4618370 Foam generating compositions Oct. 21, 1986
4614553 Method of manufacturing acoustic panels for controlling reverberation of sound in enclosed environments Sep. 30, 1986
4518652 Method for forming a lightweight cementitious structural product and product formed thereby May. 21, 1985
4327146 High density interface gypsum board and method for making same Apr. 27, 1982
4303722 Building components Dec. 1, 1981
4238546 Lightweight gypsum products and methods of making same Dec. 9, 1980
4156615 Foaming agents for gypsum board manufacture May. 29, 1979
4057443 Foamed gypsum wallboard Nov. 8, 1977

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