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Class Information
Number: 156/41
Name: Adhesive bonding and miscellaneous chemical manufacture > Methods > Plaster board making > With water-proofing with added material
Description: Processes which include the step of coating a facing sheet of, the assembled body, or adding an ingredient to the core material which coating or added ingredient renders the plasterboard impervious to the passage of water.










Patents under this class:

Patent Number Title Of Patent Date Issued
8568544 Water resistant cementitious article and method for preparing same Oct. 29, 2013
8070895 Water resistant cementitious article and method for preparing same Dec. 6, 2011
8062478 Gypsum wood fiber articles and methods of making same Nov. 22, 2011
7846553 Gypsum board coating, gypsum board and cardboard-coated gypsum board production method Dec. 7, 2010
7776170 Fire-resistant gypsum panel Aug. 17, 2010
7435369 Method for targeted delivery of additives to varying layers in gypsum panels Oct. 14, 2008
7413603 Fiberboard with improved water resistance Aug. 19, 2008
7172403 Apparatus for preparing a gypsum wallboard core Feb. 6, 2007
6878321 Method of manufacture of glass reinforced gypsum board and apparatus therefor Apr. 12, 2005
6569541 Plaster-based prefabricated structural element exhibiting water resistance May. 27, 2003
6547901 Reinforced plasterboard Apr. 15, 2003
6165261 Water-resistant gypsum composition Dec. 26, 2000
6106607 Composition for hydrophobing gypsum and methods for the preparation and use thereof Aug. 22, 2000
5695553 Wax-based emulsions and their use in gypsum products Dec. 9, 1997
5618627 Water-repellent wallboard Apr. 8, 1997
5520779 Process and apparatus for producing fiber-reinforced plaster plates May. 28, 1996
5437722 Water-resistant gypsum compositions and emulsion for making same Aug. 1, 1995
5264057 Process for the production of a flame resistant to nonflammable composite panel and apparatus for carrying out the process Nov. 23, 1993
5256222 Lightweight building material board Oct. 26, 1993
5135805 Method of manufacturing a water-resistant gypsum composition Aug. 4, 1992
4948647 Gypsum backer board Aug. 14, 1990
4810569 Fibrous mat-faced gypsum board Mar. 7, 1989
4643771 Production of water-repellent moldings from plaster Feb. 17, 1987
4533434 Process for sizing paper and process for making plasterboard base paper sized thereby Aug. 6, 1985
4518652 Method for forming a lightweight cementitious structural product and product formed thereby May. 21, 1985
4470877 Paper having calcium sulfate mineral filler for use in the production of gypsum wallboard Sep. 11, 1984
4447498 Use of organopolysiloxanes in the manufacture of paper-coated plaster boards May. 8, 1984
4421704 Method of treatment for plaster articles to improve wear and water resistance and article of manufacture Dec. 20, 1983
4406738 Use of an organopolysiloxane preparation for the treatment of paper for the production of plaster boards Sep. 27, 1983
4336294 Coated boards of wooden material in particular for use in furniture Jun. 22, 1982
3935021 Water-resistant gypsum products Jan. 27, 1976











 
 
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