Patents by Inventor David A. Ruefenacht

David A. Ruefenacht has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Utilization of latexes with aluminous cement and gypsum composition
    Patent number: 4849018
    Abstract: This invention relates to improved aluminous cement/gypsum compositions that contain polymer latex emulsions or compounds to produce self-curing, crack-free, fast-setting, high early strength, high bonding, water resistant, durable, cementitious mixtures for finishing, coating, plastering, stucco, rigid insulation protection, topping, resurfacing, patching, mortaring, tile grouting, concrete, and the like. In addition, this invention discloses a method for improving the properties and performance of aluminous cement/gypsum compositions by adding certain types, amounts and/or combinations of polymer latex emulsions or compounds with or without the addition of wet expansion and drying shrinkage inhibitors.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: July 18, 1989
    Assignee: Construction Products Research, Inc.
    Inventors: Warner K. Babcock, David A. Ruefenacht
  • Utilization of latexes with hydraulic cement and gypsum compositions
    Patent number: 4746365
    Abstract: This invention relates to improved aluminous cement/gypsum compositions that contain polymer latex emulsions or compounds to produce self-curing, crack-free, fast-setting, high early strength, high bonding, water resistant, durable, cementitious mixtures for finishing, coating, plastering, stucco, rigid insulation protection, topping, resurfacing, patching, motaring, tile grouting, concrete, and the like. In addition, this invention discloses a method for improving the properties and performance of aluminous cement/gypsum compositions by adding certain types, amounts and/or combinations of polymer latex emulsions or compounds with or without the addition of wet expansion and drying shrinkage inhibitors.
    Type: Grant
    Filed: February 2, 1987
    Date of Patent: May 24, 1988
    Assignee: Construction Products Research, Inc.
    Inventors: Warner K. Babcock, David A. Ruefenacht