Patents by Inventor Robert U. Ludwig

Robert U. Ludwig 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).

  • Water based hardboard coating compositions of an acrylic ester interpolymer latex, a vinyl chloride polymer latex, a water reducible thermoset resin, and pigment(s)
    Patent number: 4007147
    Abstract: A water-based coating composition comprising (1) a low soap level acrylic ester interpolymer latex, (2) a fatty acid soap emulsified vinyl chloride polymer latex having substantially uniform particle size, (3) a water reducible thermoset resin, and (4) pigment(s) in an about 5% to about 60% pigment volume concentration, is an improved coating composition for hardboard.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: February 8, 1977
    Assignee: The B. F. Goodrich Company
    Inventors: Edward J. Leeson, Robert U. Ludwig
  • Stable acrylic ester latex coating compositions
    Patent number: 3996177
    Abstract: Acrylic ester polymers having reactive functional groups are admixed in latex form with a combination of a melamine-formaldehyde and a urea-formaldehyde thermoset resin to provide stable latex coating compositions. The compositions provide upon cure water and chemical resistant coatings for hardboard and other surfaces.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: December 7, 1976
    Assignee: The B. F. Goodrich Company
    Inventor: Robert U. Ludwig