Patents by Inventor Walter Verdyck

Walter Verdyck 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).

  • Method for preparing an aluminium foil for use as a support in lithographic printing plates
    Patent number: 5633115
    Abstract: The present invention provides a method for preparing an image receiving element comprising an aluminum foil as support comprising the steps of roughening and anodizing said aluminum foil and applying an image receiving layer containing physical development nuclei on said aluminum foil characterized in that said roughened and anodized aluminum foil is posttreated with an aqueous solution containing one or more organic compounds having at least one cationic group.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: May 27, 1997
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Nikolaas de Jaeger, Walter Verdyck, Augustin Meisters
  • Stabilization of dispersions of metal oxides and/or carbon black in water
    Patent number: 5292591
    Abstract: According to the present invention a dispersant is provided for stabilizing dispersions of metal oxides and/or carbon black in water in the presence of a hydrophilic binder. Said dispersant is a block-copolymer comprising at least one block of an ammonium group containing (meth)acrylate.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: March 8, 1994
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Philippe J. Teyssie, Luc E. Leemans, Walter A. Verdyck, Nikolaas C. de Jaeger
  • Stabilization of dispersions of metal oxides and/or carbon black in water
    Patent number: 5200456
    Abstract: According to the present invention a dispersant is provided for stabilizing dispersions of metal oxides and/or carbon black in water in the presence of a hydrophilic binder. Said dispersant is a block-copolymer comprising at least one block of an ammonium group containing (meth)acrylate.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: April 6, 1993
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Philippe J. Teyssie, Luc E. Leemans, Walter A. Verdyck, Nikolaas C. de Jaeger