Patents by Inventor Andre H. Van Waveren

Andre H. Van Waveren 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).

  • Paper coating composition with increased thickener efficiency
    Patent number: 5494509
    Abstract: A paper coating composition is provided having a clay-containing pigment system, a binder, a polysaccharide thickener, and at least 0.005% to 2%, based upon the weight of the polymer, of a blocking agent that serves to prevent more than 25% of the polysaccharide thickener from being adsorbed onto the clay pigment surface. This coating is applied to raw paper for producing a high quality paper with smooth and substantially free of indentations surfaces for good ink to paper transfer.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: February 27, 1996
    Assignee: Aqualon Company
    Inventors: Dirk Kruythoff, Andre H. Van Waveren