Patents by Inventor Hansjörg Kessler

Hansjörg Kessler 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).

  • Process for improving printing paper
    Patent number: 6251223
    Abstract: A process for improving gravure and offset printability of coated and uncoated printing papers by increasing filler share in the paper on the top and bottom sides or in the outer layers of the paper web by using a retention agent, and providing the outerlayers of the fiber bearing liquid forming the paper web with additional retention agent before or during sheet formation on or between the wires of the paper making machine.
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: June 26, 2001
    Assignee: Stora Publication Paper AG
    Inventors: Hansjörg Kessler, Dieter Horand, Wolfram Friesen