Patents by Inventor Micheal J. Dvorchak

Micheal J. Dvorchak 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 the production of sized and/or wet-strength papers, paperboards and cardboards
    Patent number: 8647471
    Abstract: The present invention relates to a process for the production of sized and/or wet-strength papers, paperboards or cardboards, wherein an aqueous radiation-curable dispersion containing water and at least one polymer, characterized in that the polymer contains cationic groups, is mixed with suspended wood pulp and/or chemical pulp and this mixture is sieved, pressed, thermally dried and then radiation-cured, characterized in that the dispersion is employed in amounts, based on its non-aqueous content in relation to the solid content of the wood pulp and/or chemical pulp, of from 0.001 to 10 wt. %, the papers, paperboards and cardboards produced by this process, and compositions comprising suspended wood pulp and/or chemical pulp and an aqueous radiation-curable dispersion containing at least one polymer, characterized in that the polymer contains cationic groups.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: February 11, 2014
    Assignees: Bayer MaterialScience LLC, Bayer MaterialScience AG
    Inventors: Stefan Sommer, Erhard Luehmann, Serkan Unal, Micheal J. Dvorchak