Patents by Inventor Hubert Igel

Hubert Igel 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 PRODUCTION OF PAPER
    Publication number: 20110126995
    Abstract: The present invention relates to a method for the production of paper from a suspension containing cellulosic fibers comprising adding to the suspension and/or to a formed paper prepared from the cellulosic suspension i) a nitrogen-containing organic compound separately and/or in conjunction with, ii) an aqueous dispersion of an acid anhydride and iii) at least one shading dye, draining the suspension on a wire to form a paper.
    Type: Application
    Filed: January 26, 2009
    Publication date: June 2, 2011
    Applicant: Akzo Nobel N.V.
    Inventors: Marie Turunen, Jonas Liesén, Hubert Igel