Patents by Inventor Stefan Werschofen

Stefan Werschofen 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 PRODUCING LIGHT-COLOURED POLYISOCYANATES
    Publication number: 20140249289
    Abstract: The invention relates to a method for producing light-coloured polyisocyanates by phosgenation of mixtures comprising MDA and polycyclic aromatic polyamines that have o-phenylenediamine units incorporated via methylene bridges. The invention further relates to the polyisocyanate mixtures obtainable by this method.
    Type: Application
    Filed: October 18, 2012
    Publication date: September 4, 2014
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Thomas Ernst Mueller, Christoph Guertler, Axel Scherer-Werke, Stefan Werschofen, Henning Vogt, Walter Leitner