Patents by Inventor Rupert Kraus

Rupert Kraus 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).

  • Preparation of isocyanates having a light color
    Patent number: 5872278
    Abstract: In a process for preparing isocyanates having a light color by reacting the corresponding amines with phosgene, the amines are treated with solid inorganic substances containing Lewis acid and/or Bronsted acid centers prior to the reaction with the phosgene.
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: February 16, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Rupert Kraus, Martin Reif, Bernd Bruchmann, Helmut Tesch