Patents by Inventor Robert Bankwitz

Robert Bankwitz 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).

  • Continuous process for the preparation of organic isocyanates
    Patent number: 5599968
    Abstract: Organic isocyanates are continuously prepared by reacting primary organic amines with phosgene in the presence of an inert, organic solvent, with the reaction mixture being circulated by means of a bubble column at a temperature of from 60.degree. to 100.degree. C. and with the ratio of the quantity of the circulated amine reaction products to the quantity of the amine supplied of from 100:1 to 5:1.
    Type: Grant
    Filed: December 4, 1995
    Date of Patent: February 4, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Robert Bankwitz, Herbert Gebauer, Christian K onig, Eckart Waldau