Patents by Inventor Harald Leps

Harald Leps 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 decreasing the chlorine content of organic isocyanates
    Patent number: 6222066
    Abstract: A process for the purification of organic isocyanates or isocyanate mixtures in which the amount of chlorine compound(s) present is reduced by mixing the isocyanate(s) or isocyanate mixtures with a gel-type or macroporous, anion-exchanging organic material having tertiary and/or quaternary amino groups. The process renders possible a purification of the isocyanates from chlorine-containing compounds which is milder than in conventional processes and is therefore particularly suitable for temperature-sensitive isocyanates.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: April 24, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karsten Danielmeier, Harald Leps, Dieter Mager, Reinhard Halpaap, Martin Brahm, Reinhold Klipper, Andreas Hauner