Patents by Inventor Bernd-Holger Modrow

Bernd-Holger Modrow 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).

  • Purification of a crude lactam mixture by means of melt crystallization
    Patent number: 7807826
    Abstract: The present invention provides a method for purifying laurolactam from a crude lactam mixture. In the method of the present invention, laurolactam is selectively crystallized by melt crystallization with controlled cooling of the crude lactam mixture.
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: October 5, 2010
    Assignee: Evonik Degussa GmbH
    Inventors: Axel Hengstermann, Ralf Meier, Bernd Günzel, Martin Roos, Stephan Schäflein, Bernd-Holger Modrow
  • PURIFICATION OF A CRUDE LACTAM MIXTURE BY MEANS OF MELT CRYSTALLIZATION
    Publication number: 20090088567
    Abstract: The present invention provides a method for purifying laurolactam from a crude lactam mixture. In the method of the present invention, laurolactam is selectively crystallized by melt crystallization with controlled cooling of the crude lactam mixture.
    Type: Application
    Filed: October 2, 2008
    Publication date: April 2, 2009
    Applicant: EVONIK DEGUSSA GmbH
    Inventors: Axel Hengstermann, Ralf Meier, Bernd Guenzel, Martin Roos, Stephan Schaflein, Bernd-Holger Modrow