Patents by Inventor Bernd Eck

Bernd Eck 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 N-vinylpyrrolidone by crystallization
    Patent number: 5710284
    Abstract: In a process for purifying N-vinylpyrrolidone by crystallization in a crystallizer, those surfaces of the crystallizer from which crystals grow during the crystallization are covered with an N-vinylpyrrolidone seed layer before the crystallization.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: January 20, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Schmidt-Radde, Herbert Helfert, Bernd Eck, Bernhard Maltry