Patents by Inventor Lutz Driesen

Lutz Driesen 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 the preparation of nitrocellulose solutions having a low water content
    Patent number: 8388748
    Abstract: The present invention relates to the continuous preparation of alcohol- and plasticizer-free finished nitrocellulose solutions having a particularly low water content by partial distillative falling-film evaporation of comparatively water-rich, optionally emulsion-like crude nitrocellulose solutions which are preferably provided by dissolving nitrocelluloses of the customary solid forms offered, which are known to be initially water-moist as a result of the preparation, in preferably ethyl acetate.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: March 5, 2013
    Assignee: Dow Global Technologies LLC
    Inventors: Holger Tanneberger, Lutz Driesen, Juergen Engelstardt, Werner Lange, Hans-Guenter Poersch-Panke
  • Process for the Preparation of Nitrocellulose Solutions having a low Water Content
    Publication number: 20100126382
    Abstract: The present invention relates to the continuous preparation of alcohol- and plasticizer-free finished nitrocellulose solutions having a particularly low water content by partial distillative falling-film evaporation of comparatively water-rich, optionally emulsion-like crude nitrocellulose solutions which are preferably provided by dissolving nitrocelluloses of the customary solid forms offered, which are known to be initially water-moist as a result of the preparation, in preferably ethyl acetate.
    Type: Application
    Filed: March 31, 2008
    Publication date: May 27, 2010
    Inventors: Holger Tanneberger, Lutz Driesen, Juergen Engelstardt, Werner Lange, Hans-Guenter Poersch-Panke