Patents by Inventor Klaus Sch{umlaut over (u)}bel

Klaus Sch{umlaut over (u)}bel 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).

  • Patent number: 6179893
    Abstract: There is disclosed a process to produce fertilizer granules containing urea and ammonium sulfate with a high ammonium sulfate concentration of ≦60 wt. % in a fluidized bed granulator, which process comprises the steps of: a) a molten urea suspension consisting of ammonium sulfate having an average particle size of 30 to 300 &mgr;m and urea having a temperature range of 120 to 155° C. is produced, b) the molten urea suspension produced at the stage a) is then injected from below on the fine particles of urea/ammonium sulfate in a fluidized bed granulator by means of at least a nozzle, while the fluidized bed is loosened by a spouting air flow in the injection area, and subsequently, c) the fertilizer granules generated in the fluidized bed are separated and, if necessary, treated. Homogeneous urea/ammonium sulfate granules of an ammonium sulfate content between 30 and 60 wt.
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: January 30, 2001
    Assignee: Toyo Engineering Corporation
    Inventors: Horst Bendix, Heinz Lange, Klaus Sch{umlaut over (u)}bel, Hans-Joachim Wachsmuth, Tetsuzo Honda, Eiji Sakata, Genshi Nishikawa