Patents by Inventor Stefan Wietfeldt-Haltenhoff

Stefan Wietfeldt-Haltenhoff 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).

  • Fluidized bed method and reactor for the treatment of catalysts and catalyst carriers
    Publication number: 20070207068
    Abstract: A method for the treatment of catalysts or catalyst carriers by: a) introducing and distributing a gas in the lower section of a reactor containing a catalyst or catalyst carrier bulk material; b) forming a fluidized bed in the reactor; c) treating the particles in the fluidized bed while removing the fine particles an/or retaining the course particles by means of a separating organ and d) discharging the reactor. To this end, a reactor bottom which tapers downwards is used.
    Type: Application
    Filed: May 8, 2007
    Publication date: September 6, 2007
    Inventors: Paulus Lange, Hendrik Schonfelder, Michael Kammerer, Hans Siebenhandl, Kaspar Evertz, Stefan Wietfeldt-Haltenhoff, Joachim Werther
  • Fluidized bed method and reactor for the treatment of catalysts and catalyst carriers
    Patent number: 7232551
    Abstract: A method for the treatment of catalysts or catalyst carriers by: a) introducing and distributing a gas in the lower section of a reactor containing a catalyst or catalyst carrier bulk material; b) forming a fluidized bed in the reactor; c) treating the particles in the fluidized bed while removing the fine particles an/or retaining the course particles by means of a separating organ and d) discharging the reactor. To this end, a reactor bottom which tapers downwards is used.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: June 19, 2007
    Assignee: Basell Polyolefine GmbH
    Inventors: Paulus De Lange, Hendrik Schönfelder, Michael Kämmerer, Hans Werner Siebenhandl, Kaspar Evertz, Stefan Wietfeldt-Haltenhoff, Joachim Werther