Patents by Inventor Peter-Joachim Barenthien

Peter-Joachim Barenthien 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).

  • Nanodisperse titanium dioxide, process for the production thereof and use thereof
    Patent number: 5840111
    Abstract: The present invention relates to nanodisperse titanium dioxide, to a process for the production thereof and to the use thereof.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: November 24, 1998
    Assignee: Bayer AG
    Inventors: Gerhard Wiederhoft, Kai Butje, Peter-Joachim Barenthien, Michael Bodiger, Heinrich Alberts
  • Process for the production of mixed oxide powders for catalysts for the removal of nitrogen oxides
    Patent number: 5723404
    Abstract: A process for the production of a mixed oxide powder, that contains as chief constituent TiO.sub.2 in the form of anatase and as minor constituents at least one of the catalytically active oxides MoO.sub.3, WO.sub.3 and V.sub.2 O.sub.5, suitable for use as a catalyst for the removal of nitrogen oxides, comprising(a) partially neutralizing a titanium dioxide hydrate suspension containing sulphuric acid with an alkaline liquor to a pH value between about 4.0 and 6.0 at temperatures between about 20.degree. and 100.degree. C.,(b) filtering the suspension from (a) to produce a filter cake and intensively washing the filter cake,(c) adding to the filter cake from (b) at least one water-soluble salt of at least one of the metals Mo, W and V in solid or dissolved form, and(d) drying the filter cake from (c) and calcining it at a temperature between about 300.degree. and 750.degree. C.
    Type: Grant
    Filed: May 16, 1996
    Date of Patent: March 3, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Kai Butje, Jurgen Kischkewitz, Rolf Michael Braun, Udo Holtmann, Peter-Joachim Barenthien