Patents by Inventor Johann Jansen

Johann Jansen 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).

  • Snowplow
    Patent number: 4843744
    Abstract: A snowplow whose blade is joined means of at least two links disposed one over the other to an implement plate which can be fastened to a vehicle plate of a working vehicle has a system which assures the proper operation of the blade even when it passes over obstacles. This system permits an upper and lower link to be raised over obstacles and to tilt the links due to the fact that the upper link or links are made so as to be able to elongate against the action of a spring force.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: July 4, 1989
    Assignee: Ing. Alfred Schmidt GmbH
    Inventor: Johann Jansen
  • Process for the manufacture of a catalyst for the reduction of nitrogen oxides in exhaust gases
    Patent number: 4751212
    Abstract: The invention relates to a process for the manufacture of a catalyst for the reduction of nitrogen oxides in exhaust gases. The catalyst contains a metal oxide. The catalyst is preferably used for catalytic reduction with ammonia. The process comprises screening a natural goethite iron ore to the required grain size and then treating the ore with sulfuric acid. Subsequently, the goethite iron ore is heated to a temperature which approximately equals the temperature at which it will be used in the catalytic reaction.
    Type: Grant
    Filed: December 5, 1986
    Date of Patent: June 14, 1988
    Assignees: Didier Engineering GmbH, Didier-Werke AG
    Inventors: Claus Flockenhaus, Erich Hackler, Karl H. Laue, Klaus Merkel, Arnold Max, Werner Stender, Johann Jansen, Hartmut Kainer, Daniel Grimm, Blagoje Levkov
  • Process for the manufacture of catalyst molding
    Patent number: 4746483
    Abstract: In a process for the manufacture of catalyst moldings a natural raw material containing Fe.sub.2 O.sub.3, Cr.sub.2 O.sub.3 or another such catalyst component such as TiO.sub.2, NbO.sub.2, WO.sub.3, V.sub.2 O.sub.5 or MoO.sub.3 is screened to a grain size equal to or less than approximately 0.25 mm. This screened base mixture is thoroughly blended, and then preferably a concentrated sulphuric acid is added. This mixture of material is then pressed into a molding in a hydraulic press with a pressure of approximately 500 bar to produce the molding.
    Type: Grant
    Filed: September 9, 1986
    Date of Patent: May 24, 1988
    Assignees: Didier Engineering GmbH, Didier Werke AG
    Inventors: Claus Flockenhaus, Karl-Heinz Laue, Klaus Merkel, Erich Hackler, Johann Jansen, Arnold Max, Werner Stender, Reinhard Kruse, Hartmut Kainer, Daniel Grimm, Blagoje Levkov
  • Catalyst for the selective reduction of nitrogen oxides in waste gases and process for the manufacture of such a catalyst
    Patent number: 4695559
    Abstract: A catalyst for use with ammonia for the selective reduction of nitrogen oxides in waste gases. The catalyst comprises a mixture of substances which has high activity and selectivity with regard to nitrogen oxide conversion and high sorption capabilities with regard to ammonia, but low oxidation capabilities with regard to sulfur dioxide, ammonia, or similar substances. The invention also provides a process for the manufacture and use of such catalysts.
    Type: Grant
    Filed: February 19, 1986
    Date of Patent: September 22, 1987
    Assignees: Didier-Werke AG, Didier Engineering GmbH
    Inventors: Dietrich Wagener, Karl H. Laue, Egmar Wunderlich, Theo Sander, Claus Flockenhaus, Erich Hackler, Biagoje Levkov, Daniel Grimm, Hartmut Kainer, Hermann Stein, Hans-Eugen Buhler, Horst Kalfa, Johann Jansen, Werner Stender, Arnold Max