Patents by Inventor Richard Reppisch

Richard Reppisch 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 utilizing catalytic material for the reduction of nitrous oxides
    Patent number: 4812296
    Abstract: Catalytic material for reducing nitrous oxides in flue gases in the presence of ammonia in which titanium oxide is used as the starting material and the latter is milled together with vanadium oxide and one or more oxides of the elements tungsten, molybdenum, phosphorus, chromium, copper, iron, uranium and is thereafter subjected to at least one thermal treatment. Tungsten and molybdenum are substituted here entirely or partially by phosphorus in the form of its oxides or phosphates.
    Type: Grant
    Filed: January 22, 1988
    Date of Patent: March 14, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventors: Helmut Schmelz, Helmut Thomann, Renate Kuschke, Eva-Helga Wilbert, Wolfgang Gajewski, Josef Sprehe, Norbert Landgraf, Hans Ranly, Lothar Balling, Richard Reppisch, Dietmar Hein