Patents by Inventor Per Ivar Karlsen

Per Ivar Karlsen 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).

  • Method and device for supporting catalyst gauzes in an ammonia oxidation burner
    Patent number: 7563419
    Abstract: A support system for catalyst gauzes in an ammonia oxidation burner and a method of reducing movement of particulate ceramic material due to thermal dilatation includes the catalyst gauzes (1) and possibly support screens (2) being supported by ceramic fillings contained in a burner basket with metal walls and a perforated bottom plate. A “wave breaker” (9, 11) is fixed to the metal wall (4) and/or the outer part/periphery of the bottom plate (5).
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: July 21, 2009
    Assignee: Yara International ASA
    Inventors: Halvor Øien, Leif Grønstad, Øystein Nirisen, Per Ivar Karlsen, Magne Slåen