Patents by Inventor Jon Lofthus

Jon Lofthus 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 of measuring dry substance in flue gases
    Patent number: 4690634
    Abstract: The invention relates to a method of measuring dry substance in the flue gas in liquor recovery units in mills for the manufacture of papermaking pulp in order thereby to render it possible to control the operation of the unit. According to the invention, this is carried out in that the radiation emission caused at the combustion of fuel particles in the hearth of the unit above the fuel supply level is detected optically, and that the signals are used for indication and/or control of the operation of the unit.
    Type: Grant
    Filed: May 22, 1986
    Date of Patent: September 1, 1987
    Assignee: Svenska Traforskningsinstitutet
    Inventors: Torbjorn Herngren, Jon Lofthus