Patents by Inventor John Troeng

John Troeng 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).

  • Patent number: 4354899
    Abstract: For concentration and possible purification of mineral acids, particularly sulphuric acid, a furnace which can be heated is utilized, in which one or several long quartz tubes are placed. The quartz tubes are sealed at the upper and lower parts of the furnace and inside the furnace the quartz tube is heated from the outside with the utilized means. The acid which is to be treated is fed to the respective quartz tube via the upper parts of this, and the purified acid is collected in a vessel located at the lower parts of the quartz tube. Packings of small and/or medium dimensions are arranged in the quartz tubes.
    Type: Grant
    Filed: December 12, 1980
    Date of Patent: October 19, 1982
    Assignee: Aktiebolaget Bofors
    Inventors: Hans Broberg, Lars Douren, John Troeng
  • Patent number: 4269655
    Abstract: The present invention provides a unique structure for concentrating mineral acids, and particularly sulphuric acid wherein a plurality of long quartz tubes extend vertically through a furnace and have vertically lower ends in communication with a receiving vessel. The quartz tubes are surrounded by tube units and flow passageways are created on either side of the tube units for directing hot combustion gases along the quartz tubes, providing convective and radiative heat transfer to the tubes as required to heat the acid flowing therethrough. An assembly is positioned for generating turbulance within the gas flow passageway to achieve a vigorous turbulance of the hot combustion gases.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: May 26, 1981
    Assignee: Aktiebolaget Bofors
    Inventors: Hans Broberg, Lars Douren, John Troeng