Patents by Inventor Arne Sjoberg

Arne Sjoberg 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 apparatus for the separation of caustic liquor, lime sludge and sludge in a causticizing process
    Patent number: 4929355
    Abstract: In a causticizing process for separating at least white liquor and lime sludge out of the process, filters in the form of discs or drums are arranged. The filtrations take place under positive pressure and the filters are arranged in a closed system. Such a pressure filter can also be arranged for the separation of sludge.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: May 29, 1990
    Assignee: AB Hedemora Verkstader
    Inventors: Samuel Ragneg.ang.rd, Arne Sjoberg