Patents by Inventor Torfinn Buseth

Torfinn Buseth 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 for production of calcium compounds
    Patent number: 8268280
    Abstract: The present invention relates to a method for production of calcium compounds having very low content of phosphorus and boron from an impure calcium chloride, solution containing phosphorus and boron, which method comprises the following steps: a) addition of a FeCl3-solution to the calcium chloride solution, b) adjusting the pH of the solution by addition of a base to between 3 and 9.5 for precipitation of iron hydroxide, iron phosphate and boron compounds, c) removal of the solid precipitate from the solution in step b) obtaining a purified calcium chloride solution, d) precipitation of a calcium compound from the solution from step c), and e) separation of the calcium compound from the solution in step d).
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: September 18, 2012
    Assignee: Elkem Solar AS
    Inventors: Torfinn Buseth, Einar Andersen
  • METHOD FOR PRODUCTION OF CALCIUM COMPOUNDS
    Publication number: 20100303707
    Abstract: The present invention relates to a method for production of calcium compounds having very low content of phosphorus and boron from an impure calcium chloride, solution containing phosphorus and boron, which method comprises the following steps: a) addition of a FeCl3-solution to the calcium chloride solution, b) adjusting the pH of the solution by addition of a base to between 3 and 9.5 for precipitation of iron hydroxide, iron phosphate and boron compounds, c) removal of the solid precipitate from the solution in step b) obtaining a purified calcium chloride solution, d) precipitation of a calcium compound from the solution from step c), and e) separation of the calcium compound from the solution in step d).
    Type: Application
    Filed: January 7, 2009
    Publication date: December 2, 2010
    Applicant: ELKEM SOLAR AS
    Inventors: Torfinn Buseth, Einar Andersen
  • Apparatus for continuous slag treatment of silicon
    Patent number: 7232544
    Abstract: The invention relates to an apparatus for continuous slag treatment of molten silicon for removal of one a more impurity elements from the silicon, the apparatus comprising a vessel (1) intended to contain molten silicon and liquid slag.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: June 19, 2007
    Assignee: Elkem AS
    Inventors: Torfinn Buseth, Kenneth Friestad, Pal Runde
  • Apparatus for continuous slag treatment of silicon
    Publication number: 20040258588
    Abstract: The invention relates to an apparatus for continuous slag treatment of molten silicon for removal of one a more impurity elements from the silicon, the apparatus comprising a vessel (1) intended to contain molten silicon and liquid slag.
    Type: Application
    Filed: April 8, 2004
    Publication date: December 23, 2004
    Inventors: Torfinn Buseth, Kenneth Friestad, Pal Runde