Patents by Inventor Per Arne Tondel

Per Arne Tondel 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).

  • Grain refining alloy and a method for grain refining of aluminum and aluminum alloys
    Patent number: 5424031
    Abstract: The present invention relates to a method for grain refining of aluminium and aluminium alloys wherein a siliconboron alloy containing between 0.01 to 4.0% by weight of boron is added to molten aluminium or aluminium alloy in such an amount that the resulting melt of aluminium or aluminium alloy contains at least 50 ppm boron. The invention further relates to a grain refining alloy for aluminium and aluminium alloys which grain refining alloy is a siliconboron alloy containing between 0.01 and 4.0% by weight of boron.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: June 13, 1995
    Assignee: Elkem Aluminium ANS
    Inventors: Lars Arnberg, Gunnar Halvorsen, Per Arne Tondel