Patents by Inventor Sven G. Soredal

Sven G. Soredal 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).

  • Emitter for field emission and method of making same
    Patent number: 4933108
    Abstract: A field emitter consists of a metal carrier wire coated with crystals of an oxide having a metallic luster and which is a compound of a transition metal selected from the group consisting of tungsten, molybdenum, niobium, vanadium and titanium.
    Type: Grant
    Filed: April 12, 1979
    Date of Patent: June 12, 1990
    Inventor: Sven G. Soredal
  • Plastic foams and method of making same
    Patent number: 4730009
    Abstract: A plastic foam is made by mixing a plastic material or its origin material with a blowing agent which does not react with the material, said agent having a maximum vapor pressure of 10 Pa at the highest permissible application temperature of the plastic foam and having a minimum vapor pressure of 600 Pa at a pressure at which said material is in plastic condition. A formed body of the mixture is then exposed to a pressure low enough to evaporate the blowing agent and form bubbles in the mixture, whereupon the body is cooled at low pressure to solidify the plastic material and substantially condense said agent, thereby providing said body with closed cells having a reduced internal pressure.
    Type: Grant
    Filed: March 21, 1984
    Date of Patent: March 8, 1988
    Inventor: Sven G. Soredal