Patents by Inventor Wilfred L. Persson

Wilfred L. Persson 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).

  • Fire or flame barrier material
    Patent number: 4543281
    Abstract: A fire or flame barrier material comprising an ethylene copolymer matrix, 150-220 parts by weight of aluminum hydroxide and 150-220 parts by weight of calcium carbonate or calcium-magnesium carbonate. The material can also include a lubricating agent, an elasticizer, calcium oxide, a polymer softening agent, a color-aging agent, and an antioxidant agent.
    Type: Grant
    Filed: November 8, 1983
    Date of Patent: September 24, 1985
    Assignee: A/S Norsk Kabelfabrik
    Inventors: Narve S. Pedersen, Wilfred L. Persson, Jan Hordvik, Arvid Kristiansen