Patents by Inventor Knut Ronningen

Knut Ronningen 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).

  • Forehearth
    Patent number: 4854960
    Abstract: A forehearth for transport of molten glass, characterized in that cooling surfaces of a material having a high heat conductivity, particularly a metallic material, are disposed in the roof of the forehearth. The metallic material may be an iron-chromium-aluminum alloy having fifteen to thirty percent by weight of chromium, three to twelve percent by weight of aluminum, and a balance of essentially iron.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: August 8, 1989
    Assignee: Kanthal AB
    Inventors: H.ang.kan Lindgren, Jan O. Olsson, Martin Knudsen, Knut Ronningen