Patents by Inventor Sten Rune Ljung

Sten Rune Ljung 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).

  • Insert for the furnaces of boilers
    Patent number: 4000735
    Abstract: An insert for the furnaces of particularly oil-fired boilers for intermittent operation, comprising an assembly of elements of fire-resisting glass of slight material thickness relative to their total surface area. The assembly is placed such that heat is accumulated therein at the same time as the property of the glass to transmit flame radiation is exploited.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: January 4, 1977
    Inventor: Sten Rune Ljung