Patents by Inventor Thomas B. Persson

Thomas B. 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).

  • Process for sealing the end of insulated pipes which have a number of monitoring wires, and means for carrying out the process
    Patent number: 4576661
    Abstract: The structure and process for providing a sealed insulated piping arrangement by introducing a molten sealing material between the inner fluid conducting pipe, and an outer casing, which space may include monitoring wires. The sealing material is introduced in a molten state to provide a liquid-impermeable filling, and then providing an enclosing seal at the end with a smooth transition for passage of the monitoring wires.
    Type: Grant
    Filed: April 12, 1984
    Date of Patent: March 18, 1986
    Inventor: Thomas B. Persson