Patents by Inventor Ronald J. Borrup

Ronald J. Borrup 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).

  • Method for forming a heater element
    Patent number: 4384401
    Abstract: There is provided a flexible electric heater element and a process for making such a heater element.The flattened ends of two lead wires are disposed on a first layer of material which includes a vulcanizable elastomer. The ends of a resistance wire are placed in electrical contact with the flattened ends of the two lead wires. A second layer of material, which includes a vulcanizable elastomer, is placed over the first layer sandwiching between the layers the resistance wire in electrical contact with the flattened ends of the two lead wires. The other ends of the two lead wires extend externally to the first and second layers of material.The elastomer is vulcanized and the flattened ends of the lead wires are held in permanent electrical contact with the ends of the resistance wire by forces exerted by the vulcanized elastomer.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: May 24, 1983
    Assignee: Sierracin Corporation
    Inventor: Ronald J. Borrup
  • Heater element
    Patent number: 4320286
    Abstract: There is provided a flexible electric heater element and a process for making such a heater element.The flattened ends of two lead wires are disposed on a first layer of material which includes a vulcanizable elastomer. The ends of a resistance wire are placed in electrical contact with the flattened ends of the two lead wires. A second layer of material, which includes a vulcanizable elastomer, is placed over the first layer sandwiching between the layers the resistance wire in electrical contact with the flattened ends of the two lead wires. The other ends of the two lead wires extend externally to the first and second layers of material.The elastomer is vulcanized and the flattened ends of the lead wires are held in permanent electrical contact with the ends of the resistance wire by forces exerted by the vulcanized elastomer.
    Type: Grant
    Filed: December 7, 1979
    Date of Patent: March 16, 1982
    Assignee: Sierracin Corporation
    Inventor: Ronald J. Borrup