Patents Assigned to Longview Research & Development
  • Electrical heater
    Patent number: 7015428
    Abstract: A heater formed of multiple layers with at least two envelope layers sealed to each other to form a closed envelope and with at least one of the layers within the sealed envelope layers comprising a gas permeable internal ground member that permit one to heat seal the envelope layers to each other and prevents destruction of the heater if the heater accidentally exceeds a critical operating temperature.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: March 21, 2006
    Assignee: Longview Research & Development
    Inventor: Todd A. Kirkman