Patents by Inventor John L. Courtney

John L. Courtney 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).

  • Electronic oven temperature controller having adaptable temperature regulation limits
    Patent number: 6381518
    Abstract: An oven temperature controller for regulating temperature to a temperature setpoint over a temperature range in an oven compartment comprising a microprocessor and memory storage means. The memory storage means stores temperature setpoint related information for temperature setpoints over the temperature range and this information is used by the microprocessor for establishing an upper control limit curve and a lower control limit curve. The upper control limit curve and lower control limit curve have no discontinuities over a majority of the temperature range and at least one of these curves is non-parallel to a temperature setpoint line, the temperature setpoint line formed in a stepwise linear manner between temperature setpoints as the temperature setpoint is varied over the temperature range.
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: April 30, 2002
    Assignee: Ranco Incorporated of Delaware
    Inventors: Jeffrey M. Huffington, Robert J. Alvord, John L. Courtney, Kimble Vitkus