Patents by Inventor Daniel T. Kistner

Daniel T. Kistner 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).

  • Patent number: 6142974
    Abstract: A portable intravenous fluid warming system wherein the temperature monitoring and control is accomplished utilizing four monolithic IC thermosensors. The sensors operate in a serial multi-stage fashion with the first sensor functioning so as to provide a ramp or build up to the next stage thus smoothly and gently increasing the temperature of the fluid and reducing the dynamic range required for the final heater stage, thus ensuring a more accurate and consistent output temperature. Power FET's provide heater drive current from an unregulated DC input source. The sensor is coupled to a microprocessor that is factory preprogrammed with predetermined set points. The microprocessor will continuously determine the temperature so as to allow determination of when the desired temperature is reached and will adjust power to the FET as necessary to hold the temperature at the correct point without exceeding the temperature. Interfacing is provided to an optional external digital readout unit for monitoring.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: November 7, 2000
    Assignee: Estill Medical Technologies, Incorporated
    Inventors: Thomas L. Kistner, Robert W. Storey, Daniel T. Kistner
  • Patent number: 6139528
    Abstract: A system for warming a circulatory fluid is disclosed, which system comprising in a preferred embodiment a warming element consisting of a body defining a bore having irregular fluid flow surfaces and heating elements disposed about said body, a control means electrically coupled to said warming element and a power source.
    Type: Grant
    Filed: January 13, 1998
    Date of Patent: October 31, 2000
    Assignee: Jireh International Corporation
    Inventors: Thomas L. Kistner, Daniel T. Kistner, George C. Burrell