Patents by Inventor Timothy J. Forsythe

Timothy J. Forsythe 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).

  • Self diagnostic pH sensor
    Patent number: 5268852
    Abstract: An apparatus and method for measuring potentiometric electrode impedance for diagnostic purpose while continuously reading the results of the process value. A square wave is applied to an external circuit, which in turn is coupled to an electrode assembly output through a capacitor. The output of the electrode is converted into a pulse width modulated signal and sampled. These sampled values are used to calculate the impedance and process output value.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: December 7, 1993
    Assignee: Rosemount Analytical Inc.
    Inventors: Timothy J. Forsythe, Roland H. Koluvek