Patents by Inventor Richard N. Carr

Richard N. Carr 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 and apparatus for producing electrochemical impedance spectra
    Patent number: 5425867
    Abstract: A method for producing electrochemical impedance spectra. Spontaneously occuring coupling current noise between an array of electrodes which may be of substantially the same material is detected. A time domain record of the detected current noise is stored and the time domain record of the detected current noise is transformed to the frequency domain. Spontaneously occurring potential noise between the array of electrodes and a further electrode is detected. A time domain record of the detected potential noise is stored and the time domain record of the detected potential noise is transformed to the frequency domain. The frequency domain current noise and potential noise transformations are then transformed to the impedance domain to produce the required electrochemical impedance spectra.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: June 20, 1995
    Assignee: Capcis March Limited
    Inventors: John L. Dawson, David A. Eden, Richard N. Carr