Patents by Inventor Brian J. Birth

Brian J. Birth 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).

  • Electrochemical measurement cell
    Patent number: 4900424
    Abstract: An electrochemical cell comprising two electrodes, wherein one of said electrodes is suitable for use as a reference electrode in electrochemical measurements, said device comprising (a) a capillary fill cell capable of receiving a small volume of aqueous sample liquid, said cell incorporating (b) a redox electrode located within said capillary fill cell, and (c) a reagent layer comprising quinhydrone located in said cell in a dry adherent water-soluble layer adherent to an inner surface of said cell opposite to or overlying said redox electrode and capable of dissolving during use in aqueous sample liquid in the region of said redox electrode.
    Type: Grant
    Filed: September 28, 1988
    Date of Patent: February 13, 1990
    Assignee: Unilever Patent Holdings B.V.
    Inventors: Brian J. Birth, Ian W. Burns