Patents by Inventor Alexandre Choulga

Alexandre Choulga 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).

  • Cation-selective sensor
    Patent number: 6200444
    Abstract: The invention concerns a cation-selective sensor provided with a cation-selective coating and based on the fact that analyte ions present in a solution cause detectable changes in the electrical characteristics of the layer. The acid/base components in the cation-selective layer render the sensor function independent of the anions present in the analyte solution. This improves the measurement accuracy and lowers the detection threshold.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: March 13, 2001
    Assignee: Institut fuer Chemo und Biosensorik Muenster e.V.
    Inventors: Benedikt Ahlers, Alexandre Choulga, Karl Cammann
  • Analyte-selective sensor
    Patent number: 6004442
    Abstract: The invention concerns an analyte selective sensor for the qualitative and/or quantitative determination of ions or substances contained in solution. The proposed sensor (1) comprises at least one analyte-specific layer (3) deposited on an inert carrier (7) and in contact with the solution; this analyte-specific layer consists of a liquid, solid or semi-solid material and is in contact with at least two electrodes (5, 6). The layer (3) selectively removes the analyte from the solution so that its own electrical characteristics, such as resistance, conductivity, admittance or impedance, change as the analyte is taken up.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: December 21, 1999
    Assignee: Institut Fur Chemo- Und Biosensorik Munster E.V.
    Inventors: Alexandre Choulga, Benedikt Ahlers, Karl Cammann