Patents by Inventor Anne Liotard

Anne Liotard 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 device for measuring the quantity of an active principle contained in a reservoir
    Patent number: 5889396
    Abstract: A solution of active principle, in ionized form, impregnates a layer (2) forming part of the reservoir (1). A measurement of the quantity of active principle contained in this layer is derived from a measurement of the conductivity of this layer. The measurement device comprises a) first (7) and second (10) electrodes placed on either side of and in electrical contact with at least a part of the layer (2) of the impregnated material of the reservoir, b) means (5) for passing the electric current of predetermined strength through the impregnated material and c) means (6) sensitive to the voltage (V) picked up between the electrodes (7, 10) in order to calculate the quantity of active principle contained in the reservoir.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: March 30, 1999
    Assignee: Laboratoires d'Hygiene et de Dietetique (L.H.D.)
    Inventors: Philippe Millot, Anne Liotard