Patents by Inventor Christophe Pijolat

Christophe Pijolat 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).

  • Publication number: 20180188202
    Abstract: A NOx gas sensor for placing in a gas stream of a heat engine exhaust device. The sensor includes a sensing element having a solid electrolyte with a first surface on which there extend a work electrode, a reference electrode, and a counter-electrode. The work electrode being made of a material having electrocatalytic and catalytic activity that are less than the electrocatalytic and catalytic activity of the materials of the reference electrode and of the counter-electrode, and the counter-electrode and the sensor include a catalytic filter surrounding the sensing element and bias means for negatively polarizing the work electrode. A detector device comprising a plurality of sensors of this type. A corresponding catalytic exhaust device.
    Type: Application
    Filed: June 17, 2016
    Publication date: July 5, 2018
    Inventors: Jean-Paul VIRICELLE, Philippe VERNOUX, Christophe PIJOLAT, Philippe BREUIL
  • Patent number: 4988539
    Abstract: A method of manufacturing a sensor for detecting trace or impurity gases, the method comprising evaporating tin and/or tin oxides under a partial pressure of oxygen in order to condense vapor on an electrically insulating substrate to obtain a porous layer deposit therein. The metal or the metal oxides is/are evaporated under a flow of a mixture of gases containing both oxygen and an inert gas at a total pressure of not less than 100 pascals and with the partial pressure of the oxygen in the mixture being not more than 130 pascals.
    Type: Grant
    Filed: December 6, 1989
    Date of Patent: January 29, 1991
    Assignee: Association pour la Recherche et le Developpment des Methodes et Processus Industriels - Armines
    Inventors: Philippe Breuil, Christophe Pijolat, Guy Tournier, Lalauze Rene
  • Patent number: 4485667
    Abstract: An enclosure (17) contains two ovens (18, 19) each containing a semiconductor metal oxide (SnO.sub.2 or NiO) sensor (13) previously activated using H.sub.2 S or SO.sub.2. The sensors (13) are heated to different temperatures the lower of which corresponds to a peak on the sensor conductivity curve characteristic of the gas. The signals produced are applied to a comparator (30). For many toxic gases this peak occurs at concentrations below their toxicity threshold in air.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: December 4, 1984
    Assignee: Association pour la Recherche et la Developpement des Methodes et Processus Industriels (Armines)
    Inventors: Rene Lalauze, Christophe Pijolat, Jean-Paul Couput