Patents by Inventor Francis Pierrot

Francis Pierrot 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).

  • Polarographic cell
    Patent number: 4100048
    Abstract: A polarographic cell for measuring partial pressure of oxygen in a fluid in which the detector electrode and the reference electrode are immersed in an electrolyte at least partially absorbed in a rigid insulating material.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: July 11, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Jean Pompei, Francis Pierrot
  • Probe for detecting gaseous polar molecules such as water vapor
    Patent number: 4025892
    Abstract: Probe for selectively detecting polar molecules in a gaseous atmosphere in contact with the probe, characterized by a layer of semiconductor material covered by a film of dielectric material.
    Type: Grant
    Filed: May 13, 1975
    Date of Patent: May 24, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Jean Pompei, Bernard Lacroix, Francis Pierrot
  • Sensor for a gas detector, in particular for smoke detection
    Patent number: 4016524
    Abstract: Sensor for selectively detecting at least one constituent of a gaseous mixture in contact with the sensor. The sensor comprises a thin layer of a semiconductor material covered with a dielectric film formed with a large number of microscopic openings.
    Type: Grant
    Filed: May 14, 1975
    Date of Patent: April 5, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Jean Pompei, Bernard Lacroix, Francis Pierrot