Patents by Inventor Alain Delaunay

Alain Delaunay 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 for manufacturing sensitive elements having a permanent electric polarization and device for performing the same
    Patent number: 4261287
    Abstract: The permanent electric polarization is imparted to the sensitive element by electronic bombardment within an enclosure wherein prevails a rarefied atmosphere and in which said bombardment is followed with a coating of the so-polarized sensitive element with a film of liquid of very low saturating vapor pressure whose dielectric strength is higher than that of the rarefied air of the enclosure and having advantageously lubricating properties.
    Type: Grant
    Filed: May 31, 1979
    Date of Patent: April 14, 1981
    Assignee: Institut Francais du Petrole
    Inventors: Jean-Claude Dubois, Alain Delaunay
  • Method for manufacturing sensitive elements having a permanent electric polarization
    Patent number: 4173659
    Abstract: The permanent electric polarization is imparted to the sensitive element by electronic bombardment within an enclosure wherein prevails a rarefied atmosphere and in which said bombardment is followed with a coating of the so-polarized sensitive element with a film of liquid of very low saturated vapor pressure whose dielectric strength is higher than that of the rarefied air of the enclosure and having advantageously lubricating properties.
    Type: Grant
    Filed: July 5, 1977
    Date of Patent: November 6, 1979
    Assignee: Institut Francais du Petrole
    Inventors: Jean-Claude Dubois, Alain Delaunay