Patents by Inventor Didier Lecacheux

Didier Lecacheux 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).

  • Viscosimeter operating continuously especially at high temperature
    Patent number: 4478071
    Abstract: The present invention concerns a viscosimeter adapted to operate continuously, comprising a measuring capillary in which the liquid phase whose viscosity is measured undergoes a loss of pressure. It is characterized in that the measuring capillary (17) consists of a tube of several meters length, wound around itself according to a helix having a diameter of at least 10 cm, the internal diameter of the tube being substantially comprised between 0.20 and 0.30 mm, and in that a sensor for measuring the loss of pressure consists of two identical pressure sensors (22,23) positioned at the entry and at the exit of the capillary (17) for differentially measuring the loss of pressure in this capillary.
    Type: Grant
    Filed: December 21, 1982
    Date of Patent: October 23, 1984
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Didier Lecacheux, James Lesec, Roland Prechner