Patents by Inventor Isabelle Levesque

Isabelle Levesque 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).

  • Conjugated polycarbazole derivatives in Organic Light Emitting Diodes
    Patent number: 6630254
    Abstract: An Organic Light Emitting Diode (OLED) includes as active material a conjugated poly(N-alkyl-2,7-carbazole) derivative described by the formula: wherein n is an integer of about 3 to about 100, and R represents a substituant that is a linear or branched alkyl group containing 1 to 22 carbon atoms, or poly(ethyleneoxy), cyano, aryl, amide or benzoyl. Such OLEDs have improved light emitting properties, especially in the blue and red regions of the spectrum.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: October 7, 2003
    Assignee: National Research Council of Canada
    Inventors: Mario Leclerc, Jean-Francois Morin, Isabelle Levesque, Marie D'Iorio, Christophe Py
  • Conjugated polycarbazole derivatives in Organic Light Emitting Diodes
    Publication number: 20030008172
    Abstract: An Organic Light Emitting Diode (OLED) includes as active material a conjugated poly(N-alkyl-2,7-carbazole) derivative described by the formula: 1
    Type: Application
    Filed: April 10, 2001
    Publication date: January 9, 2003
    Inventors: Mario Leclerc, Jean-Francois Morin, Isabelle Levesque, Marie D'Iorio, Christophe Py