Patents Examined by Jay L. Yang
  • Hole transport materials
    Patent number: 9012037
    Abstract: There is provided a hole transport compound having Formula I or Formula II: Ar1 is the same or different at each occurrence and can be phenylene, naphthylene, or binaphthylene. Ar2 is the same or different at each occurrence and can be phenyl, biphenyl, terphenyl, naphthyl, or binaphthyl. m and n are the same or different and are an integer greater than 0. T is the same or different at each occurrence and is a conjugated moiety including at least one triarylamino group. The T moiety is connected in a non-planar configuration.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: April 21, 2015
    Assignee: EI du Pont de Nemours and Company
    Inventors: Gary A. Johansson, Eric Maurice Smith, Daniel David Lecloux