Patents Examined by S. C. Crossman
  • Charge directors for use in electrophotographic compositions and processes
    Patent number: 5153090
    Abstract: Novel compounds useful as charge directors in color electrophotographic processes are described. Developer compositions containing the novel charge directors are provided as well. The developer compositions display high particle-mediated conductivity and charge and thus give rise to a final print of exceptionally high quality. Methods of manufacturing the toner and developer compositions are also disclosed, as are processes for using the various compounds and compositions in consecutive multicolor image development.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: October 6, 1992
    Assignee: CommTech International Management Corporation
    Inventor: Ronald Swidler