Patents Assigned to DuPont-Howson Limited
  • Radiation sensitive compositions
    Patent number: 5130228
    Abstract: A radiation sensitive composition comprises a radiation sensitive material and a dye which dye undergoes a color change in the radiation-struck areas on image-wise exposure of the composition and a color change when the exposed and developed composition is heated to a temperature of at least 180.degree. C.
    Type: Grant
    Filed: September 12, 1990
    Date of Patent: July 14, 1992
    Assignee: DuPont-Howson Limited
    Inventors: John R. Wade, Terrence Etherington, Christopher W. Folkard