Patents Assigned to Sunstone Inc.
  • Phosphors and methods of preparing the same
    Patent number: 4857228
    Abstract: Phosphors based on a crystalline matrix of an alkaline earth and a chalcogen together with an activator system are prepared by a process which preferably includes exposure to both S and Se vapors. The phosphors have enhanced light output. IR-stimulable phosphors have stimulation quantum efficiencies above 5%, and preferably include Eu:Sm or Eu:Bi activator systems. Eu:Cu activators provide phosphorescent phosphors.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: August 15, 1989
    Assignee: Sunstone Inc.
    Inventors: Gabriella H. Kabay, Ernest Kabay