Patents by Inventor Frank D. Kelly

Frank D. Kelly 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).

  • Equisensitive ambipolar indium doped selenium containing electrophotographic materials, plates and method
    Patent number: 4370399
    Abstract: An ambipolar electrophotographic plate and materials used in the manufacture thereof including a photoconductive layer formulated of selenium, selenium-arsenic alloy or selenium-arsenic-tellurium alloy containing indium as a dopant which extends the range for electrons without noticeable deterioration of the long range for holes.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: January 25, 1983
    Assignee: A. B. Dick Company
    Inventors: Syamal K. Ghosh, Frank D. Kelly