Patents Examined by Steve C. Crossan
  • Coated carrier particles for electrographic developers
    Patent number: 5061593
    Abstract: The invention provides coated carrier particles suitable for use in dry electrographic developers comprising a mixture of the carrier particles and toner particles. Each of the carrier particles comprises a core particle having a polymeric overcoat comprising poly(p-t-butylstyrene) or a copolymer of p-t-butylstyrene and a C.sub.1 -C.sub.4 alkyl methacrylate, wherein the polymer further comprises sulfur-containing end groups.
    Type: Grant
    Filed: December 12, 1989
    Date of Patent: October 29, 1991
    Assignee: Eastman Kodak Company
    Inventors: William E. Yoerger, Frank A. Pettrone