Patents Examined by Christopher D. PoDee
  • Preparation process of toner
    Patent number: 5217839
    Abstract: Disclosed herein is a process for the preparation of a toner, which comprises dissolving or dispersing a compound having at least one >C.dbd.N.sup..sym. < bond in its molecule and a colorant in a vinyl monomer and then suspension-polymerizing the vinyl monomer in an aqueous dispersion medium.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: June 8, 1993
    Assignees: Nippon Zeon Co., Ltd., Casco Nobel AB
    Inventors: Fumio Yamada, Hiromitsu Kikuchi, Tsuyoshi Yamamoto, Jun Saito, Shizuo Kitahara