Patents by Inventor Eui-Jun Choi

Eui-Jun Choi 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).

  • Micro-serrated, dyed color toner particles and method of making same
    Patent number: 6544705
    Abstract: A color toner composition includes dyed toner resin particles having a volume average diameter in the range of from about 2 microns to about 10 microns with a size distribution span value of less than 1.0. Preferred particles are characterized further by a micro-serrated surface exhibiting a roughness index value larger than about 1.2. The resin toner particles are prepared utilizing a dye-mediating co-solvent which facilitates transfer from a dispersion medium to the resin particles.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: April 8, 2003
    Assignee: DPI Solutions, Inc.
    Inventors: Chul-Hwan Kim, Eui-Jun Choi, Tae-Ho Park, Seok-Jin Kim, Hyun-Nam Yoon
  • Micro-serrated, dyed color toner particles and method of making same
    Publication number: 20020182527
    Abstract: A color toner composition includes dyed toner resin particles having a volume average diameter in the range of from about 2 microns to about 10 microns with a size distribution span value of less than 1.0. Preferred particles are characterized further by a micro-serrated surface exhibiting a roughness index value larger than about 1.2. The resin toner particles are prepared utilizing a dye-mediating co-solvent which facilitates transfer from a dispersion medium to the resin particles.
    Type: Application
    Filed: May 18, 2001
    Publication date: December 5, 2002
    Inventors: Chul-Hwan Kim, Eui-Jun Choi, Tae-Ho Park, Seok-Jin Kim, Hyun-Nam Yoon