Patents Assigned to DPI Solutions, Inc.
  • Composition for coating organic electrode and method of manufacturing an organic conductive layer having excellent transparency using the composition
    Patent number: 7393472
    Abstract: The present invention relates to a composition for coating an organic electrode and method of manufacturing an organic electrode having a excellent transparency using the composition comprising 3% to 20% by weight of a polyhydric alcohol, polyol or a mixture thereof, 5% to 10% by weight of a primary alcohol having C1 to C5, 5% to 25% by weight of a amide, sulfoxide or a mixed solvent thereof, 0.01% to 0.1% by weight of a surfactant and a aqueous solution of polyethylenedioxythiophene (PEDOT) conductive polymers having nano-sized particle in a remainder. The present invention indicates the excellent transparency that transmittance of organic conductive layer is more than 90% in the visible ray area and sheet resistance is 300 to 900 ?/sq in case of coating.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: July 1, 2008
    Assignee: DPI Solutions, Inc.
    Inventors: Jong-Woo Lee, Chul-Hwan Kim, Hyun-Nam Yoon
  • 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 particles for use in color toner and method of making same
    Patent number: 6531255
    Abstract: A particulate composition suitable for making color toner includes resin particles optionally containing a charge control agent. The particles are characterized by a micro-serrated surface exhibiting a surface roughness index of at least about 1.2 and preferably higher. A process for making the particulate composition utilizes a vaporizable plasticizer.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: March 11, 2003
    Assignee: DPI Solutions, Inc.
    Inventors: Chul-Hwan Kim, Seung-Wook Lim, Tae-Ho Park, Hyun-Nam Yoon
  • Micro-serrated color toner particles and method of making same
    Patent number: 6461783
    Abstract: A particulate toner composition is provided with toner resin particles containing a resin component, a colorant component, and optionally a charge control agent characterized in that the toner resin particles have a micro-serrated surface exhibiting a surface roughness index of greater than about 1.2. The novel toner particles are produced by employing a vaporizable plasticizer which is flashed off during processing.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: October 8, 2002
    Assignee: DPI Solutions, Inc.
    Inventors: Chul-Hwan Kim, Seung-Wook Lim, Jongkwan Kim, Hyun-Nam Yoon