Patents by Inventor Yuka Okuda

Yuka Okuda 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).

  • Fluid colloid crystal and process for producing three-dimensional aligned particle mass therefrom
    Patent number: 7527829
    Abstract: Fluid colloidal crystals comprising a solid-liquid dispersion electrostatically charged at not more than 2000 ?S/cm in terms of an electrical conductivity, wherein the solid-liquid dispersion comprises, as a dispersoid, electrostatically chargeable spherical colloidal particles of an organic or inorganic polymer having a mean volume diameter (d) of not more than 30 ?m, and as a dispersion medium, an aqueous solution or a dissolving water-containing non-aqueous solution, the dispersion concentration of the spherical colloidal particles is not more than 70%, around the dispersoid an electric double layer of a given thickness (?e) is formed, and the spherical colloidal particles form a three-dimensionally ordered lattice that shows fluidity and is a particle array structure in which the colloidal particles are aligned longitudinally and laterally in a lattice form while an interparticle distance (L) defined as a distance between centers of the particles arranged opposite to each other along the center line satis
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: May 5, 2009
    Assignee: Soken Chemical & Engineering Co., Ltd.
    Inventors: Tetsuya Yoshida, Yuka Okuda, Youichi Takizawa, Junji Watanabe
  • Fluid colloid crystal and process for producing three-dimensionsl aligned particle mass therefrom
    Publication number: 20060182968
    Abstract: Fluid colloidal crystals comprising a solid-liquid dispersion electrostatically charged at not more than 2000 ?S/cm in terms of an electrical conductivity, wherein the solid-liquid dispersion comprises, as a dispersoid, electrostatically chargeable spherical colloidal particles of an organic or inorganic polymer having a mean volume diameter (d) of not more than 30 ?m, and as a dispersion medium, an aqueous solution or a dissolving water-containing non-aqueous solution, the dispersion concentration of the spherical colloidal particles is not more than 70%, around the dispersoid an electric double layer of a given thickness (?e) is formed, and the spherical colloidal particles form a three-dimensionally ordered lattice that shows fluidity and is a particle array structure in which the colloidal particles are aligned longitudinally and laterally in a lattice form while an interparticle distance (L) defined as a distance between centers of the particles arranged opposite to each other along the center line satis
    Type: Application
    Filed: July 30, 2004
    Publication date: August 17, 2006
    Inventors: Tetsuya Yoshida, Yuka Okuda, Youichi Takizawa, Junji Watanabe