Patents by Inventor Toshihiro Yoshinaga

Toshihiro Yoshinaga 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).

  • White conductive powder, a process for its production and a resin composition containing the powder
    Patent number: 5853887
    Abstract: The improved white conductive powder comprises white inorganic pigment particles the surfaces of which are coated with an electrically conductive layer of a dual structure consisting of a lower tin dioxide sub-layer and an upper tin dioxide-containing indium oxide sub-layer. To produce the powder, the hydration product of tin is deposited uniformly on the surfaces of white inorganic particles and, subsequently, an overcoat of indium oxide hydrate containing 0.1-20 wt % of tin dioxide is formed, followed by a heat treatment that is conducted at 350.degree.-750.degree. C. in a non-oxidizing atmosphere.
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: December 29, 1998
    Assignee: Titan Kogo Kabushiki Kaisha
    Inventors: Akihiro Yoshimoto, Toshihiro Yoshinaga, Shigeru Nagaoka, Masayasu Morishita