Patents by Inventor Toshiyuki Sueyoshi

Toshiyuki Sueyoshi 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).

  • Carrier for developing electrostatic latent images, developer, and electrophotographic developing process
    Patent number: 5360691
    Abstract: A carrier for developing electrostatic latent images is disclosed, which comprises a core material at least a part of which is coated with a resin containing a copolymer comprised of vinylidene chloride and at least one monomer having an unsaturated double bond and being copolymerizable with vinylidene chloride, wherein the copolymer is comprised of (a) from 70 to 30 mol % of vinylidene chloride, (b) from 20 to 60 mol % of acrylonitrile and/or an acrylonitrile derivative, and (c) from 0 to 40 mol % of a monomer having an unsaturated double bond and being copolymerizable with components (a) and (b). An electrophotographic developer containing the carrier and an electrophotographic developing process using the developer are also disclosed.
    Type: Grant
    Filed: May 7, 1992
    Date of Patent: November 1, 1994
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Katsuo Koizumi, Shigenori Otsuka, Syuuichi Maeda, Hiromi Horiuchi, Hirofumi Oda, Toshiyuki Sueyoshi
  • Electrostatic developing toner with hydroxyaromatic carboxylic acid additive
    Patent number: 5200288
    Abstract: An electrostatic image-developing toner comprising at least a resin and a colorant, which contains at least one compound selected from the group consisting of a hydroxynaphthlenecarboxylic acid compound, a hydroxyanthracenecarboxylic acid compound, a bishydroxynaphthalenecarboxylic acid compound a bishydroxyanthracenecarboxylic acid compound, and a metal compound of a pamo acid-type compound.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: April 6, 1993
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Osamu Ando, Masako Takeuchi, Hitoshi Ono, Toshiyuki Sueyoshi, Shigenori Hayakawa