Patents by Inventor Kensaku Togao

Kensaku Togao 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).

  • Toner for electrostatic-image development, developer for electrostatic image, and image forming process using the same
    Patent number: 5804351
    Abstract: A toner for electrostatic-image development which comprises toner particles comprising a colorant and a binder resin, the toner particles having a volume-average particle diameter of from 3 to 9 .mu.m and a particle size distribution satisfying the following expressions (1) and (2):D16(v)/D50(v).ltoreq.1.475-0.036.times.D50(v) (1)D50(p)/D84(p).ltoreq.1.45 (2)wherein D16(v) and D50(v) represent, in terms of absolute value, a cumulative 16% diameter (.mu.m) and a cumulative 50% diameter (.mu.m), respectively, of a cumulative volume particle diameter distribution of the toner particles depicted from the larger diameter side, and D50(p) and D84(p) represent, in terms of absolute value, a cumulative 50% diameter (.mu.m) and a cumulative 84% diameter (.mu.m), respectively, of a cumulative population particle diameter distribution of the toner particles depicted from the larger diameter side.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: September 8, 1998
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hiroshi Takano, Masanori Ichimura, Masaki Hashimoto, Hideyuki Akagi, Kazuya Furuta, Koji Fukushima, Masahiro Takagi, Kensaku Togao, Satoru Ishigaki, Michio Take, Yuka Ishihara