Patents by Inventor Yuka Ishihara

Yuka Ishihara 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).

  • Patent number: 5663021
    Abstract: A film for electrophotographic transfer comprising a transparent plastic film having a heat resistance temperature of 100.degree. C. or higher having provided on at least one side thereof a transparent resin layer, wherein the transparent resin layer comprises a polyester resin having a peak count value (A) in GPC molecular weight measurement which satisfies relationship: -30.ltoreq.A-B.ltoreq.+20, in which B is a peak count value of the binder resin of a color toner used for fixing, and an initial count value (Cp) in the GPC molecular weight measurement which satisfies relationship: -500.ltoreq.Cp-Ct.ltoreq.-200, in which Ct is an initial count value in the GPC molecular weight measurement of the binder resin of a color toner used for fixing, or a polyester resin having a weight average molecular weight of from 15000 to 40000 and a weight average molecular weight to number average molecular weight ratio of from 3.5 to 10; the transparent resin layer has a thickness of from 1 to 8 .mu.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: September 2, 1997
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kiyoshi Hosoi, Tsukasa Matsuda, Masanori Ichimura, Yuka Ishihara, Takashi Sakai
  • Patent number: 5340678
    Abstract: A dry toner for developing an electrostatic latent image comprising toner particles and fine particles of a lubricant coated with an inorganic compound fine powder and an image formation method using the same. The toner is excellent in fluidity, cleaning properties, stability with environmental changes, and durability.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: August 23, 1994
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Chiaki Suzuki, Atuhiko Eguchi, Yuka Ishihara, Takayoshi Aoki, Seiichi Takagi, Toshiyuki Yano, Masao Mochizuki