Patents by Inventor Shunsuke Ogami

Shunsuke Ogami 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: 5077168
    Abstract: Disclosed is a toner for the electrophotography, which comprises as a main component a styrene/acrylic copolymer having at least two molecular weight distribution peaks, the molecular weight (Mw) of the peak on the lowest molecular weight side being lower than 13000, wherein the toner contains a charge controlling agent dispersed therein at a concentration of at least 0.3% by weight and the charge controlling agent has such a particle size distribution that the area ratio of particles having a particle size larger than 2.5 .mu.m is at least 80% based on the section of the toner. If this toner is used, the fixing-possible temperature can be broadened while increasing the fixing ratio without reduction of the performances of the toner.
    Type: Grant
    Filed: December 28, 1989
    Date of Patent: December 31, 1991
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Shunsuke Ogami, Atsushi Yamaguchi, Hidenori Asada, Masanori Fujii, Hiroshi Komata, Kiminori Umeda, Takahiko Kimura