Patents by Inventor Shunsuke Oogami

Shunsuke Oogami 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: 4855204
    Abstract: A white toner comprising a fixing resin and dispersed therein, a titanium dioxide pigment of high purity containing at least 99% by weight of TiO.sub.2, not more than 0.1% by weight of Al.sub.2 O.sub.3 and not more than 0.05% by weight of SiO.sub.2 as a white pigment. The white toner has markedly improved hygroscopicity as a result of using the white pigment in which the contents of metal oxides such as Al.sub.2 O.sub.3 and SiO.sub.2 are reduced to very small amounts. The toner can thus retain the stable and uniform amount of triboelectric charge, and permits effective circumvention of troubles such as the reduction of image density, background fog and image blurring.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: August 8, 1989
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Masanori Fujii, Shuji Komura, Shunsuke Oogami