Patents by Inventor Yasusi Umeda

Yasusi Umeda 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: 4288517
    Abstract: A toner composition for electrostatic photography which comprises (A) toner powder comprising a base resin and a coloring agent and having an average particle size of not more than 30 microns and (B) silica powder coated on its surface with the base resin of the toner powder.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: September 8, 1981
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Seiji Arimatsu, Katsukiyo Ishikawa, Yasusi Umeda, Koichi Nagata
  • Patent number: 4251622
    Abstract: A photo-sensitive composition for dry formation of image comprising a dyestuff having a photo-fading property, a ketonic sensitizing agent and a high molecular polymer as a binding agent, which can provide a visible image by the irradiation of light and maintain the image without any fixing treatment.
    Type: Grant
    Filed: March 1, 1978
    Date of Patent: February 17, 1981
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Koichi Kimoto, Yasusi Umeda, Shin Saito, Kunsei Tanabe, Yasuyuki Takimoto
  • Patent number: 4044385
    Abstract: Printing plate production apparatus wherein a latent image is formed at the surface of photoconductive insulating sheet, either by an optical system for effecting sheet exposure or by a laser emission scanning system which constitutes the terminal of a facsimile transmission system, this latent image is developed by toner particles, for example, which are applied on, but not fixed on the photoconductive sheet, the developed image is temporarily transferred onto a printing plate with which the photoconductive sheet is brought into pressure contact, and the printing plate carrying the developed image is exposed to light which may effect chemical changes in the printing plate to harden portion thereof unprotected by toner particles after which the printing plate receives treatment to remove toner particles and unhardened portions thereof.
    Type: Grant
    Filed: March 15, 1976
    Date of Patent: August 23, 1977
    Assignee: Nippon Paint
    Inventors: Masakatsu Nishimura, Shin Saito, Kunsei Tanabe, Yasusi Umeda, Seiji Arimatsu, Yasuyuki Takimoto