Patents by Inventor Hisae Ishikawa

Hisae Ishikawa 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 developing electrostatic latent image, method for manufacturing the same, developer and method for forming image
    Patent number: 6096465
    Abstract: A toner composed of binder resin and carbon black particles has a volume-average particle diameter (D.sub.50) of 2.0 to 9.0 microns and a volume-average particle size distribution index (GSDv) of 1.25 or less. Carbon black particles adhering to the surfaces of toner particles have an absorption of 0.250 or less for ultraviolet radiation having a wavelength of 600 nm. Disclosed also are a method for producing the toner, a developer for developing an electrostatic latent image and a method in which the developer is used for forming animage.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: August 1, 2000
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuo Kadokura, Hisae Ishikawa, Shuji Sato, Masaaki Suwabe, Yasuo Matsumura