Patents by Inventor Sayuri Kushi

Sayuri Kushi 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).

  • Eletrophotographic toner and image forming method
    Patent number: 6187497
    Abstract: An electrophotographic toner comprising colored particles comprised of inorganic particles is disclosed. The inorganic particles have a saturated moisture content WL at ambient conditions of 10° C. and 20 percent RH of 1.0 to 2.0 percent by weight, a BET value of 70 to 120 m2/g, and a number average primary particle diameter of 10 to 50 nm. Further, the volume average particle diameter of said electrophotographic toner is between 3.0 and 9.0 &mgr;m.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: February 13, 2001
    Assignee: Konica Corporation
    Inventors: Sayuri Kushi, Tsuyoshi Uchida, Kenji Yamane