Patents by Inventor Katuya Yamaguti

Katuya Yamaguti 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).

  • Zirconium compound and electrophotographic toner employing it
    Patent number: 6552211
    Abstract: The present invention relates to a novel zirconium compound which is useful as a charge control agent for an electrophotographic toner. Further, it relates to an electrophotographic toner which contains said zirconium compound as a charge control agent.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: April 22, 2003
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Masataka Sawano, Taito Muraoka, Katuya Yamaguti, Rie Murakami, Hiroyoshi Yamaga
  • Zirconium compound and electrophotographic toner employing it
    Patent number: 6410198
    Abstract: The present invention relates to a novel zirconium compound which is useful as a charge control agent for an electrophotographic toner. Further, it relates to an electrophotographic toner which contains said zirconium compound as a charge control agent.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: June 25, 2002
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Masataka Sawano, Taito Muraoka, Katuya Yamaguti, Rie Murakami, Hiroyoshi Yamaga
  • Zirconium compound and electrophotographic toner employing it
    Publication number: 20010010887
    Abstract: The present invention relates to a novel zirconium compound which is useful as a charge control agent for an electrophotographic toner. Further, it relates to an electrophotographic toner which contains said zirconium compound as a charge control agent.
    Type: Application
    Filed: December 20, 2000
    Publication date: August 2, 2001
    Applicant: HODOGAYA CHEMICAL CO., LTD.
    Inventors: Masatake Sawano, Taito Muraoka, Katuya Yamaguti, Rie Murakami, Hiroyoshi Yamaga