Patents by Inventor ATSUSHI SUKA

ATSUSHI SUKA 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).

  • Charge control agent composition for external addition and electrostatic image developing toner
    Patent number: 9280077
    Abstract: There is provided an electrostatic image developing toner less likely to cause image degradation even when used for a long period, by controlling CCA particles present on surfaces of toner particles and thereby keeping an amount of tribocharge generated between the toner and a magnetic carrier or the like constant. A charge control agent composition for external addition for controlling charge amount of toner particles includes: at least two types of carrier particles different in average particle size of primary particles; and a charge control agent (CCA), and an electrostatic image developing toner is constituted of a mixture of toner particles and the aforesaid charge control agent composition for external addition.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: March 8, 2016
    Assignees: MORIMURA CHEMICALS LIMITED, SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Koichi Tsunemi, Toshihiko Oguchi, Atsushi Suka, Takashi Iimura, Kazuyuki Matsumura, Muneo Kudo, Masaki Tanaka, Yoshiteru Sakatsume
  • CHARGE CONTROL AGENT COMPOSITION FOR EXTERNAL ADDITION AND ELECTROSTATIC IMAGE DEVELOPING TONER
    Publication number: 20140170549
    Abstract: There is provided an electrostatic image developing toner less likely to cause image degradation even when used for a long period, by controlling CCA particles present on surfaces of toner particles and thereby keeping an amount of tribocharge generated between the toner and a magnetic carrier or the like constant. A charge control agent composition for external addition for controlling charge amount of toner particles includes: at least two types of carrier particles different in average particle size of primary particles; and a charge control agent (CCA), and an electrostatic image developing toner is constituted of a mixture of toner particles and the aforesaid charge control agent composition for external addition.
    Type: Application
    Filed: February 25, 2014
    Publication date: June 19, 2014
    Applicants: SHIN-ETSU CHEMICAL CO., LTD., MORIMURA CHEMICALS LIMITED
    Inventors: KOICHI TSUNEMI, TOSHIHIKO OGUCHI, ATSUSHI SUKA, TAKASHI IIMURA, KAZUYUKI MATSUMURA, MUNEO KUDO, MASAKI TANAKA, YOSHITERU SAKATSUME