Patents by Inventor Toji Nakatsui

Toji Nakatsui 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).

  • Free-flow electrophoretic separation method and apparatus therefor
    Patent number: 4749458
    Abstract: The invention discloses a free-flow electrophoretic separation method and apparatus for separating charged substances such as proteins, cells, and the like, by electrophoresis, which comprises supplying a mixed solution containing the charged substances to be separated, which are dissolved in a separation buffer, into a separation chamber, circulating the mixed solution inside the separation chamber, applying a d.c. voltage to the mixed solution to cause the electrophoresis of the charged substances and to separate them, and withdrawing the charged substances thus separated from outlets disposed at one and the other end of the separation chamber.
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: June 7, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Muroi, Kosai Hiratsuka, Shoji Yoshinaga, Toji Nakatsui, Chikao Oda, Kiyoshi Fujiwara
  • Free-flow electrophoretic separation method and apparatus therefor
    Patent number: 4698142
    Abstract: The invention discloses a free-flow electrophoretic separation method and apparatus for separating charged substances such as proteins, cells, and the like, by electrophoresis, which comprises supplying a mixed solution containing the charged substances to be separated, which are dissolved in a separation buffer, into a separation chamber, circulating the mixed solution inside the separation chamber, applying a d.c. voltage to the mixed solution to cause the electrophoresis of the charged substances and to separate them, and withdrawing the charged substances thus separated from outlets disposed at one and the other end of the separation chamber.
    Type: Grant
    Filed: July 31, 1985
    Date of Patent: October 6, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Muroi, Kosai Hiratsuka, Shoji Yoshinaga, Toji Nakatsui, Chikao Oda, Kiyoshi Fujiwara