Patents by Inventor Kouzi Onishi

Kouzi Onishi 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).

  • Apparatus for directly coupling analytical column with mass spectrometer
    Patent number: 5449902
    Abstract: An apparatus for directly connecting an analytical column and a mass spectrometer comprising a fixed member having at least four holes which respectively introduce washing solution, eluate containing a component eluted from the analytical column, desalting solution and eluent for eluting the component, and a movable member rotated with respect to an axis having at least four tubes around the axis and mounting the four trapping columns, whereby the trapping columns are respectively washed, trapped, desalted and eluted in parallel. Furthermore, a common trapping column may be used instead of the four trapping columns by controlling the apparatus with four analytical modes.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: September 12, 1995
    Assignees: Hitachi, Ltd., Takeda Chemical Industries, Ltd.
    Inventors: Kouzi Onishi, Norio Tada, Yoshinobu Yoshimura, Yoshiaki Kato