Patents by Inventor Kouji Iwatani

Kouji Iwatani 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).

  • Chromatographic plate
    Patent number: 4587020
    Abstract: A chromatographic plate comprising a support having a plurality of linear grooves engraved on the rear is disclosed. Each of said grooves have a uniform depth of a half or less as large as the thickness of the support and serves to guide a cutter. After the chromatographic development, the support may easily be cloven along the grooves into strips together with an adsorbent layer carried by the front of the support to give a sample holder for mass spectrometry.
    Type: Grant
    Filed: August 16, 1984
    Date of Patent: May 6, 1986
    Assignee: Shionogi & Company, Ltd.
    Inventors: Yuzo Nakagawa, Kouji Iwatani, Tetsuro Kadono
  • Sample holding element for mass spectrometer
    Patent number: 4267457
    Abstract: Quantitative determinations by means of mass spectrometry of substances which have hitherto been very difficult to perform are made possible by the employment of the sample holding element of the present invention composed of a porous and gas-permeable aggregate of a skeletal ingredient having refractory and electrical-insulating properties, with a remarkable improvement in sensitivity and accuracy. Determination of mixture samples for their respective components is also effected without any preceding separating step.
    Type: Grant
    Filed: October 12, 1978
    Date of Patent: May 12, 1981
    Assignee: Shionogi & Co., Ltd.
    Inventors: Yuzo Nakagawa, Kouji Iwatani, Tetsuro Kadono