Patents Represented by Law Firm Birch, Stewart et al
  • 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