Patents by Inventor Fumio Asakawa

Fumio Asakawa 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).

  • Method of performing continuous on-line laser emission spectroscopic analysis on a flowing fluid sample by laser and apparatus therefor
    Patent number: 4652128
    Abstract: A focusing lens having a focal length f is provided at a position spaced a distance L apart from a substance to be measured in the fluid state, the relationship between L and f is controlled, so that the formula:0.95f.ltoreq.L.ltoreq.1.05fis constantly satisfied, and the light emitted when a high output pulse laser irradiates the surface of the substance to be measured is analyzed spectroscopically so that the influence of variations on the surface of the substance to be measured can be avoided and a stabilized laser emission spectroscopically analysis on-line can be conducted as the substance to be measured flows.
    Type: Grant
    Filed: December 13, 1984
    Date of Patent: March 24, 1987
    Assignees: Kawasaki Steel Corporation, Japan Spectroscopic Co., Ltd, Spectral Instrument Co.
    Inventors: Kouzou Tsunoyama, Wataru Tanimoto, Yoshiharu Ohashi, Shigeyuki Kimura, Fumio Asakawa