Patents by Inventor Nobuteru Sawayama

Nobuteru Sawayama 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).

  • Corrosion inspection plate, measurement for corrosive environment and case for the corrosion inspection plate
    Patent number: 5804140
    Abstract: An apparatus for measuring the amount of various corrosive gases present in a corrosive environment, which uses a metal plate having a thin metalic film thereon formed by sputtering or deposition, instead of the conventional hand made metal sheet, and which measures the thickness of a corrosion film formed on the metal film by utilizing an X-ray spectrum instead of the conventional cathode reduction method, and without destroying the corrosion film, through use of a calibration curve. The invention also provides a novel casing for holding the metal plate in the corrosive environment during measurement.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: September 8, 1998
    Assignee: Yokogawa Engineering Service Corporation
    Inventors: Tadashi Kishi, Xinmin Xu, Nobuteru Sawayama