Patents by Inventor Hirokuni Itoh

Hirokuni Itoh 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 for measuring the contamination profile of the inner surfaces of radioactively contaminated pipes
    Patent number: 5881116
    Abstract: In a method of measuring the contamination profile of the inner surfaces of a radioactively contaminated pipe embedded within a concrete structure in a nuclear reactor facility, the detecting surface of a detector to be inserted into the contaminated pipe is fitted with a movable shield plate or cover, which is moved by a specified distance and the radioactive contamination profile within a limited area of the inner surfaces of the pipe is measured in terms of the difference in radiation intensity measured in two states, one where the shield plate or cover is in contact with the detecting surface and the other where it is spaced from the latter.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: March 9, 1999
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Mutsuo Hatakeyama, Hirokuni Itoh, Satoshi Yanagihara