Patents by Inventor Noriyuki Hirosawa

Noriyuki Hirosawa 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).

  • Sensor for electrochemical measurement and method for diagnosing corrosion protective properties of metal surface coating by using the sensor
    Patent number: 4962360
    Abstract: A sensor for electrochemical measurement is disclosed which includes a chamber made of an electrically insulative material and having an open end portion, a super absorbent polymer material filled in the chamber and absorbing at a selected rate a liquid electrolyte, an electrode disposed in the chamber, and a screen which covers the open end portion of the chamber and which prevents the super absorbent polymer material from dropping out from the chamber but permits the liquid electrolyte to transmit through the screen. A method is also disclosed which uses the sensor to measure the degree of degradation of a coating film on metal or the corrosion protective properties of a rust film created on the surface of steel.
    Type: Grant
    Filed: May 22, 1989
    Date of Patent: October 9, 1990
    Assignee: Nippon Steel Corporation
    Inventors: Koji Homma, Hiroshi Kihira, Satoshi Ito, Kazumi Matsuoka, Noriyuki Hirosawa