Patents by Inventor Masamitsu Muramatsu

Masamitsu Muramatsu 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 detecting embrittlement of heat-resisting steel
    Patent number: 4518464
    Abstract: A method of detecting embrittlement of a heat-resisting steel comprises evaluating the brittleness of the heat-resisting steel on the basis of the repassivation current value obtained by (a) connecting the steel as the anode of an anode polarization curve measuring apparatus wherein an aqueous solution containing an organic acid and an alkylbenzene sulfonic acid or its salt is used as an electrolytic solution; and (b) raising the anode potential from an active region to a passive region and thereafter lowering the anode potential to measure the repassivation current value.
    Type: Grant
    Filed: July 5, 1984
    Date of Patent: May 21, 1985
    Assignees: Kabushiki Kaisha Toshiba, Hideaki Takahashi, Tetsuo Shoji
    Inventors: Hideaki Takahashi, Tetsuo Shoji, Kiyoshi Saitoh, Masamitsu Muramatsu, Kazushige Kimura