Patents by Inventor Naraharu Yamamoto

Naraharu Yamamoto 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 treating ferruginous slags
    Patent number: 4141722
    Abstract: The disclosure is of a method of treating ferruginous metallurgical slags to lower basicity, stabilize their composition, reduce their melting point and stabilize the slag in regard to dusting and slaking. The stabilized slag is useful as an artificial sand or as an aggregated sand useful in the manufacture of concrete and like compositions.
    Type: Grant
    Filed: January 24, 1977
    Date of Patent: February 27, 1979
    Assignee: Osaka Iron & Steel Co., Ltd.
    Inventors: Kiyoshi Takai, Naraharu Yamamoto, Seiichi Yamamoto