Patents by Inventor Toshiichi Iwamoto

Toshiichi Iwamoto 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).

  • Lightweight magnesia clinker and process for the preparation of the same
    Patent number: 4927611
    Abstract: A lightweight magnesia clinker containing magnesium oxide in an amount of more than 85 wt. % and having an apparent porosity of more than 40 vol. % and a bulk specific gravity of less than 2.0 g/cm.sup.3 is disclosed. In the lightweight magnesia clinker, the amount of magnesia clinker particles having a particle diameter of smaller than 3 mm is more than 90 wt. % of the amount of all magnesia clinker particles, and the amount of pores formed in the magnesia clicker particles having a pore size of smaller than 50 .mu.m is more than 90 vol. % of the amount of all pores. A process for the preparation of said lightweight magnesia clinker is also disclosed.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: May 22, 1990
    Assignee: UBE Chemical Industries, LTD.
    Inventors: Kosei Yamamoto, Akira Kaneyasu, Toshiichi Iwamoto