Patents by Inventor Tatsuo Kawakami

Tatsuo Kawakami 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).

  • Magnesia-calcium oxide refractories
    Patent number: 4923831
    Abstract: Disclosed are a magnesia-calcium oxide refractory product comprising (i) about 100 parts by weight of a refractory aggregate consisting essentially of about 20 to about 95% by weight of MgO and about 80 to about 5% by weight of CaO and (ii) about 0.5 to about 5 parts by weight of aragonite-type calcium carbonate, and a process for preparing the same.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: May 8, 1990
    Assignee: Kawasaki Refractories Company Ltd.
    Inventors: Nobuyuki Uzaki, Hiroaki Ishii, Ichiro Tsuchiya, Yukio Oguchi, Tatsuo Kawakami