Patents by Inventor Hitoshi Iwado

Hitoshi Iwado 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).

  • Carbon containing refractory
    Patent number: 4830992
    Abstract: A carbon containing refractory comprising, by weight: 5 to 60% of AZT clinker mainly constituted by ZrO.sub.2, Al.sub.2 O.sub.3, TiO.sub.2 and SiO.sub.2 ; 3 to 40% of a carbon source; and the balance being at least one or two refractories selected from a group consisting of alumina, magnesia, zirconia, mullite, spinel, calcia, and fused quartz.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: May 16, 1989
    Assignee: Shinagawa Refractories Co., Ltd.
    Inventors: Kenji Ichikawa, Noboru Tsukamoto, Hitoshi Iwado, Eishi Iida