Patents by Inventor Masahito Hanao

Masahito Hanao 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).

  • Mold powder for continuous casting and method of continuous casting
    Patent number: 6125919
    Abstract: A mold powder for continuous steel casting, contains CaO, SiO.sub.2 and fluoride as the main components. The ratio by weight of CaO', represented by the following equation, to SiO.sub.2 is 0.9-2.8 and the CaF.sub.2 content is about 5-60 wt. %. The powder contains Na.sub.2 O in an amount of 0-25 wt. % and C in an amount of 0-10 wt. %.CaO'=T.CaO-F.times.(56/38)wherein T.CaO represents the total Ca content in the mold powder as converted to CaO(wt. %) and F represents the total F content in the mold powder(wt. %). The powder is used in a method for continuous steel casting.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: October 3, 2000
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Masahito Hanao, Masayuki Kawamoto, Yoshinori Tanizawa, Seiji Kumakura