Patents by Inventor Hitoshi Ohsugi

Hitoshi Ohsugi 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 degassing and decarburizing stainless molten steel
    Patent number: 5356456
    Abstract: A method of degassing and decarburizing molten stainless steel in a vacuum, which molten steel is produced in a steel making furnace. Molten steel is foamed in a vacuum tank. Before foaming the [N] (%) in the molten steel is increased. The foam is produced by denitrification of the steel during vacuum degassing. Oxidizing gas is blown through a top-blow lance onto the surface of the steel in a vacuum tank, causing the reaction C+1/2O.sub.2 .fwdarw.CO to decarbonize the steel. Temperature decrease of the molten steel is resisted by combustion of CO produced by the reaction of C+1/2O.sub.2 .fwdarw.CO.
    Type: Grant
    Filed: October 5, 1993
    Date of Patent: October 18, 1994
    Assignee: Kawasaki Steel Corporation
    Inventors: Hiroshi Nishikawa, Masanori Nishikohri, Hitoshi Ohsugi
  • Process for fusing steel slabs in longitudinal direction thereof
    Patent number: 4955126
    Abstract: A process for fusing a steel slab in a longitudinal direction thereof is disclosed, wherein when the steel slab is fused in the longitudinal direction at more than 500.degree. C. and at a speed of more than 300 mm/min., a surface portion of the slab including at least a lower portion of a longitudinally fused surface portion thereof is mechanically removed by cutting or grinding.
    Type: Grant
    Filed: April 20, 1989
    Date of Patent: September 11, 1990
    Assignee: Kawasaki Steel Corporation
    Inventors: Masaru Shibata, Masayuki Onishi, Hitoshi Ohsugi, Shigeru Ogura, Masaru Washio, Hideo Kuguminato, Yoshiaki Hara