Patents by Inventor Masanori Nishikohri

Masanori Nishikohri 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