Patents by Inventor Hisatomi Muraki

Hisatomi Muraki 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).

  • Anti-oxidant agent for continuous annealing of stainless steel strip and anti-oxidation method using the same
    Patent number: 5234507
    Abstract: An anti-oxidation agent for preventing oxidation of a stainless steel strip during continuous annealing comprising a colloidal inorganic substance which can be crystallized at a temperature not higher than 1300.degree. C. at least one compound having a melting point not higher than 1300.degree. C., selected from the group consisting of silicates, borates and phosphates, a dispersion agent, and the balance substantially water. The anti-oxidation agent is applied to the surface of the stainless steel strip. During the annealing, the anti-oxidation agent enhances the heat absorption so that the stainless steel strip temperature is elevated to the annealing temperature in a short time. The anti-oxidation agent on the strip surface forms a film of a fine structure which keeps the strip surface away from oxidizing components of the annealing atmosphere so as to suppress generation of oxide scale. The film is easily separated due to thermal contraction in the course of the cooling after the annealing.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: August 10, 1993
    Assignee: Kawasaki Steel Corporation
    Inventors: Kuniaki Sato, Genichi Ishibashi, Yasuhiro Katsuki, Hiroyuki Kaito, Hisatomi Muraki, Yoshiharu Yamaguchi