Patents by Inventor Shigeto Fujii

Shigeto Fujii 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).

  • Process for manufacturing galvanized steel sheet by nickel pre-coating method
    Patent number: 5312531
    Abstract: Process for manufacturing a galvanized steel sheet, comprising steps of coating a steel sheet with nickel in an amount of from 0.2 to 2 g/m.sup.2, heating the steel sheet thus coated to a temperature within the range of from 420.degree. C. to 500.degree. C. in a non-oxidative atmosphere, and dipping the nickel coated steel sheet into a molten zinc bath containing aluminum at a content of from 0.1 to 1% without contact with air, wherein the steel sheet is dipped into the molten zinc bath within 15 seconds after the temperature of the steel sheet exceeds 350.degree. C. in the heating step.
    Type: Grant
    Filed: December 16, 1992
    Date of Patent: May 17, 1994
    Assignee: Nippon Steel Corporation
    Inventors: Kazumi Nishimura, Hisao Odashima, Tetsuya Ohara, Ryohei Mizoguchi, Shigeto Fujii
  • Process for manufacturing galvanized steel sheet by nickel pre-coating method
    Patent number: 5203985
    Abstract: Process for manufacturing a galvanized steel sheet, comprising steps of coating a steel sheet with nickel in an amount of from 0.2 to 2 g/m.sup.2, heating the steel sheet thus coated to a temperature within the range of from 420.degree. C. to 500.degree. C. in a non-oxidative atmosphere, and dipping the nickel coated steel sheet into a molten zinc bath containing aluminum at a content of from 0.1 to 1% without contract with air, wherein the steel sheet is dipped into the molten zinc bath within 15 seconds after the temperature of the steel sheet extends 350.degree. C. in the heating step.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: April 20, 1993
    Assignee: Nippon Steel Corporation
    Inventors: Kazumi Nishimura, Hisao Odashima, Tetsuya Ohara, Ryohei Mizoguchi, Shigeto Fujii