Patents by Inventor Shoji Shijima

Shoji Shijima 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 producing highly corrosion resistant tin-plated steel sheet
    Patent number: 4104135
    Abstract: A method of producing a highly corrosion resistant tin-plated steel sheet is disclosed by which a metal or alloy coating having a thickness from 0.005.mu. to 0.5.mu. and selected from the class consisting of Ni, Cu and Ni-Sn alloy is plated upon a steel sheet. The thus plated steel sheet is heated in a non-oxidizing atmosphere to such an extent that said plated coating is penetrated and diffused into the steel sheet whereby a reformed steel sheet surface where said plating coating is disappeared is secured. A tin coating is then plated upon said reformed steel sheet surface. This reformed steel sheet surface is sandwiched between the plating tin coating and the steel sheet and contributes greatly to corrosion resistant property of the tin-plated steel sheet.
    Type: Grant
    Filed: August 4, 1975
    Date of Patent: August 1, 1978
    Assignee: Kawasaki Steel Corporation
    Inventors: Taketoshi Fujimaki, Shoji Shijima, Shunichi Harada