Patents by Inventor Koji Seto

Koji Seto 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).

  • Publication number: 20190226044
    Abstract: A ferritic stainless steel sheet is a ferritic stainless steel sheet which is temper rolled after bright annealing and has a passivation film. The area ratio of minute defects having an area of 10 ?m2 or more on the surface of the steel sheet is 0.2% or more and 1.5% or less. In addition, the thickness of the passivation film is 1 nm or more and 10 nm or less, the average concentration of Si in the passivation film is 10 at % or more and 20 at % or less, and the average concentration ratio of Si, Al, Cr and Fe in the passivation film component is (Si+Al+Cr)/Fe>1.0.
    Type: Application
    Filed: December 13, 2016
    Publication date: July 25, 2019
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Takafumi KAWAGOE, Teruhiko SUETSUGU, Koji SETO
  • Patent number: 5705017
    Abstract: A method of producing a steel sheet coated with a fluororesin film by heat-fusing the fluororesin film onto a surface of the steel sheet, comprising heating the surface of the steel sheet to a temperature higher by 30-120 degrees C. than a melting point of the fluororesin of the fluororesin film, and contact bonding the fluororesin film onto the steel sheet surface between a pair of rolls, while a surface of a roll facing the fluororesin film, in the pair of rolls, is heated to a temperature lower by 100-210 degrees C. than the melting point of the fluororesin of the fluororesin film.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: January 6, 1998
    Assignee: Kawatetsu Galvanizing Co., Ltd.
    Inventors: Yasuhei Sakamoto, Toshio Irie, Hideshi Fujisawa, Koji Seto, Morimasa Kuroda