Patents by Inventor Akinori Maruta

Akinori Maruta 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).

  • Patent number: 4800134
    Abstract: A plated composite steel strip having a high corrosion resistance comprises a steel strip substrate, a base electroplating layer comprising a Zn or Zn alloy matrix, substantially water-insoluble chromate particles, and additional fine or colloidal particles of SiO.sub.2, TiO.sub.2, Cr.sub.2 O.sub.3, Al.sub.2 O.sub.3, ZrO.sub.2,SnO.sub.2 and/or Sb.sub.2 O.sub.5, and optionally, an additional electroplating layer formed on the base layer and consisting of Zn, Fe, Co, Ni, Mn and/or Cr and/or a surface coating layer containing at least an organic resinous surface layer and formed on the base, or an additional electroplating layer.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: January 24, 1989
    Inventors: Teruaki Izaki, Makoto Yoshida, Masami Osawa, Seijun Higuchi, Akinori Maruta
  • Patent number: 4784731
    Abstract: A chromate treatment of metal coated steel sheets comprising subjecting the sheets to a cathodic electrolytic treatment to form a chromate film thereon and subjecting the sheet to an anodic electrolytic treatment to form an anodic electrolytic film on the chromate film and to convert the chromate film. The treatment is applicable to various metal coated steel sheets, such as those coated with zinc, zinc alloy, aluminum, aluminum alloy, lead and lead alloy, and is effective to improve the corrosion resistance of the sheets, the quality of paint coating applied on the sheets and the adaptability of the sheets to a cation electro-deposition paint coating.
    Type: Grant
    Filed: May 12, 1987
    Date of Patent: November 15, 1988
    Assignee: Nippon Steel Corporation
    Inventors: Seijun Higuchi, Akinori Maruta, Kenichi Asakawa, Akimitsu Fukuda, Haruyoshi Terada, Youji Ono