Patents by Inventor Akiro Matsuzaki

Akiro Matsuzaki 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).

  • PHOSPHATE-TREATED GALVANIZED STEEL SHEET AND METHOD FOR MAKING THE SAME
    Publication number: 20090242080
    Abstract: A method for making a phosphate-treated galvanized steel sheet, including forming a phosphate film on the surface of a galvanized layer of a galvanized steel sheet using a phosphate treatment solution containing Zn2+ and Mg2+ so as to satisfy 2.0<Zn2+?5.0 g/L, 2.0?Mg2+?5.0 g/L, and 0.4?Mg2+/Zn2+?2.5, and satisfying 0.020?free acidity/total acidity<0.10. The making method allows the quick formation of a uniform phosphate film, whereby a phosphate-treated galvanized steel sheet having excellent corrosion resistance and blackening resistance is obtained.
    Type: Application
    Filed: October 31, 2007
    Publication date: October 1, 2009
    Inventors: Satoru Ando, Chiyoko Tada, Hiroki Nakamaru, Kenichi Sasaki, Nobue Fujibayashi, Akiro Matsuzaki