Patents by Inventor Hiroaki Koyasu

Hiroaki Koyasu 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).

  • Chrome-plated part and manufacturing method of the same
    Patent number: 9650722
    Abstract: An nickel plating layer (5a) intended for corrosion current distribution is formed over a body (2), and a 0.05 to 2.5 micrometers thick surface chrome plating layer (6) made of trivalent chromium is formed on the surface thereof using basic chromium sulfate as a source of metal. Further on the same, a not less than 7 nm thick chromium compound film (7) is formed by cathode acidic electrolytic chromatin. The corrosion distribution nickel plating layer (5a) has a function of forming a microporous structure, a microcrack structure, or the both of the same in the surface chrome plating layer (6).
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: May 16, 2017
    Assignees: NISSAN MOTOR CO., LTD., ATOTECH DEUTSCHLAND GMBH
    Inventors: Soichiro Sugawara, Hiroaki Koyasu, Hiroshi Sakai, Jens-Eric Geissler, Grant Keers
  • CHROME-PLATED PART AND MANUFACTURING METHOD OF THE SAME
    Publication number: 20140284218
    Abstract: An nickel plating layer (5a) intended for corrosion current distribution is formed over a body (2), and a 0.05 to 2.5 micrometers thick surface chrome plating layer (6) made of trivalent chromium is formed on the surface thereof using basic chromium sulfate as a source of metal. Further on the same, a not less than 7 nm thick chromium compound film (7) is formed by cathode acidic electrolytic chromatin. The corrosion distribution nickel plating layer (5a) has a function of forming a microporous structure, a microcrack structure, or the both of the same in the surface chrome plating layer (6).
    Type: Application
    Filed: June 3, 2014
    Publication date: September 25, 2014
    Applicants: NISSAN MOTOR CO., LTD., ATOTECH DEUTSCHLAND GMBH
    Inventors: Soichiro Sugawara, Hiroaki Koyasu, Hiroshi Sakai, Jens-Eric Geissler, Grant Keers
  • CHROME-PLATED PART AND MANUFACTURING METHOD OF THE SAME
    Publication number: 20110117380
    Abstract: An nickel plating layer (5a) intended for corrosion current distribution is formed over a body (2), and a 0.05 to 2.5 micrometers thick surface chrome plating layer (6) made of trivalent chromium is formed on the surface thereof using basic chromium sulfate as a source of metal. Further on the same, a not less than 7 nm thick chromium compound film (7) is formed by cathode acidic electrolytic chromatin. The corrosion distribution nickel plating layer (5a) has a function of forming a microporous structure, a microcrack structure, or the both of the same in the surface chrome plating layer (6).
    Type: Application
    Filed: August 27, 2008
    Publication date: May 19, 2011
    Inventors: Soichiro Sugawara, Hiroaki Koyasu, Hiroshi Sakai, Jens-Eric Geissler, Grant Keers