Patents by Inventor Akira AKAGI

Akira AKAGI 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).

  • Non-oriented electrical steel sheet and method for producing same
    Patent number: 11948710
    Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention is a non-oriented electrical steel sheet including a base metal steel sheet and a composite coating film that is formed on surfaces of the base metal steel sheet and includes Zn-containing phosphate and an organic resin, wherein the non-oriented electrical steel sheet contains crystalline aluminum phosphate showing diffraction lines belonging to ICDD No. 01-074-3256 when the composite coating film is measured by a wide-angle X-ray diffraction method.
    Type: Grant
    Filed: March 30, 2022
    Date of Patent: April 2, 2024
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hiroyasu Fujii, Jun Maki, Kazutoshi Takeda, Akira Akagi, Yuya Fujii
  • NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PRODUCING SAME
    Publication number: 20230395291
    Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention is a non-oriented electrical steel sheet including a base metal steel sheet and a composite coating film that is formed on surfaces of the base metal steel sheet and includes Zn-containing phosphate and an organic resin, wherein the non-oriented electrical steel sheet contains crystalline aluminum phosphate showing diffraction lines belonging to ICDD No. 01-074-3256 when the composite coating film is measured by a wide-angle X-ray diffraction method.
    Type: Application
    Filed: March 30, 2022
    Publication date: December 7, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Hiroyasu FUJII, Jun MAKI, Kazutoshi TAKEDA, Akira AKAGI, Yuya FUJII
  • NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PRODUCING SAME
    Publication number: 20230033301
    Abstract: A non-oriented electrical steel sheet according to one embodiment of the present invention includes a base metal steel sheet, and a composite coating film composed of a Zn-containing phosphate and an organic resin, the composite coating film being formed on a surface of the base metal steel sheet, wherein: a content of Zn in the composite coating film is 10 mg/m2 or more per side; and the product of an amount of oxygen in the base metal steel sheet and a sheet thickness of the base metal steel sheet is 50 ppm·mm or less.
    Type: Application
    Filed: November 20, 2020
    Publication date: February 2, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Hiroyasu FUJII, Jun MAKI, Kazutoshi TAKEDA, Akira AKAGI, Hiroyuki MIMURA
  • Insulating coating for electrical steel sheet
    Patent number: 11332831
    Abstract: An insulating coating for an electrical steel sheet is provided that is formed on a surface of a base metal of the electrical steel sheet and that contains a polyvalent metal phosphate of one or more elements selected from Al, Zn, Mg and Ca, and has an enriched layer of a divalent metal at an interface with the surface of the base metal. An enrichment of the divalent metal contained in the enriched layer is 0.01 g/m2 or more and less than 0.2 g/m2.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: May 17, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Shuichi Yamazaki, Masaru Takahashi, Kazutoshi Takeda, Hiroyasu Fujii, Akira Akagi, Hiroki Hori
  • INSULATING COATING FOR ELECTRICAL STEEL SHEET
    Publication number: 20180155840
    Abstract: An insulating coating for an electrical steel sheet is provided that is formed on a surface of a base metal of the electrical steel sheet and that contains a polyvalent metal phosphate of one or more elements selected from Al, Zn, Mg and Ca, and has an enriched layer of a divalent metal at an interface with the surface of the base metal. An enrichment of the divalent metal contained in the enriched layer is 0.01 g/m2 or more and less than 0.2 g/m2.
    Type: Application
    Filed: April 25, 2016
    Publication date: June 7, 2018
    Inventors: Shuichi YAMAZAKI, Masaru TAKAHASHI, Kazutoshi TAKEDA, Hiroyasu FUJII, Akira AKAGI, Hiroki HORI