Patents by Inventor Toshitomo Sugiyama

Toshitomo Sugiyama 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).

  • Apparatus for improvement of iron loss of electromagnetic steel sheet or amorphous material
    Patent number: 4846448
    Abstract: A process and an apparatus for improving iron loss of electromagnetic steel sheet or amorphous material are disclosed. In this case, the steel sheet or amorphous material is subjected to an irradiation of plasma flame under specified conditions.
    Type: Grant
    Filed: June 22, 1988
    Date of Patent: July 11, 1989
    Assignee: Kawasaki Steel Corporation
    Inventors: Bunjiro Fukuda, Toshitomo Sugiyama, Keiji Sato, Atsuhito Honda
  • Process and apparatus for improvement of iron loss of electromagnetic steel sheet or amorphous material
    Patent number: 4772338
    Abstract: A process and an apparatus for improving iron loss of electromagnetic steel sheet or amorphous material are disclosed. In this case, the steel sheet or amorphous material is subjected to an irradiation of plasma flame under specified conditions.
    Type: Grant
    Filed: October 21, 1986
    Date of Patent: September 20, 1988
    Assignee: Kawasaki Steel Corporation
    Inventors: Bunjiro Fukuda, Toshitomo Sugiyama, Keiji Sato, Atsuhito Honda
  • Method of producing grain-oriented silicon steel sheets having substantially no glass film
    Patent number: 4255205
    Abstract: A grain-oriented silicon steel sheet having substantially no glass film can be obtained by subjecting a cold rolled silicon steel sheet having a final gauge to a decarburization annealing to form subscale on the steel sheet surface, applying an annealing separator consisting of hydrated silicate mineral fine powder, a strontium- or barium-containing compound, calcium oxide or calcium hydroxide and the remainder being Al.sub.2 O.sub.3, and finally annealing the above treated steel sheet. The steel sheet has excellent punchability when the steel sheet is coated with a phosphate system or chromate-organic resin mixture system insulating coating.
    Type: Grant
    Filed: December 12, 1979
    Date of Patent: March 10, 1981
    Assignee: Kawasaki Steel Corporation
    Inventors: Nobuyuki Morito, Toshitomo Sugiyama, Yoshio Obata
  • Method of forming an insulating film on a grain-oriented silicon steel sheet
    Patent number: 4242155
    Abstract: A highly adhesive and uniform insulating film can be formed on a grain-oriented silicon steel sheet without deteriorating the iron loss of the steel sheet by the use of a magnesia series annealing separator containing a strontium compound.
    Type: Grant
    Filed: April 23, 1979
    Date of Patent: December 30, 1980
    Assignee: Kawasaki Steel Corporation
    Inventors: Nobuyuki Morito, Toshitomo Sugiyama, Yasuo Yokoyama, Toshio Ichida
  • Method for forming an insulating glass film on a grain-oriented silicon steel sheet having a high magnetic induction
    Patent number: 3930906
    Abstract: An insulating glass film having an excellent uniformity and a high adhesion to a grain-oriented silicon steel sheet having a high magnetic induction is formed by annealing a coil of a cold rolled silicon steel sheet having a final gauge in an annealing furnace under a non-oxidizing and non-reducing neutral inert gas, such as nitrogen or argon at a constant temperature keeping stage of 800.degree.-920.degree.C and then under dry hydrogen at a temperature of 1,000.degree.-1,200.degree.C in the final annealing stage.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: January 6, 1976
    Assignee: Kawasaki Steel Corporation
    Inventors: Toshio Irie, Yasuo Yokoyama, Toshitomo Sugiyama, Hiroshi Shimanaka, Shigeru Kobayashi