Patents by Inventor Kozi Iwase

Kozi Iwase 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).

  • Continuous annealing method for cold reduced steel strip
    Patent number: 4323403
    Abstract: In a continuous annealing process for a cold reduced steel strip substantially including a rapid cooling stage and a carbon precipitation treating stage into said process, the rapid cooling rate which is obtained by initial heating to above the recrystallization temperature and then slowly cooled for about 100 seconds to be above 200.degree. C./sec; and the starting temperature is controlled to be between 500.degree. C. and lower than 600.degree. C., thereby to obtain good press-formability of the continuously annealed steel strip.
    Type: Grant
    Filed: July 23, 1979
    Date of Patent: April 6, 1982
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Kazuhide Nakaoka, Kenzi Araki, Kozi Iwase, Haruo Kubotera, Takao Kurihara, Nobuo Tanaka
  • Method of making cold-reduced Al-killed steel strip for press-forming by continuous casting and continuous annealing process
    Patent number: 4113517
    Abstract: When an Al-killed steel consisting of, specially, 0.005% .ltoreq. [N] .ltoreq. 0.007%; 10 .times. [N] .ltoreq. Sol.Al. .ltoreq. 0.12%; and the ratio Sol.Al.%/[N]% controlled within the range of 10 to 20, is continuously cast, hot rolled, coiled at a high temperature, cold reduced and finally continuously annealed under special requirements, the steel strip is not at all inferior to the commercial base strip in mechanical properties and is made under high productivity and exhibits excellent uniformity in qualities.
    Type: Grant
    Filed: August 12, 1976
    Date of Patent: September 12, 1978
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Kazuhide Nakaoka, Kenzi Araki, Akihiko Nishimoto, Kozi Iwase, Haruo Kubotera