Patents by Inventor Katsuyoshi Kajiyama

Katsuyoshi Kajiyama 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).

  • Process for manufacturing high tensile steel wire
    Patent number: 4604146
    Abstract: A process for manufacturing a high tensile steel wire, characterized by comprising the steps of pre-cooling a hot-rolled steel rod to a temperature between 750.degree.-900.degree. C. by means of a cooling apparatus provided between a group of intermediate rolling mills and a group of finishing rolling mills in a hot rolling line for steel rod, finishing rolling the thus pre-cooled steel rod, quenching the hot rolled steel rod to a temperature of 700.degree. C. or lower to provide a supercooled austenite phase, then finishing-cooling the thus quenched rod to provide martensite, and drawing the resulting steel rod with roller dies without descaling is disclosed.
    Type: Grant
    Filed: November 7, 1983
    Date of Patent: August 5, 1986
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Akira Aida, Tetsu Ohno, Takashi Fukuda, Kenji Aihara, Takuo Mizoguchi, Syozi Nishimura, Katsuyoshi Kajiyama