Patents by Inventor Yasutoshi Nanba

Yasutoshi Nanba 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).

  • Multi-stepped submerged nozzle for continuous casting
    Patent number: 5328064
    Abstract: The nozzle for continuous casting has a plurality of steps in the molten steel pouring hole of the nozzle. The dimension of the inside diameters of the steps to the inside diameter d of the main pipe is d.sub.1 >d.sub.2 >d or d.sub.1 >d.sub.2 d.sub.3 >d, the inside diameter d.sub.2 or d.sub.3 immediately above the molten steel pouring outlet is d+10 mm.gtoreq.d.sub.2 or d.sub.3, and the material of the inner peripheral wall near the pouring outlet is boron nitride-carbon.
    Type: Grant
    Filed: October 21, 1992
    Date of Patent: July 12, 1994
    Assignee: Shinagawa Refractories Co., Ltd.
    Inventors: Yasutoshi Nanba, Kozo Kanamaru, Yukinobu Kurashina