Patents by Inventor Yoshiyuki Nobuoka

Yoshiyuki Nobuoka 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).

  • Taphole mix for molten metal taphole
    Patent number: 5962357
    Abstract: The object of the present invention is to provide a taphole mix for use in a molten metal taphole which has improved resistance to both wear and corrosion and enables prolonged tapping of iron and reduces difficult drilling. The taphole mix of the present invention is characterized in that it comprises a refractory base material in an amount of 65 to 92 wt % and a binder in an amount of 8 to 35 wt %, the binder consisting of an anhydrous coal tar having a fixed carbon content of 32.5 wt % or above.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: October 5, 1999
    Assignee: Shinagawa Refractories Co., Ltd.
    Inventors: Yukitoshi Kubota, Hidetoshi Wada, Yoshiyuki Nobuoka