Patents by Inventor Mikio Tsukahara

Mikio Tsukahara 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).

  • Casting stalk
    Patent number: 5558801
    Abstract: The core of the stalk is a metallic cylindrical body 1, such as a steel pipe. On an inner surface of the cylindrical body are layered a boron nitride coating 4, a mica sheet 6 which is airtight and thermal insulating, and a thermal insulating layer 7. On the outer surface of metallic cylindrical body 1 are layered a boron nitride coating 5, a wire gauze 10, a thermal insulating layer 12, a ceramic paper 13, and another boron nitride coating 15. The cylindrical body can be formed by a steel pipe is easily corroded and eroded by molten metal.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: September 24, 1996
    Assignees: Nichias Corporation, Ohta Kasei Corporation
    Inventors: Mikio Tsukahara, Noboru Ohishi, Hisao Taguchi, deceased