Patents by Inventor Mitsunori Kusumoto

Mitsunori Kusumoto 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).

  • Boron nitride ceramics and molten metal container provided with members made of the same ceramics
    Patent number: 5308044
    Abstract: The present invention relates to ceramics having excellent fusing damage resistivity against melt of metal or other inorganic materials. If a member formed of BN ceramics in the prior art comes into contact with melt of metal, glass or the like, the member would be readily fused and damaged at its contact portion. Hence, if AlN in the range of 1.ltoreq.AlN<50 weight % is added to BN ceramics containing 50 weight % or more of BN component, the fusing damage resistivity is greatly improved. Furthermore, Y.sub.2 O.sub.3 whose weight proportion relative to AlN content is 1.0-10.0%, is added, strength of the BN ceramics is greatly improved. A protective cap for a thermocouple formed of the ceramics according to the present invention is excellent in durability against molten metal, and so, continuous temperature measurement for molten metal is possible.
    Type: Grant
    Filed: August 14, 1991
    Date of Patent: May 3, 1994
    Assignee: Kabushiki Kaisha Kouransha
    Inventors: Masazumi Nakashima, Mitsunori Kusumoto, Sumihiko Kurita, Hiroshi Nakamura, Katsumi Ura, Akira Murata