Patents by Inventor Yuzo Otsuki

Yuzo Otsuki 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).

  • Patent number: 4646950
    Abstract: A sliding nozzle plate enjoying outstanding stability to resist wear, spalling, corrosion, and particularly loss due to corrosion is produced by preparing a composition consisting of at least one refractory raw material selected from the group consisting of acidic and/or neutral refractory raw materials, carbon, metal powder, and 2 to 50% by weight, based on the total weight of the composition, of coarse and/or medium particles of an alumina-zirconia-titania mixture of 42 to 79.3% by weight of alumina, 20 to 40% by weight of zirconia, 0.5 to 16% by weight of titania, and the balance to make up 100% by weight and not more than 2% by weight of inevitably entrained elements. The composition is required to have a particle size distribution of 30 to 60% by weight of coarse and medium particles and the balance to make up 100% by weight of fine particles and/or fine powder. The composition is kneaded with a binder, molded in a prescribed shape, and subjected to firing in reducing atmosphere.
    Type: Grant
    Filed: October 26, 1984
    Date of Patent: March 3, 1987
    Assignees: Harima Refractory Co., Ltd., Nippon Steel Corporation
    Inventors: Michihiro Gotoh, Tsuyoshi Fujimoto, Nobiru Komatsu, Yuzo Otsuki