Patents by Inventor Heizi Tabuchi

Heizi Tabuchi 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).

  • Electrofusion method of producing boron aluminum oxide refractory
    Patent number: 4226629
    Abstract: A refractory material, which comprises 78-94 Wt % of Al.sub.2 O.sub.3 and 15-6 Wt % of B.sub.2 O.sub.3 to have 9Al.sub.2 O.sub.3.2B.sub.2 O.sub.3 phase and is highly resistant to spalling and corrosion by a B.sub.2 O.sub.3 -containing vapor, is produced by electrofusion of a powder mixture of Al.sub.2 O.sub.3 and B.sub.2 O.sub.3 with the addition of at least one alkali metal oxide or carbonate to adequately lower the electrical resistance of the material. The amount of the alkali metal compound is controlled so that the product may not contain more than 2 Wt % of Li.sub.2 O, Na.sub.2 O and/or K.sub.2 O thereby to accomplish the object without adversely affecting the spalling and corrosion resistance of the product.
    Type: Grant
    Filed: May 8, 1979
    Date of Patent: October 7, 1980
    Assignee: Central Glass Company, Limited
    Inventors: Heizi Tabuchi, Toshiaki Itoh