Patents by Inventor Takajiro Shimohira

Takajiro Shimohira 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).

  • Aluminosilicate glass containing Y.sub.2 O.sub.3 concentrate and ZrO.sub.2
    Patent number: 4530909
    Abstract: A process for preparing aluminosilicate glass comprising from 30 to 60 molar % of SiO.sub.2, from 20 to 35 molar % of Al.sub.2 O.sub.3 and from 10 to 30 molar % of a total of rare earth oxides composed mainly of Y.sub.2 O.sub.3, wherein an yttrium concentrate is used as the rare earth oxides composed mainly of Y.sub.2 O.sub.3, and ZrO.sub.2 not in excess of 8 molar % to improve alkali resistance.
    Type: Grant
    Filed: October 19, 1984
    Date of Patent: July 23, 1985
    Assignee: National Institute for Researches in Inorganic Materials
    Inventors: Akio Makishima, Tatsuya Nagata, Takajiro Shimohira