Patents by Inventor Tatsuhiko Saitoh

Tatsuhiko Saitoh 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).

  • Method for producing rare earth element-doped glass by sol-gel process
    Patent number: 5196383
    Abstract: A rare earth element-doped glass in which the rare earth element is homogeneously doped is produced by a method coprises hydrolyzing a metal alkoxide of the formula:M(OR).sub.4wherein M is a metal and R is an alkyl group in a liquid medium selected from the group consisting of alcohols and water in the presence of a compound of a rare earth element and condensing the hydrolyzed material to form a rare earth element-doped glass.
    Type: Grant
    Filed: November 9, 1990
    Date of Patent: March 23, 1993
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Masumi Ito, Tatsuhiko Saitoh, Hiroshi Yokota