Patents by Inventor Tom R. Shrout

Tom R. Shrout 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).

  • Ceramic compositions for microwave wireless communication
    Patent number: 6034015
    Abstract: A composition of Ba.sub.2 Ti.sub.9 O.sub.20 suitable for use in microwave wireless communications is provided. Ba.sub.2 Ti.sub.9 O.sub.20 doped with Zr is formed by combining starting materials containing barium, titanium and zirconium. In a preferred embodiment of the invention, zirconium-doped Ba.sub.2 Ti.sub.9 O.sub.20 is formed by combining BaCO.sub.3 and TiO.sub.2, and substituting an appropriate amount of ZrO.sub.2 for a portion of the TiO.sub.2. The relative proportion of Ba.sub.2 Ti.sub.9 O.sub.20 obtained as a result is increased over that which may be obtained using other dopants, such as tin (Sn). Forming Ba.sub.2 Ti.sub.9 O.sub.20 with a Zr dopant in the appropriate amount also results in greater stability of the dielectric constant, an increase in the quality factor, and a decrease in the temperature coefficient than exhibited by other compositions of Ba.sub.2 Ti.sub.9 O.sub.20 that lack a Zr dopant.
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: March 7, 2000
    Assignee: Georgia Tech Research Corporation
    Inventors: Wen-Yi Lin, Robert F. Speyer, Tom R. Shrout, Wesley S. Hackenberger