Patents by Inventor C. John Yu

C. John Yu 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).

  • Bi-Ca-Sr-Cu-Zn-O superconducting glass-ceramics
    Patent number: 5059560
    Abstract: A glass-ceramic superconductor is disclosed, having a nominal stoichiometric composition consisting essentially of the oxides of Bi, Ca, Sr, Cu and Zn in the stoichiometric formula range: Bi.sub.2 Ca.sub.x Sr.sub.z Zn.sub.n Cu.sub.w O.sub.y, wherein x ranges about 1-2, z ranges about 1-2, n ranges about 0.001-2, w ranges about 1-2, and y ranges about 6-11. These compositions exhibit greatly improved glass stability, yet can yield highly crystalline superconductors which may include large platelet crystals and which can exhibit very low room temperature resistivity.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: October 22, 1991
    Assignee: Corning Incorporated
    Inventors: M. Grayson Alexander, George H. Beall, Candace J. Quinn, C. John Yu