Patents by Inventor Yu-Yi Xue

Yu-Yi Xue 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).

  • Generation and applications of negative dielectric constant materials
    Patent number: 7611969
    Abstract: A negative dielectric is induced by the application of a dc bias-electric field in aggregates of oxide nano-particles whose surfaces have been specially treated. The magnitude of the dielectric constant and the frequency where the negative dielectric constant occurs can be adjusted. Such material systems have profound implications in novel devices as well as in science development, e.g. unusual wave propagation, secured communication and ultra-high temperature superconductivity.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: November 3, 2009
    Assignee: University of Houston
    Inventors: Ching-Wu Chu, Feng Chen, Yu-Yi Xue, Jason Shulman, Stephen Tsui
  • Generation and applications of negative dielectric constant materials
    Publication number: 20070109460
    Abstract: A negative dielectric is induced by the application of a dc bias-electric field in aggregates of oxide nano-particles whose surfaces have been specially treated. The magnitude of the dielectric constant and the frequency where the negative dielectric constant occurs can be adjusted. Such material systems have profound implications in novel devices as well as in science development, e.g. unusual wave propagation, secured communication and ultra-high temperature superconductivity.
    Type: Application
    Filed: February 17, 2006
    Publication date: May 17, 2007
    Inventors: Ching-Wu Chu, Feng Chen, Yu-Yi Xue, Jason Shulman, Stephen Tsui
  • High temperature superconducting tape and method of manufacture
    Patent number: 6329325
    Abstract: Highly oriented HgBa2Ca2Cu3O8+&dgr; on Ni-tapes with a buffer layer of Cr/Ag or Cr/(Ag—Pd) have been described with a high transition temperature are described along with, one and two step methods of manufacture.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: December 11, 2001
    Assignee: University of Houston
    Inventors: Ching-Wu Chu, Ruling L. Meng, Yu-Yi Xue
  • Ba-Ca-Cu-O compositions superconducting at up to 126K and methods for making same
    Patent number: 6239080
    Abstract: A material having a superconducting transition temperature (Tc) of 126 K under ambient pressure has been identified. The superconducting material belongs to a Ba—Ca—Cu—O compound family where the cation ratio of Ba:Ca:Cu is 2:2.5+0.5:3.5±0.5. The superconducting material is produced from precursor oxides having nominal formula Ba2Can−1+xCuu/yOx wherein n=3 or 4 and x is 0.4 to 1.0 and y is 0 to 0.8 using high-pressure synthesis. Final synthesis temperature was maintained at less than 950° C. Formation of the superconducting material is sensitive to the state of the precursor oxides, the carbon content of the precursor, and the synthesis temperature, pressure and time.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: May 29, 2001
    Assignee: Thr University of Houston - University Park
    Inventors: Ching-Wu Chu, Yu-Yi Xue, Zhong L. Du
  • High temperature superconducting tape and method of manufacture
    Patent number: 5906964
    Abstract: Highly oriented HgBa.sub.2 Ca.sub.2 Cu.sub.3 O.sub.8+.delta. on Ni-tapes with a buffer layer of Cr/Ag or Cr/(Ag--Pd) have been described with a high transition temperature are described along with, one and two step methods of manufacture.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: May 25, 1999
    Assignee: University of Houston
    Inventors: Ching-Wu Chu, Ruling L. Meng, Yu-Yi Xue