Patents by Inventor Chung K. Chiang

Chung K. Chiang 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).

  • Gel method for preparing high purity Bi-based 110K superconductor using oxalic acid
    Patent number: 5071829
    Abstract: This invention describes the way to prepare high purity Bi-based superconducting powders with the zero resistance temperature at 110K. The technique employs the dissolution of corresponding metal nitrates in deionized water, plus oxalic acid to chelate the metal cations. The amount of oxalic acid equals to about half of the total nitrate anion in molar ratio. After pH adjustment and gelation, optimal calcination results in 110K superconducting powders in high purity.
    Type: Grant
    Filed: June 27, 1990
    Date of Patent: December 10, 1991
    Assignee: Industrial Technology Research Institute
    Inventors: Chung K. Chiang, Cheng Y. Shei, Yao T. Huang