Patents by Inventor Wie H. Pan

Wie H. Pan 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).

  • Manufacturing method for superconducting ceramics and products thereof
    Patent number: 5149682
    Abstract: Superior homogeneity in ceramic materials is achieved by reacting certain soluble metal salts with quaternary ammonium carbonates to form co-precipitated metal carbonates. The precipitate can be recovered and processed to make superconductors. For example, a solution of nitrates of yttrium, barium, and copper are treated with a solution of tetraethyl ammonium carbonate to form co-precipitated carbonates of Y, Ba, Cu. The precipitate is recovered and calcined to form a superconducting material.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: September 22, 1992
    Assignee: W. R. Grace & Co. -Conn.
    Inventors: Nicholas D. Spencer, Wie H. Pan, John Rudesill