Patents by Inventor Songtae Kwon

Songtae Kwon 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).

  • Method for fabrication of lead-based perovskite materials
    Patent number: 6620752
    Abstract: The disclosed invention relates to PMN compounds, powders and products thereof, especially to PMN-PT compounds, powders and products which have the perovskite structure. The PMN-PT compounds are characterized by the formula (1−x)Pb(Mg1/3Nb2/3)O3−xPbTiO3 where x is about 0.0 to about 0.95, preferably x is about 0.0 to about 0.40. The compounds are made by sintering a precursor powder of the compound. PMN-PT products produced from the precursor powders have much greater densities than products produced from PMN-PT starting powder. The invention also relates to textured PMN-PT produced from the precursor powders.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: September 16, 2003
    Assignee: The Penn State Research Foundation
    Inventors: Gary L. Messing, Songtae Kwon, Edward M. Sabolsky
  • Method for fabrication of lead-based perovskite materials
    Publication number: 20020193237
    Abstract: The disclosed invention relates to PMN compounds, powders and products thereof, especially to PMN-PT compounds, powders and products which have the perovskite structure. The PMN-PT compounds are characterized by the formula (1−x)Pb(Mg⅓Nb⅔)O3−xPbTiO3 where x is about 0.0 to about 0.95, preferably x is about 0.0 to about 0.40. The compounds are made by sintering a precursor powder of the compound. PMN-PT products produced from the precursor powders have much greater densities than products produced from PMN-PT starting powder. The invention also relates to textured PMN-PT produced from the precursor powders.
    Type: Application
    Filed: August 24, 2001
    Publication date: December 19, 2002
    Inventors: Gary L. Messing, Songtae Kwon, Edward M. Sabolsky