Patents by Inventor Alexandra Mitchell

Alexandra Mitchell 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).

  • Ion exchangeable, transparent gahnite-spinel glass ceramics with high hardness and modulus
    Patent number: 11192818
    Abstract: A transparent gahnite-spinel glass ceramic is provided. The glass ceramic includes a first crystal phase including (MgxZn1?x)Al2O4 where x is less than 1 and a second crystal phase including tetragonal ZrO2. The glass ceramic may be ion exchanged. Methods for producing the glass ceramic are also provided.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: December 7, 2021
    Assignee: CORNING INCORPORATED
    Inventors: George Halsey Beall, John Philip Finkeldey, Alexandra Mitchell, Charlene Marie Smith, Steven Alvin Tietje
  • ION EXCHANGEABLE, TRANSPARENT GAHNITE-SPINEL GLASS CERAMICS WITH HIGH HARDNESS AND MODULUS
    Publication number: 20190161397
    Abstract: A transparent gahnite-spinel glass ceramic is provided. The glass ceramic includes a first crystal phase including (MgxZn1?x)Al2O4 where x is less than 1 and a second crystal phase including tetragonal ZrO2. The glass ceramic may be ion exchanged. Methods for producing the glass ceramic are also provided.
    Type: Application
    Filed: November 28, 2018
    Publication date: May 30, 2019
    Inventors: George Halsey Beall, John Philip Finkeldey, Alexandra Mitchell, Charlene Marie Smith, Steven Alvin Tietje