Patents by Inventor Jawana J. James

Jawana J. James 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).

  • High temperature refractory of MgCr.sub.2 O.sub.4 matrix and unstabilized ZrO.sub.2 particles
    Patent number: 4647547
    Abstract: A high chromia refractory composite has been developed with improved thermal shock resistance and containing about 5-30 wt. % of unstabilized ZrO.sub.2 having a temperature-dependent phase change resulting in large expansion mismatch between the ZrO.sub.2 and the chromia matrix which causes microcracks to form during cooling in the high chromia matrix. The particle size preferably is primarily between about 0.6-5 microns and particularly below about 3 microns with an average size in the order of 1.2-1.8 microns.
    Type: Grant
    Filed: December 10, 1985
    Date of Patent: March 3, 1987
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Jitendra P. Singh, Jawana J. James, John J. Picciolo