Patents by Inventor Taria Quadair

Taria Quadair 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).

  • Stabilized zirconia
    Patent number: 4891343
    Abstract: Ceramic tetragonal zirconia is stabilized against transformation to the undersirable monoclinic form by incorporation of a mixture of stabilizers comprising controlled amounts of dysprosia and ceria, together with either yttria or titania (or both). The mixture can be prepared by wet-mixing zirconia with nitrates of the stabilizer materials, followed by drying, then calcining, e.g., at 650.degree. C. to drive off decomposition products, and then sintering at, e.g., 1465.degree.-1475.degree. C.
    Type: Grant
    Filed: August 10, 1988
    Date of Patent: January 2, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Taria Quadair