Patents by Inventor Stuart J. Penn

Stuart J. Penn 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).

  • Sintered materials
    Patent number: 6680268
    Abstract: Sintered alumina of Q value of greater than 25,000 and up to and greater than 45,000 at 10 GHz and at 25° C., useful in useful in dielectric resonators can be obtained by sintering alumina powders with low level of impurities at between 1500° C. and 1600° C. until a density of at least 98% of its theoretical value is obtained.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: January 20, 2004
    Assignee: South Bank University Enterprises Limited
    Inventors: Neil M. Alford, Stuart J. Penn