Patents by Inventor Francis Robert Trumble

Francis Robert Trumble 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).

  • Single mode resonant cavity
    Patent number: 6131386
    Abstract: A single mode resonant cavity is adapted to absorb energy via a single excitation mode in a plurality of overlapping absorption bands having different respective resonant frequencies, thereby increasing the resonant bandwidth of the cavity. The high Q-factor cavity may form part of a microwave powered catalytic converter for exhaust gas, and has the advantage that as the cavity warms up and physically expands the coupling efficiency between the cavity and a relatively narrow waveband microwave source remains good.
    Type: Grant
    Filed: June 15, 1998
    Date of Patent: October 17, 2000
    Assignee: Central Research Laboratories Limited
    Inventor: Francis Robert Trumble