Thermionic emission device

Electric lamp and discharge devices – Discharge devices having a thermionic or emissive cathode

Reexamination Certificate

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C313S3460DC, C313S306000

Reexamination Certificate

active

07915798

ABSTRACT:
A thermionic emission device includes an insulating substrate, and one or more grids located thereon. Each grid includes a first, second, third and fourth electrode down-leads located on the periphery thereof, and a thermionic electron emission unit therein. The first and second electrode down-leads are parallel to each other. The third and fourth electrode down-leads are parallel to each other. The first and second electrode down-leads are insulated from the third and fourth electrode down-leads. The thermionic electron emission unit includes a first electrode, a second electrode, and a thermionic electron emitter. The first electrode and the second electrode are separately located and electrically connected to the first electrode down-lead and the third electrode down-lead respectively. The thermionic electron emitter includes at least one carbon nanotube wire.

REFERENCES:
patent: 5905335 (1999-05-01), Fushimi et al.
patent: 6011567 (2000-01-01), Nakamura et al.
patent: 2003/0160570 (2003-08-01), Sasaki et al.
patent: 2009/0167136 (2009-07-01), Liu et al.
patent: 1440044 (2003-09-01), None
patent: 1773664 (2006-05-01), None
patent: 101471211 (2009-07-01), None
Cox et al., Thermionic emission from defective carbon nanotubes, Applied Physics Letters, Sep. 13, 2004, 2065-2067, vol. 85, No. 11.

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