Thermionic cathode with even electric field distribution on electron emitting surface
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 29, 2016
Grant Date -
May 22, 2014
app pub date -
Oct 7, 2013
filing date -
Nov 19, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Loading Importance Indicators... 
Abstract
A thermionic cathode of an embodiment includes a carbon coating applied to an outer surface of the side, the carbon coating comprising a contiguous extended portion surrounding the upper section and spaced apart from said upper section by a gap having 1 μm or more and 10 μm or less in width and having a difference of 1 μm or less in the width between a maximum value and a minimum value in a periphery of the electron emitting surface.
First Claim
Other Claims data not available
Family
Loading Family data...
International Classification(s)
- 2013 Application Filing Year
- H01J Class
- 2042 Applications Filed
- 1790 Patents Issued To-Date
- 87.66 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- H01J Class
- 20.76 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 29, 2027 |
