Class H01J : ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
Subclass 1/148: Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps (details of electron-optical arrangements or of ion traps H01J 3/00) Main electrodes Solid thermionic cathodes characterised by the material with compounds having metallic conductive properties, e.g. lanthanum boride, as an emissive material
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12057285 | Annular gap cathodes with graphite caps | Nov 08, 23 | Aug 06, 24 | Kimball Physics Inc. |
| 11152185 | Electron source and production method therefor | Feb 17, 21 | Oct 19, 21 | DENKA COMPANY LIMITED |
| 11094493 | Emitter structures for enhanced thermionic emission | Aug 01, 19 | Aug 17, 21 | Lockheed Martin Corporation |
| 10957511 | Electron source and production method therefor | Dec 09, 19 | Mar 23, 21 | DENKA COMPANY LIMITED |
| 10573481 | Electron guns for electron beam tools | Nov 28, 18 | Feb 25, 20 | NUFLARE TECHNOLOGY, INC.; NuFlare Technology America, Inc.; |
| 10553390 | Electron source and production method therefor | Jun 29, 17 | Feb 04, 20 | DENKA COMPANY LIMITED |
| 10553388 | High-brightness lanthanum hexaboride cathode and method for manufacturing of cathode | Nov 28, 18 | Feb 04, 20 | NUFLARE TECHNOLOGY, INC.; NuFlare Technology America, Inc.; |
| 9790620 | Method of reducing work function in carbon coated LaB6 cathodes | Jan 06, 17 | Oct 17, 17 | NUFLARE TECHNOLOGY, INC., NuFlare Technology America, Inc., |
| 9490098 | Thermal-field type electron source composed of transition metal carbide material | Jan 11, 16 | Nov 08, 16 | Applied Physics Technologies, Inc. |
| 9299525 | Thermionic cathode with even electric field distribution on electron emitting surface | Oct 07, 13 | Mar 29, 16 | NUFLARE TECHNOLOGY, INC. |
| 9240301 | Thermal-field type electron source composed of transition metal carbide material with artificial facet | Mar 27, 13 | Jan 19, 16 | Applied Physics Technologies, Inc. |
| 9165737 | High-brightness, long life thermionic cathode and methods of its fabrication | Oct 04, 12 | Oct 20, 15 | NUFLARE TECHNOLOGY, INC. |
| 9070527 | Electron gun and electron beam device | Feb 25, 11 | Jun 30, 15 | Param Corporation |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0095,944 | ELECTRON GUN USING VIRTUAL SOURCE METHOD | Sep 13, 24 | Mar 20, 25 | Not available |
| 2024/0331,965 | REFERENCE ELECTRODE FOR HIGH TEMPERATURE CORROSION SENSOR APPLICATIONS | Apr 01, 24 | Oct 03, 24 | Not available |
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