H01J 2329/041
Characterised by the emitter shape
Official title: characterised by the emitter shape
H01J2329/041 (Characterised by the emitter shape) appears on 40 US grants and 59 published applications in this corpus.
Search patents in H01J- Granted patents
- 40
- Published applications
- 59
- Assignees
- 26
- Inventors
- 116
- Latest grant
- 15 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 2 | 2 |
| 2008 | 0 | 2 |
| 2009 | 0 | 9 |
| 2010 | 3 | 13 |
| 2011 | 3 | 12 |
| 2012 | 9 | 9 |
| 2013 | 11 | 5 |
| 2014 | 4 | 3 |
| 2015 | 4 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01J 2329/0431NanotubesIndexing code20
- H01J 2329/0413Microengineered point emittersIndexing code9
- H01J 2329/0423Microengineered edge emittersIndexing code7
- H01J 2329/0428FibresIndexing code5
- H01J 2329/0436WhiskersIndexing code3
- H01J 2329/0434ParticlesIndexing code1
- H01J 2329/0421Pillar shaped emittersIndexing code0
- H01J 2329/0426Coatings on the emitter surfaceIndexing code0
Recent patents
- Carbon nanotube based cold cathodes for x-ray generation15 Jul 2025US 12,362,125 B2
- Composite carbon nanotube structure12 Jun 2018US 9,997,323 B2Hon Hai Precision Industry Co., Ltd.
- Method for fabricating field emission cathode structure21 Jul 2015US 9,087,667 B2Hon Hai Precision Industry Co., Ltd.
- Composition for forming electron emission source, electron emission source including the composition, method of preparing the electron emission source, and field emission device including the electron emission source19 May 2015US 9,034,212 B2Samsung Electronics Co., Ltd.
- Field emission cathode14 Apr 2015US 9,006,964 B2Lightlab Sweden AB
- Carbon nanotube based cold cathodes for x-ray generation26 Feb 2026US 2026/0058086 A1Carestream Dental LLC
- Carbon nanotube based cold cathodes for x-ray generation22 Feb 2024US 2024/0062984 A1
- Electron emission element and method for manufacturing the same2 Oct 2014US 2014/0292181 A1Intellectual Discovery Co., Ltd.
- Method for fabricating field emission cathode structure19 Jun 2014US 2014/0166494 A1Hon Hai Precision Industry Co., Ltd.
- Composite carbon nanotube structure6 Feb 2014US 2014/0037895 A1Hon Hai Precision Industry Co., Ltd.
Most cited
By later US patents
- Article comprising metal oxide nanostructures and method for fabricating such nanostructures18US 7,276,389 B2Samsung Electronics Co., Ltd. · 2007
- Method for manufacturing a cathode tip of electric field emission device12US 6,069,018 AElectronics and Telecommunications Research Institute · 2000
- Electron emitter and process of fabrication8US 7,202,596 B2Electrovac AG · 2007
- Carbon nanotube fiber cathode5US 8,766,522 B1The United States of America as represented by the Secretary of the Air Force · 2014
- Method of forming a lift-off layer having controlled adhesion strength3US 5,944,975 ATexas Instruments Incorporated · 1999