H01J 9/022
Of cold cathodes
Official title: {of cold cathodes}
H01J9/022 (Of cold cathodes) appears on 2,036 US grants and 1,488 published applications in this corpus.
Search patents in H01J- Granted patents
- 2,036
- Published applications
- 1,488
- Assignees
- 504
- Inventors
- 2,647
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 7 | 0 |
| 1991 | 11 | 0 |
| 1992 | 27 | 0 |
| 1993 | 34 | 0 |
| 1994 | 30 | 0 |
| 1995 | 41 | 0 |
| 1996 | 58 | 0 |
| 1997 | 90 | 0 |
| 1998 | 97 | 0 |
| 1999 | 119 | 0 |
| 2000 | 120 | 0 |
| 2001 | 105 | 45 |
| 2002 | 104 | 131 |
| 2003 | 109 | 131 |
| 2004 | 118 | 150 |
| 2005 | 111 | 157 |
| 2006 | 98 | 168 |
| 2007 | 71 | 134 |
| 2008 | 83 | 95 |
| 2009 | 70 | 83 |
| 2010 | 84 | 67 |
| 2011 | 86 | 50 |
| 2012 | 51 | 37 |
| 2013 | 45 | 42 |
| 2014 | 37 | 26 |
| 2015 | 36 | 26 |
| 2016 | 22 | 19 |
| 2017 | 26 | 18 |
| 2018 | 23 | 18 |
| 2019 | 16 | 22 |
| 2020 | 23 | 10 |
| 2021 | 11 | 11 |
| 2022 | 7 | 11 |
| 2023 | 9 | 16 |
| 2024 | 11 | 9 |
| 2025 | 16 | 4 |
| 2026 | 4 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for fabricating silicon die stacks for electron emitter array chips26 May 2026US 12,640,326 B2
- Methods of manufacturing plasma generating cells for a plasma source14 Apr 2026US 12,601,621 B2APPLIED Materials.Inc.
- Sensor assembly and methods of manufacturing thereof17 Feb 2026US 12,553,751 B2APPLIED Materials.Inc.
- Packaging for a sensor and methods of manufacturing thereof17 Feb 2026US 12,553,752 B2APPLIED Materials.Inc.
- Packaging for a sensor and methods of manufacturing thereof9 Dec 2025US 12,492,926 B2APPLIED Materials.Inc.
- X-ray devices with nanotube emitters and methods of forming8 Oct 2026US 2026/0311951 A1Varex Imaging Corporation
- Field emission device having automatic current limiter10 Sep 2026US 2026/0269165 A1LG Electronics Inc.
- Tungsten alloy wire, preparation method therefor and use thereof, and tungsten carbide alloy filament13 Aug 2026US 2026/0234761 A1Xiamen Honglu Tungsten Molybdenum Industry Co., Ltd.
- Silicon carbide based triode electron emitter and producing an electron beam with same23 Jul 2026US 2026/0213110 A1
- Methods of manufacturing plasma generating cells for a plasma source16 Jul 2026US 2026/0202227 A1APPLIED Materials.Inc.
Most cited
By later US patents
- Method for manufacturing porous structure and method for forming pattern645US 6,565,763 B1Kabushiki Kaisha Toshiba · 2003
- Self-oriented bundles of carbon nanotubes and method of making same326US 6,232,706 B1The Board of Trustees of the Leland Stanford Junior University · 2001
- Vertical microelectronic field emission devices312US 5,475,280 AMcnc · 1995
- Microelectronic and microelectromechanical devices comprising carbon nanotube components, and methods of making same295US 6,445,006 B1Advanced Technology Materials, Inc. · 2002
- Method to form self-aligned gate structures around cold cathode emitter tips using chemical mechanical polishing technology285US 5,229,331 AMicron Technology, Inc. · 1993