H01J 3/026
Eliminating deleterious effects due to thermal effects, electric or magnetic field
Official title: {Eliminating deleterious effects due to thermal effects, electric or magnetic field (H01J3/021 - H01J3/025 take precedence)}
H01J3/026 (Eliminating deleterious effects due to thermal effects, electric or magnetic field) appears on 20 US grants and 17 published applications in this corpus.
Search patents in H01J- Granted patents
- 20
- Published applications
- 17
- Assignees
- 17
- Inventors
- 41
- Latest grant
- 1 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 1 | 1 |
| 2008 | 2 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 2 | 2 |
| 2016 | 1 | 0 |
| 2017 | 0 | 2 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 2 | 1 |
| 2021 | 0 | 1 |
| 2022 | 2 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Transport Package for Charged Particle Gun and Maintenance Method for Charged Particle Gun20 Aug 2026US 2026/0245824 A1Hitachi High-Tech Corporation
- Field emission cathode device and method of forming a field emission cathode device7 Mar 2024US 2024/0079196 A1NCX Corporation
- Charged Particle Gun and Charged Particle Beam Device29 Dec 2022US 2022/0415602 A1Hitachi High-Tech Corporation
- On-chip micro electron source and manufacturing method thereof23 Dec 2021US 2021/0398766 A1Peking University
- X-ray tube and cathode cup with deposition shield5 Nov 2020US 2020/0350137 A1GE Precision Healthcare LLC
Most cited
By later US patents
- Electron beam directed energy device and methods of using same50US 7,282,727 B22007
- Means and method for suppressing oscillations in electron guns8US 3,963,955 AVarian Associates, Inc. · 1976
- Insulated elastic support and clamping means for resistance heaters and emitter tip of electron gun7US 4,068,145 ANihon Denshi Kabushiki Kaisha · 1978
- Gridded convergent flow electron gun for linear beam tubes6US 3,983,446 AVarian Associates, Inc. · 1976
- Beam generating system for electron tubes, particularly travelling wave tubes5US 4,644,219 ASiemens Aktiengesellschaft · 1987