H01J 2223/04
Cathodes
H01J2223/04 (Cathodes) appears on 11 US grants and 3 published applications in this corpus.
Search patents in H01J- Granted patents
- 11
- Published applications
- 3
- Assignees
- 10
- Inventors
- 43
- Latest grant
- 11 Oct 2011
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Field-emission cathode, with optical control11 Oct 2011US 8,035,295 B2Thales
- Article comprising aligned nanowires25 May 2004US 6,741,019 B1Agere Systems Inc.
- Magnetron having a lowered oscillation frequency and processing equipment employing the same25 Nov 2003US 6,653,788 B2Hitachi Electronic Devices Co., Ltd.
- Impregnated-type cathode substrate with large particle diameter low porosity region and small particle diameter high porosity region10 Sep 2002US 6,447,355 B1Kabushiki Kaisha Toshiba
- Electrode13 Aug 2002US 6,432,325 B1TDK Corporation
- 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.
- Field-emission cathode, with optical control22 Oct 2009US 2009/0261727 A1Thales
- Magnetron having a lowered oscillation frequency and processing equipment employing the same18 Apr 2002US 2002/0043937 A1Hitachi Electronic Devices Co., Ltd.
Most cited
By later US patents
- Article comprising aligned nanowires172US 6,741,019 B1Agere Systems Inc. · 2004
- Process for fabricating article comprising aligned truncated carbon nanotubes139US 6,283,812 B1Agere Systems Guardian Corp. · 2001
- Field-emission cathode capable of forming an electron beam having a high current density and a low ripple25US 5,929,557 ANEC Corporation · 1999
- Magnetron having a lowered oscillation frequency and processing equipment employing the same10US 6,653,788 B2Hitachi Electronic Devices Co., Ltd. · 2003
- Impregnated type cathode assembly, cathode substrate for use in the assembly, electron gun using the assembly, and electron tube using the cathode assembly8US 6,034,469 AKabushiki Kaisha Toshiba · 2000