H01J 3/025
Electron guns using a discharge in a gas or a vapour as
Official title: {Electron guns using a discharge in a gas or a vapour as electron source (gas-filled discharge tubes with gaseous cathodes H01J15/00)}
H01J3/025 (Electron guns using a discharge in a gas or a vapour as) appears on 57 US grants and 29 published applications in this corpus.
Search patents in H01J- Granted patents
- 57
- Published applications
- 29
- Assignees
- 44
- Inventors
- 127
- Latest grant
- 28 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 2 |
| 2003 | 2 | 1 |
| 2004 | 0 | 1 |
| 2005 | 2 | 6 |
| 2006 | 4 | 2 |
| 2007 | 1 | 0 |
| 2008 | 0 | 2 |
| 2009 | 3 | 5 |
| 2010 | 0 | 0 |
| 2011 | 4 | 1 |
| 2012 | 2 | 1 |
| 2013 | 0 | 1 |
| 2014 | 2 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 2 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 1 |
| 2024 | 2 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Charge carrier generation source28 Jan 2025US 12,211,663 B2Scia Systems GmbH
- Particle beam gun control systems and methods19 Nov 2024US 12,145,006 B2Varian Medical Systems, Inc.
- Electron source devices, electron source assemblies, and methods for generating electrons2 Jan 2024US 11,862,426 B1Teledyne FLIR Detection, Inc.
- Particle beam gun control systems and methods25 Oct 2022US 11,478,664 B2Varian Medical Systems, Inc.
- Particle beam gun control systems and methods24 Nov 2020US 10,843,011 B2Varian Medical Systems, Inc.
- Particle beam gun control systems and methods9 Feb 2023US 2023/0040534 A1Varian Medical Systems, Inc.
- Charge carrier generation source22 Dec 2022US 2022/0406559 A1Scia Systems GmbH
- Particle beam gun control systems and methods22 Oct 2020US 2020/0330798 A1Varian Medical Systems, Inc.
- Plasma bridge neutralizer for ion beam etching22 Aug 2019US 2019/0259559 A1Veeco Instruments Inc.
- Particle beam gun control systems and methods24 Jan 2019US 2019/0022422 A1Varian Medical Systems, Inc.
Most cited
By later US patents
- Cylindrical electron beam generating/triggering device and method for generation of electrons228US 7,122,949 B2Neocera, Inc. · 2006
- Large-area uniform electron source137US 5,003,178 AElectron Vision Corporation · 1991
- Broad-beam electron source70US 4,684,848 AKaufman & Robinson, Inc. · 1987
- Discharge device having cathode with micro hollow array70US 5,686,789 AOsram Sylvania Inc. · 1997
- Discharge device having cathode with micro hollow array60US 5,939,829 AOsram Sylvania Inc. · 1999