H01J 1/15
Cathodes heated directly by an electric current
H01J1/15 (Cathodes heated directly by an electric current) appears on 235 US grants and 136 published applications in this corpus.
Search patents in H01J- Granted patents
- 235
- Published applications
- 136
- Assignees
- 134
- Inventors
- 514
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 12 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 8 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 8 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 6 | 3 |
| 2003 | 4 | 6 |
| 2004 | 7 | 3 |
| 2005 | 2 | 8 |
| 2006 | 2 | 3 |
| 2007 | 5 | 3 |
| 2008 | 3 | 6 |
| 2009 | 3 | 9 |
| 2010 | 5 | 8 |
| 2011 | 5 | 3 |
| 2012 | 6 | 3 |
| 2013 | 3 | 8 |
| 2014 | 6 | 5 |
| 2015 | 3 | 10 |
| 2016 | 8 | 7 |
| 2017 | 7 | 7 |
| 2018 | 9 | 5 |
| 2019 | 3 | 7 |
| 2020 | 10 | 3 |
| 2021 | 9 | 6 |
| 2022 | 0 | 3 |
| 2023 | 3 | 5 |
| 2024 | 13 | 9 |
| 2025 | 5 | 5 |
| 2026 | 5 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Flat emitter with compliant supported end16 Jun 2026US 12,653,467 B2GE Precision Healthcare LLC
- Electron source and method for manufacturing same, and emitter and device provided with same19 May 2026US 12,633,487 B2Denka Company Limited
- Mounted planar filament31 Mar 2026US 12,592,355 B2Moxtek, Inc.
- Emitter and device comprising same24 Mar 2026US 12,586,747 B2Denka Company Limited
- System and apparatus for stabilizing electron sources in charged particle systems10 Mar 2026US 12,573,580 B2ASML Netherlands B. V.
- Flat emitter with compliant supported end18 Sep 2025US 2025/0292986 A1GE Precision Healthcare LLC
- Emitter and device comprising same3 Jul 2025US 2025/0218717 A1Denka Company Limited
- Cathode assemblies, methods for adjusting focal points of x-rays, and methods for controlling focused electron beams27 Mar 2025US 2025/0104957 A1Wuhan United Imaging Healthcare Co., Ltd.
- Mounted planar filament6 Mar 2025US 2025/0079108 A1Moxtek, Inc.
- Cathode heater assembly and method of manfacture30 Jan 2025US 2025/0037958 A1
Most cited
By later US patents
- Electronic fluorescent display60US 5,229,691 APanocorp Display Systems · 1993
- Electronic fluorescent display54US 5,565,742 APanocorp Display Systems · 1996
- Display device45US 5,347,201 APanocorp Display Systems · 1994
- Cathode arrangement34US 5,343,112 ABalzers Aktiengesellschaft · 1994
- Method and apparatus for producing an electron beam from a thermionic cathode33US 4,528,474 A1985