H01J 17/50
Thermionic-cathode tubes
H01J17/50 (Thermionic-cathode tubes) appears on 31 US grants and 3 published applications in this corpus.
Search patents in H01J- Granted patents
- 31
- Published applications
- 3
- Assignees
- 16
- Inventors
- 55
- Latest grant
- 3 Sep 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 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 | 3 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Time-dependent plasma systems and methods for thermionic conversion3 Sep 2024US 12,081,145 B2Modern Hydrogen, Inc.
- Bidirectional gas discharge tube25 Oct 2022US 11,482,394 B2General Electric Technology GmbH
- Gas discharge tube DC circuit breaker15 Feb 2022US 11,251,598 B2General Electric Technology GmbH
- Thermo-quiescent reservoir system for a gaseous-discharge device30 Nov 1999US 5,994,661 ALitton Systems, Inc.
- Luminescent panel for color video display and its driving system, and a color video display apparatus utilizing the same.13 May 1997US 5,629,716 AMatsushita Electronics Corporation
Most cited
By later US patents
- Plasma switch with hollow, thermionic cathode35US 5,075,594 AHughes Aircraft Company · 1991
- Hollow cathode plasma switch with magnetic field29US 5,132,597 AHughes Aircraft Company · 1992
- Gas circulation apparatus for ceramic electron tubes20US 4,888,518 AITT Corporation · 1989
- Laser generated high electron density source14US 4,346,330 AThermo Electron Corporation · 1982
- Photoemissive trigger for backlighted thyratron switches13US 5,057,740 AIntegrated Applied Physics Inc. · 1991