H01J 9/08
Manufacture of heaters for indirectly-heated cathodes
H01J9/08 (Manufacture of heaters for indirectly-heated cathodes) appears on 18 US grants and 7 published applications in this corpus.
Search patents in H01J- Granted patents
- 18
- Published applications
- 7
- Assignees
- 16
- Inventors
- 41
- Latest grant
- 25 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 2 | 3 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Monolithic heater for thermionic electron cathode25 Feb 2025US 12,237,138 B2Applied Physics Technologies, Inc.
- Pincer mount cathode2 Jul 2024US 12,027,340 B2Kimball Physics, Inc.
- Monolithic heater for thermionic electron cathode2 Apr 2024US 11,948,769 B2Applied Physics Technologies, Inc.
- Heaters for hollow cathodes1 Nov 2022US 11,488,799 B1Pipl Limited
- Tungsten wire, cathode heater and vibration service lamp filament12 Jan 2016US 9,236,212 B2Kabushiki Kaisha Toshiba
- Monolithic heater for thermionic electron cathode27 Jun 2024US 2024/0212964 A1Applied Physics Technologies, Inc.
- Pincer Mount Cathode16 May 2024US 2024/0161994 A1Kimball Physics, Inc.
- Monolithic heater for thermionic electron cathode15 Feb 2024US 2024/0055213 A1Applied Physics Technologies, Inc.
- Tungsten wire, cathode heater and vibration service lamp filament15 Nov 2012US 2012/0285586 A1Kabushiki Kaisha Toshiba
- Tungsten wire, cathode heater and vibration service lamp filament8 Apr 2010US 2010/0084055 A1Kabushiki Kaisha Toshiba
Most cited
By later US patents
- Thin high temperature heater22US 5,155,340 AMitsubishi Denki Kabushiki Kaisha · 1992
- Method of manufacturing a coil heater of an indirectly-heated type cathode electrode of electronic tubes12US 4,149,104 AHitachi, Ltd. · 1979
- Method of making cathode heaters7US 4,126,489 AVarian Associates, Inc. · 1978
- Cathode heater and cathode assembly for microwave power tubes7US 5,350,969 ALitton Systems, Inc. · 1994
- Inorganically insulated heater, and cathode ray tube and air flow sensor using the same4US 5,138,221 AHitachi, Ltd. · 1992