H01J 9/047
Cathodes having impregnated bodies
Official title: {Cathodes having impregnated bodies (H01J9/045 takes precedence)}
H01J9/047 (Cathodes having impregnated bodies) appears on 52 US grants and 11 published applications in this corpus.
Search patents in H01J- Granted patents
- 52
- Published applications
- 11
- Assignees
- 25
- Inventors
- 91
- Latest grant
- 6 Oct 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 2 |
| 2002 | 1 | 2 |
| 2003 | 0 | 2 |
| 2004 | 3 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Low work function electron beam filament assembly6 Oct 2020US 10,796,876 B2Colorado State University Research Foundation
- Impregnated yttric or gadolinium-containing Barium-aluminum-scandate cathodes and their fabrication methods24 May 2016US 9,349,561 B2Beijing University of Technology
- Cathode emissive body for an impregnated cathode of an electron tube27 Dec 2005US 6,979,942 B2Thomson Licensing
- Cathode design3 Aug 2004US 6,771,014 B2The Boeing Company
- Method for manufacturing impregnated cathode having a cathode pellet16 Mar 2004US 6,705,913 B2Matsushita Electric Industrial Co., Ltd.
- Preparation method of tungsten-rhenium-based diffusion-type thermionic cathode material containing low melting point barium calcium aluminate salt24 Sep 2026US 2026/0290736 A1Beijing University of Technology
- Cathode and manufacturing method thereof23 Jul 2026US 2026/0213111 A1Shanghai United Imaging Healthcare Co., Ltd.
- Low work function electron beam filament assembly20 Sep 2018US 2018/0269024 A1Colorado State University Research Foundation
- Impregnated Yttric or Gadolinium-Containing Barium-Aluminum-Scandate Cathodes and Their Fabrication Methods2 May 2013US 2013/0105742 A1Beijing University of Technology
- Cathode emissive body for an impregnated cathode of an electron tube19 Feb 2004US 2004/0032195 A1Thomson Licensing
Most cited
By later US patents
- Method of manufacturing a scandate dispenser cathode and dispenser cathode manufactured by means of the method20US 4,594,220 AU. S. Philips Corporation · 1986
- Packing for a consumer article15US 4,651,877 A501 Van Nelle Lassie B.V. · 1987
- Thermionic electron emitters10US 4,570,099 AE M I-Varian Limited · 1986
- Impregnated cathodes with a controlled porosity9US 5,118,317 AU. S. Philips Corporation · 1992
- Method of making a long life high current density cathode from tungsten and iridium powders using a quaternary compound as the impregnant8US 4,957,463 AThe United States of America as represented by the Secretary of the Army · 1990