H01J 1/148
With compounds having metallic conductive properties
Official title: with compounds having metallic conductive properties, e.g. lanthanum boride, as an emissive material
H01J1/148 (With compounds having metallic conductive properties) appears on 46 US grants and 30 published applications in this corpus.
Search patents in H01J- Granted patents
- 46
- Published applications
- 30
- Assignees
- 31
- Inventors
- 105
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 3 |
| 2015 | 2 | 0 |
| 2016 | 3 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 2 |
| 2020 | 4 | 1 |
| 2021 | 3 | 4 |
| 2022 | 2 | 2 |
| 2023 | 1 | 4 |
| 2024 | 3 | 5 |
| 2025 | 2 | 2 |
| 2026 | 5 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electron gun using virtual source method23 Jun 2026US 12,665,154 B2Korea Research Institute of Standards and Science
- Electron source and method for manufacturing same, and emitter and device provided with same19 May 2026US 12,633,487 B2Denka Company Limited
- Emitter and device comprising same24 Mar 2026US 12,586,747 B2Denka Company Limited
- Negative ion source and negative ion generation method24 Feb 2026US 12,558,663 B2Japan Atomic Energy Agency
- Charged particle beam source13 Jan 2026US 12,525,420 B2FEI Company
- Emitter and device comprising same3 Jul 2025US 2025/0218717 A1Denka Company Limited
- Electron gun using virtual source method20 Mar 2025US 2025/0095944 A1Korea Research Institute of Standards and Science
- Laminate, electron source and electronic device containing laminate, and production method and cleaning method for laminate28 Nov 2024US 2024/0395494 A1National Institute for Materials Science
- Electron source, manufacturing method therefor, and device comprising electron source17 Oct 2024US 2024/0347306 A1Denka Company Limited
- Reference electrode for high temperature corrosion sensor applications3 Oct 2024US 2024/0331965 A1
Most cited
By later US patents
- Thermionic cathode structure29US 4,878,866 ADenki Kagaku Kogyo Kabushiki Kaisha · 1989
- Thermionic emission cathode having a tip of a single crystal of lanthanum hexaboride23US 4,055,780 ANational Institute for Researches in Inorganic Materials · 1977
- Electron beam exposing apparatus20US 4,430,570 ATokyo Shibaura Denki Kabushiki Kaisha · 1984
- Electron emission materials and components17US 5,911,919 AIntegrated Thermal Sciences, Inc. · 1999
- Electron source of a single crystal of lanthanum hexaboride emitting surface of (110) crystal plane15US 4,054,946 ABell Telephone Laboratories, Incorporated · 1977