H01J 1/144
With other metal oxides as an emissive material
Official title: with other metal oxides as an emissive material
H01J1/144 (With other metal oxides as an emissive material) appears on 29 US grants and 21 published applications in this corpus.
Search patents in H01J- Granted patents
- 29
- Published applications
- 21
- Assignees
- 25
- Inventors
- 96
- Latest grant
- 11 Mar 2025
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 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 2 | 3 |
| 2011 | 1 | 1 |
| 2012 | 2 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 3 | 3 |
| 2020 | 2 | 2 |
| 2021 | 4 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Functional metal oxides and methods of making same11 Mar 2025US 12,247,317 B2The Johns Hopkins University
- Thermionic emission device and method for making the same7 Dec 2021US 11,195,686 B2Hon Hai Precision Industry Co., Ltd.
- Thermionic tungsten/scandate cathodes and method of making the same27 Jul 2021US 11,075,049 B2The Government of the United States of America, as represented by the Secretary of the Navy
- Tungsten alloy part, and discharge lamp, transmitting tube, and magnetron using the same4 May 2021US 10,998,157 B2Kabushiki Kaisha Toshiba
- Electrical potential energy to electrical kinetic energy converter, ozone generator, and light emitter2 Feb 2021US 10,910,211 B2
- 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
- Functional metal oxides and methods of making same13 Oct 2022US 2022/0325439 A1The Johns Hopkins University
- Thermionic emission device and method for making the same15 Jul 2021US 2021/0217572 A1Hon Hai Precision Industry Co., Ltd.
- Tungsten electrode material27 Feb 2020US 2020/0066505 A1A. L. M. T. Corp.
- Thermionic Tungsten/Scandate Cathodes and Method of Making The Same6 Feb 2020US 2020/0043691 A1The Government of the United States of America, as represented by the Secretary of the Navy
Most cited
By later US patents
- Hexagonal-bipyramid crystalline scandium oxide powder and a process for preparing the same22US 4,980,141 AMitsubishi Denki Kabushiki Kaisha · 1990
- Electron emission materials and components17US 5,911,919 AIntegrated Thermal Sciences, Inc. · 1999
- Electron emission materials and components11US 6,190,579 B1Integrated Thermal Sciences, Inc. · 2001
- Thermionic tungsten/scandate cathodes and methods of making the same8US 10,497,530 B2The Government of the United States of America, as represented by the Secretary of the Navy · 2019
- Electron emission materials and components7US 6,051,165 AIntegrated Thermal Sciences, Inc. · 2000