H01J 1/142
With alkaline-earth metal oxides, or such oxides used in conjunction with reducing
Official title: with alkaline-earth metal oxides, or such oxides used in conjunction with reducing agents, as an emissive material
H01J1/142 (With alkaline-earth metal oxides, or such oxides used in conjunction with reducing) appears on 58 US grants and 23 published applications in this corpus.
Search patents in H01J- Granted patents
- 58
- Published applications
- 23
- Assignees
- 32
- Inventors
- 135
- Latest grant
- 18 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 5 | 2 |
| 2002 | 6 | 3 |
| 2003 | 6 | 5 |
| 2004 | 3 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 0 |
| 2020 | 2 | 1 |
| 2021 | 2 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- High-temperature component18 Feb 2025US 12,227,829 B2Plansee SE
- 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
- Method of fabricating tungsten scandate nano-composite powder for cathodes14 Jul 2020US 10,714,292 B2The Regents of the University of California
- Thermionic cathode with a graphene sealing layer and method of making the same9 Jun 2020US 10,679,816 B1Triad National Security, LLC
- High-temperature component27 Jul 2023US 2023/0235442 A1Plansee SE
- Thermionic emission device and method for making the same15 Jul 2021US 2021/0217572 A1Hon Hai Precision Industry Co., Ltd.
- 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
- Target for barium-scandate dispenser cathode7 Jun 2018US 2018/0158639 A1Koninklijke Philips N. V.
- Method of fabricating tungsten scandate nano-composite powder for cathodes14 Dec 2017US 2017/0358419 A1The Regents of the University of California
Most cited
By later US patents
- EL sheet diaphragm and a switch using the same54US 5,871,088 AMatsushita Electric Industrial Co., Ltd. · 1999
- Cathode for electron tube32US 4,797,593 AMitsubishi Denki Kabushiki Kaisha · 1989
- Cathode for electron tube23US 4,924,137 AMitsubishi Denki Kabushiki Kaisha · 1990
- Electron emission materials and components17US 5,911,919 AIntegrated Thermal Sciences, Inc. · 1999
- Electron tube cathode14US 5,118,984 AMitsubishi Denki Kabushiki Kaisha · 1992