H01J 9/042
Manufacture, activation of the emissive part
Official title: {Manufacture, activation of the emissive part}
H01J9/042 (Manufacture, activation of the emissive part) appears on 165 US grants and 78 published applications in this corpus.
Search patents in H01J- Granted patents
- 165
- Published applications
- 78
- Assignees
- 101
- Inventors
- 413
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 7 | 0 |
| 1991 | 11 | 0 |
| 1992 | 7 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 3 |
| 2002 | 5 | 6 |
| 2003 | 2 | 3 |
| 2004 | 8 | 3 |
| 2005 | 1 | 6 |
| 2006 | 1 | 2 |
| 2007 | 3 | 2 |
| 2008 | 1 | 3 |
| 2009 | 0 | 1 |
| 2010 | 3 | 3 |
| 2011 | 1 | 2 |
| 2012 | 1 | 4 |
| 2013 | 3 | 4 |
| 2014 | 1 | 1 |
| 2015 | 3 | 3 |
| 2016 | 3 | 4 |
| 2017 | 4 | 3 |
| 2018 | 5 | 3 |
| 2019 | 2 | 3 |
| 2020 | 6 | 3 |
| 2021 | 6 | 3 |
| 2022 | 3 | 4 |
| 2023 | 1 | 3 |
| 2024 | 2 | 4 |
| 2025 | 7 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method of manufacturing a filament, filament manufactured thereby, and x-ray tube having the filament14 Oct 2025US 12,444,565 B2Remedi Co., Ltd.
- Cathode member for electron beam generation, and method for manufacturing the same7 Oct 2025US 12,437,953 B2Kobelco Research Institute, Inc.
- Method and system for preparing cathode material1 Apr 2025US 12,263,635 B2Wuhan United Imaging Healthcare Co., Ltd.
- Method and apparatus for reducing the work function of polycrystalline metal hexaboride25 Feb 2025US 12,237,137 B2California Institute of Technology
- Monolithic heater for thermionic electron cathode25 Feb 2025US 12,237,138 B2Applied Physics Technologies, Inc.
- 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.
- 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
- Method of manufacturing a filament, filament manufactured thereby, and x-ray tube having the filament11 Jul 2024US 2024/0234070 A1Remedi Co., Ltd.
- Monolithic heater for thermionic electron cathode27 Jun 2024US 2024/0212964 A1Applied Physics Technologies, Inc.
Most cited
By later US patents
- EL sheet diaphragm and a switch using the same54US 5,871,088 AMatsushita Electric Industrial Co., Ltd. · 1999
- Attaching self-supporting emissive film to cathode support36US 4,197,152 AGTE Sylvania Incorporated · 1980
- Nonaqueous suspension for electrophoretic deposition of powders26US 4,482,447 ASony Corporation · 1984
- Method for depositing cathode material on a wire cathode23US 5,714,051 AU. S. Philips Corporation · 1998
- Electron emitting device having a polycrystalline silicon resistor coated with a silicide and an oxide of a work function reducing material22US 5,559,342 ACanon Kabushiki Kaisha · 1996