H01J 37/242
Filament heating power supply or regulation circuits
Official title: {Filament heating power supply or regulation circuits (H01J37/241 takes precedence)}
H01J37/242 (Filament heating power supply or regulation circuits) appears on 17 US grants and 24 published applications in this corpus.
Search patents in H01J- Granted patents
- 17
- Published applications
- 24
- Assignees
- 25
- Inventors
- 64
- Latest grant
- 31 May 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 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 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 2 | 4 |
| 2007 | 2 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 3 |
| 2018 | 1 | 1 |
| 2019 | 1 | 0 |
| 2020 | 2 | 1 |
| 2021 | 0 | 2 |
| 2022 | 2 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 2 |
| 2025 | 0 | 1 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- X-ray system and method of inspecting X-ray tube7 Apr 2020US 10,614,996 B2Canon Electron Tubes & Devices Co., Ltd.
- Additive manufacturing of three-dimensional articles7 Jan 2020US 10,525,531 B2Arcam AB
- Sterilization machine and method for sterilizing packaging containers12 Mar 2019US 10,226,540 B2Tetra Laval Holdings & Finance S. A.
- Sample chamber heating assembly1 Oct 2026US 2026/0302127 A1
- Electron emission apparatus and electronic apparatus10 Sep 2026US 2026/0269164 A1Westlake University
- Gas cluster ion beam apparatus4 Jun 2026US 2026/0155330 A1IIPT Inc.
- Heating assembly for charged particle beam system4 Sep 2025US 2025/0279259 A1FEI Company
- Ion source structure of ion implanter and its operation method11 Jul 2024US 2024/0234079 A9United Semiconductor (Xiamen) Co., Ltd.
Most cited
By later US patents
- Setting the electron gun cathode heating current of an electron beam machine13US 4,317,983 ASteigerwald Strahltechnik GmbH · 1982
- Radiantly heated cathode for an electron gun and heating assembly11US 7,250,618 B2Nikon Corporation · 2007
- Method of predicting a lifetime of filament in ion source and ion source device7US 7,034,543 B2Nissin Electric Co., Ltd. · 2006
- Servo control for high emittance electron source6US 6,590,216 B1Nikon Corporation · 2003
- Electron beam apparatus and device manufacturing method using same5US 6,998,611 B2Ebara Corporation · 2006