H01J 41/18
With ionisation by means of cold cathodes
Official title: with ionisation by means of cold cathodes
H01J41/18 (With ionisation by means of cold cathodes) appears on 55 US grants and 39 published applications in this corpus.
Search patents in H01J- Granted patents
- 55
- Published applications
- 39
- Assignees
- 43
- Inventors
- 121
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 2 |
| 2003 | 3 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 4 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 2 | 1 |
| 2014 | 1 | 2 |
| 2015 | 2 | 2 |
| 2016 | 0 | 3 |
| 2017 | 4 | 2 |
| 2018 | 2 | 4 |
| 2019 | 3 | 3 |
| 2020 | 4 | 1 |
| 2021 | 2 | 1 |
| 2022 | 1 | 2 |
| 2023 | 2 | 1 |
| 2024 | 2 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Plasma source, and atomic clock employing plasma source12 Aug 2025US 12,389,520 B2National Institute of Advanced Industrial Science and Technology
- Thermal control system8 Oct 2024US 12,110,881 B2APR Technologies AB
- Vacuum module and vacuum apparatus and method for regeneration of a volume getter vacuum pump1 Oct 2024US 12,106,950 B2Edwards Vacuum LLC
- Electrohydrodynamic control device25 Jul 2023US 11,708,824 B2APR Technologies AB
- Compact electrostatic ion pump31 Jan 2023US 11,569,077 B2SRI International
- Vacuum pump13 Aug 2026US 2026/0237617 A1Edwards Vacuum LLC
- Magnetic assembly for a sputter ion pump30 Jul 2026US 2026/0221403 A1Edwards Vacuum LLC
- Plasma source, and atomic clock employing plasma source15 Aug 2024US 2024/0276626 A1National Institute of Advanced Industrial Science and Technology
- Vacuum module and vacuum apparatus and method for regeneration of a volume getter vacuum pump23 Mar 2023US 2023/0088465 A1Edwards Vacuum LLC
- Thermal control system25 Aug 2022US 2022/0268529 A1APR Technologies AB
Most cited
By later US patents
- Microminiaturized electrostatic pump85US 5,180,288 AFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. · 1993
- Micromotors, linear motors, micropumps, methods of using the same, microactuators, methods of controlling flow properties of fluids, and apparatuses for controlling flow properties of fluids48US 6,116,257 ANew Technology Management Co., Ltd. · 2000
- Micromotors, linear motors and microactuators for controlling flow properties of fluids32US 6,530,217 B1New Technology Management Co., Ltd. · 2003
- Magnetic field immersion type electron gun21US 5,548,183 AKabushiki Kaisha Toshiba · 1996
- Evacuating device for generating an insulating vacuum around the superconducting winding of a rotor20US 4,274,022 ASiemens Aktiengesellschaft · 1981