H01J 41/00
Discharge tubes for measuring pressure of introduced gas or for detecting presence
Official title: Discharge tubes for measuring pressure of introduced gas {or for detecting presence of gas}; Discharge tubes for evacuation by diffusion of ions
H01J41/00 (Discharge tubes for measuring pressure of introduced gas or for detecting presence) appears on 251 US grants and 172 published applications in this corpus.
Search patents in H01J- Granted patents
- 251
- Published applications
- 172
- Assignees
- 141
- Inventors
- 428
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 7 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 9 | 2 |
| 2002 | 5 | 4 |
| 2003 | 7 | 2 |
| 2004 | 3 | 3 |
| 2005 | 2 | 4 |
| 2006 | 5 | 10 |
| 2007 | 4 | 4 |
| 2008 | 4 | 4 |
| 2009 | 2 | 5 |
| 2010 | 6 | 10 |
| 2011 | 1 | 7 |
| 2012 | 5 | 4 |
| 2013 | 6 | 3 |
| 2014 | 4 | 8 |
| 2015 | 4 | 11 |
| 2016 | 8 | 11 |
| 2017 | 10 | 13 |
| 2018 | 12 | 11 |
| 2019 | 17 | 7 |
| 2020 | 11 | 11 |
| 2021 | 12 | 4 |
| 2022 | 7 | 10 |
| 2023 | 7 | 7 |
| 2024 | 12 | 7 |
| 2025 | 3 | 3 |
| 2026 | 4 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Vibration damping and resonance reduction for ion pump23 Jun 2026US 12,665,177 B2ASML Netherlands B. V.
- Heat transfer using ionic pumps19 May 2026US 12,633,506 B2Ventiva, Inc.
- Snap-on getter pump assembly and its use31 Mar 2026US 12,590,577 B2Saes Getters S. P. A.
- Modular getters and getters with different materials in vacuum enclosures31 Mar 2026US 12,592,354 B2Varex Imaging Corporation
- Plasma source, and atomic clock employing plasma source12 Aug 2025US 12,389,520 B2National Institute of Advanced Industrial Science and Technology
- Ion pump with monitoring system17 Sep 2026US 2026/0279748 A1Agilent Technologies, Inc.
- Pumping system including an ion pump and method for operating a pumping system including an ion pump20 Aug 2026US 2026/0245846 A1Agilent Technologies, Inc.
- Vacuum pump13 Aug 2026US 2026/0237617 A1Edwards Vacuum LLC
- Magnetic assembly for a sputter ion pump30 Jul 2026US 2026/0221403 A1Edwards Vacuum LLC
- Ion pump with a monitoring system and method for operating the ion pump14 May 2026US 2026/0135071 A1Agilent Technologies, Inc.
Most cited
By later US patents
- Microminiaturized electrostatic pump85US 5,180,288 AFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. · 1993
- Charged particle beam apparatus55US 7,582,885 B2Hitachi High-Technologies Corporation · 2009
- Synchrotron radiation generation apparatus53US 5,036,290 AHitachi, Ltd. · 1991
- 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
- Flywheel system with parallel pumping arrangement41US 6,347,925 B1Beacon Power Corporation · 2002