H01J 49/427
Ejection and selection methods
Official title: {Ejection and selection methods}
H01J49/427 (Ejection and selection methods) appears on 366 US grants and 325 published applications in this corpus.
Search patents in H01J- Granted patents
- 366
- Published applications
- 325
- Assignees
- 100
- Inventors
- 367
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 8 | 0 |
| 1993 | 9 | 0 |
| 1994 | 9 | 0 |
| 1995 | 13 | 0 |
| 1996 | 7 | 0 |
| 1997 | 12 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 2 |
| 2002 | 2 | 4 |
| 2003 | 5 | 9 |
| 2004 | 6 | 7 |
| 2005 | 7 | 7 |
| 2006 | 7 | 4 |
| 2007 | 4 | 8 |
| 2008 | 10 | 11 |
| 2009 | 7 | 15 |
| 2010 | 7 | 14 |
| 2011 | 9 | 12 |
| 2012 | 12 | 10 |
| 2013 | 12 | 11 |
| 2014 | 13 | 17 |
| 2015 | 15 | 15 |
| 2016 | 22 | 25 |
| 2017 | 14 | 16 |
| 2018 | 22 | 15 |
| 2019 | 20 | 18 |
| 2020 | 20 | 18 |
| 2021 | 18 | 24 |
| 2022 | 13 | 14 |
| 2023 | 9 | 9 |
| 2024 | 12 | 21 |
| 2025 | 8 | 9 |
| 2026 | 7 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus and method for ion separation11 Aug 2026US 12,706,292 B2Thermo Finnigan LLC
- Single-sided standing wave for exciting trapped ions28 Jul 2026US 12,695,078 B2Alpine Quantum Technologies GmbH
- Methods of calibrating a mass spectrometer16 Jun 2026US 12,658,416 B2Waters Technologies Ireland Limited
- Capacitive coupling compensation for direct current electrodes in ion traps26 May 2026US 12,640,359 B2Infineon Technologies Austria AG
- Systems and methods for ion injection into an electrostatic trap10 Feb 2026US 12,548,752 B2DH Technologies Development Pte. Ltd.
- Mass spectrometer having parallel precursor ion isolation1 Oct 2026US 2026/0298873 A1Micromass UK Limited
- Apparatus and method for trapping ions27 Aug 2026US 2026/0253859 A1Thermo Finnigan LLC
- Capacitive coupling compensation for direct current electrodes in ion traps20 Aug 2026US 2026/0245855 A1Infineon Technologies Austria AG
- Ion separator6 Aug 2026US 2026/0229478 A1Micromass UK Limited
- Quadrupole mass filters and mass analysers23 Jul 2026US 2026/0213149 A1Micromass UK Limited
Most cited
By later US patents
- Method of mass analyzing a sample by use of a quadrupole ion trap179US 4,540,884 AFinnigan Corporation · 1985
- Axial ejection in a multipole mass spectrometer152US 6,177,668 B1MDS Inc. · 2001
- Tailored excitation for trapped ion mass spectrometry136US 4,761,545 AThe Ohio State University Research Foundation · 1988
- Mass spectrometer108US 6,906,319 B2Micromass UK Limited · 2005
- Method of operating ion trap detector in MS/MS mode107US 4,736,101 AFinnigan Corporation · 1988