H01J 49/4225
Multipole linear ion traps
Official title: {Multipole linear ion traps, e.g. quadrupoles, hexapoles}
H01J49/4225 (Multipole linear ion traps) appears on 348 US grants and 379 published applications in this corpus.
Search patents in H01J- Granted patents
- 348
- Published applications
- 379
- Assignees
- 112
- Inventors
- 461
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 6 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 5 |
| 2003 | 4 | 8 |
| 2004 | 9 | 12 |
| 2005 | 8 | 19 |
| 2006 | 17 | 11 |
| 2007 | 10 | 17 |
| 2008 | 17 | 18 |
| 2009 | 14 | 11 |
| 2010 | 14 | 9 |
| 2011 | 5 | 5 |
| 2012 | 5 | 4 |
| 2013 | 5 | 8 |
| 2014 | 7 | 8 |
| 2015 | 14 | 11 |
| 2016 | 13 | 22 |
| 2017 | 10 | 14 |
| 2018 | 12 | 15 |
| 2019 | 20 | 19 |
| 2020 | 19 | 37 |
| 2021 | 34 | 39 |
| 2022 | 28 | 25 |
| 2023 | 22 | 19 |
| 2024 | 23 | 21 |
| 2025 | 16 | 15 |
| 2026 | 7 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High-voltage RF generator for ion optics1 Sep 2026US 12,725,775 B2Thermo Fisher Scientific (Bremen) GmbH
- Radially segmented ion guide and example applications thereof18 Aug 2026US 12,712,171 B2The Trustees of Indiana University
- Apparatus and method for ion separation11 Aug 2026US 12,706,292 B2Thermo Finnigan LLC
- Reducing AC effects on ions entering ion guide with pulsing auxiliary AC11 Aug 2026US 12,706,293 B2DH Technologies Development Pte. Ltd.
- Systems and methods for ion injection into an electrostatic trap10 Feb 2026US 12,548,752 B2DH Technologies Development Pte. Ltd.
- Apparatus and method for trapping ions27 Aug 2026US 2026/0253859 A1Thermo Finnigan LLC
- Systems and methods for determination of oligonucleotide sequence by tandem mass spectrometry13 Aug 2026US 2026/0237623 A1
- Mass spectroscope and method for assembling pre-rods and main rods of mass spectroscope6 Aug 2026US 2026/0229477 A1Hitachi High-Tech Corporation
- A mass spectrometer and a method for analyzing a sample therein16 Jul 2026US 2026/0204534 A1Teledyne FLIR Defense, Inc.
- Quadrupole mass filter30 Apr 2026US 2026/0121011 A1Thermo Fisher Scientific (Bremen) GmbH
Most cited
By later US patents
- Spectrometer with axial field183US 5,847,386 AMDS Inc. · 1998
- Axial ejection in a multipole mass spectrometer152US 6,177,668 B1MDS Inc. · 2001
- Mass spectrometry with multipole ion guides129US 6,753,523 B1Analytica of Branford, Inc. · 2004
- Quadrupole with axial DC field127US 6,111,250 AMDS Health Group Limited · 2000
- Mass spectrometry with segmented RF multiple ion guides in various pressure regions127US 7,034,292 B1Analytica of Branford, Inc. · 2006