H01J 49/422
Two-dimensional rf ion traps
Official title: {Two-dimensional RF ion traps (ion guides without mass selection H01J49/062)}
H01J49/422 (Two-dimensional rf ion traps) appears on 583 US grants and 630 published applications in this corpus.
Search patents in H01J- Granted patents
- 583
- Published applications
- 630
- Assignees
- 159
- Inventors
- 681
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 0 | 0 |
| 2000 | 8 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 6 |
| 2003 | 4 | 10 |
| 2004 | 11 | 18 |
| 2005 | 12 | 23 |
| 2006 | 20 | 13 |
| 2007 | 13 | 24 |
| 2008 | 26 | 32 |
| 2009 | 20 | 29 |
| 2010 | 20 | 16 |
| 2011 | 17 | 21 |
| 2012 | 15 | 13 |
| 2013 | 22 | 14 |
| 2014 | 20 | 23 |
| 2015 | 28 | 24 |
| 2016 | 27 | 33 |
| 2017 | 22 | 29 |
| 2018 | 27 | 25 |
| 2019 | 33 | 33 |
| 2020 | 30 | 50 |
| 2021 | 49 | 53 |
| 2022 | 42 | 33 |
| 2023 | 30 | 35 |
| 2024 | 32 | 34 |
| 2025 | 28 | 24 |
| 2026 | 11 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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.
- Micromotion and stray field compensation of a trapped ion chain16 Jun 2026US 12,657,497 B2IonQ, Inc.
- Mass-to-Charge Value-based Setting of DC Voltage Magnitudes for an Ion Guide27 Aug 2026US 2026/0253858 A1Thermo Finnigan LLC
- Apparatus and method for trapping ions27 Aug 2026US 2026/0253859 A1Thermo Finnigan LLC
- Charged particle trap apparatus27 Aug 2026US 2026/0253860 A1Oxford Ionics Limited
- Capacitive coupling compensation for direct current electrodes in ion traps20 Aug 2026US 2026/0245855 A1Infineon Technologies Austria AG
- Systems and methods for determination of oligonucleotide sequence by tandem mass spectrometry13 Aug 2026US 2026/0237623 A1
Most cited
By later US patents
- Ion trap mass spectrometer system and method218US 5,420,425 AFinnigan Corporation · 1995
- Spectrometer with axial field183US 5,847,386 AMDS Inc. · 1998
- Axial ejection in a multipole mass spectrometer152US 6,177,668 B1MDS Inc. · 2001
- Method and device for orthogonal ion injection into a time-of-flight mass spectrometer129US 5,763,878 ABruker-Franzen Analytik GmbH · 1998
- Mass spectrometry with multipole ion guides129US 6,753,523 B1Analytica of Branford, Inc. · 2004