H01J 49/4285
Applying a resonant signal
Official title: {Applying a resonant signal, e.g. selective resonant ejection matching the secular frequency of ions (H01J49/429, H01J49/428 take precedence)}
H01J49/4285 (Applying a resonant signal) appears on 42 US grants and 31 published applications in this corpus.
Search patents in H01J- Granted patents
- 42
- Published applications
- 31
- Assignees
- 25
- Inventors
- 58
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 3 |
| 2014 | 1 | 1 |
| 2015 | 1 | 4 |
| 2016 | 6 | 3 |
| 2017 | 0 | 5 |
| 2018 | 6 | 1 |
| 2019 | 3 | 1 |
| 2020 | 0 | 2 |
| 2021 | 3 | 2 |
| 2022 | 2 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 2 |
| 2025 | 0 | 0 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Capacitive coupling compensation for direct current electrodes in ion traps26 May 2026US 12,640,359 B2Infineon Technologies Austria AG
- Ion cyclotron resonance separator apparatus and method of use thereof20 Jan 2026US 12,531,228 B2
- Coupled-amplifier multi-frequency circuit topologies applicable to mass spectrometer radio-frequency drive systems19 Mar 2024US 11,935,735 B2Agilent Technologies, Inc.
- Coupled-amplifier multi-frequency circuit topologies applicable to mass spectrometer radio-frequency drive systems16 Aug 2022US 11,418,228 B2Agilent Technologies, Inc.
- Ion traps that apply an inverse mathieu q scan29 Mar 2022US 11,289,321 B2Purdue Research Foundation
- Capacitive coupling compensation for direct current electrodes in ion traps20 Aug 2026US 2026/0245855 A1Infineon Technologies Austria AG
- Capacitive Coupling Compensation for Direct Current Electrodes in Ion Traps5 Dec 2024US 2024/0404820 A1Infineon Technologies Austria AG
- Ion cyclotron resonance separator apparatus and method of use thereof19 Sep 2024US 2024/0312773 A1
- Coupled-amplifier multi-frequency circuit topologies applicable to mass spectrometer radio-frequency drive systems10 Nov 2022US 2022/0360286 A1Agilent Technologies, Inc.
- Ion traps that apply an inverse mathieu q scan18 Feb 2021US 2021/0050206 A1Purdue Research Foundation
Most cited
By later US patents
- Method of detecting ions in an ion trap mass spectrometer46US 5,285,063 AFinnigan Corporation · 1994
- High pressure MS/MS system44US 6,093,929 AMDS Inc. · 2000
- Method and apparatus for mass analysis in a multipole mass spectrometer42US 5,089,703 AFinnigan Corporation · 1992
- Quadrupole trap improved technique for ion isolation35US 5,198,665 AVarian Associates, Inc. · 1993
- Mass spectrometry method using supplemental AC voltage signals34US 5,200,613 ATeledyne MEC · 1993