H01J 49/4265
Controlling the number of trapped ions
Official title: {Controlling the number of trapped ions; preventing space charge effects}
H01J49/4265 (Controlling the number of trapped ions) appears on 134 US grants and 136 published applications in this corpus.
Search patents in H01J- Granted patents
- 134
- Published applications
- 136
- Assignees
- 55
- Inventors
- 193
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 5 | 2 |
| 2004 | 1 | 5 |
| 2005 | 0 | 1 |
| 2006 | 3 | 2 |
| 2007 | 1 | 0 |
| 2008 | 1 | 6 |
| 2009 | 6 | 8 |
| 2010 | 2 | 4 |
| 2011 | 4 | 3 |
| 2012 | 0 | 4 |
| 2013 | 7 | 5 |
| 2014 | 7 | 11 |
| 2015 | 7 | 6 |
| 2016 | 8 | 7 |
| 2017 | 4 | 4 |
| 2018 | 7 | 5 |
| 2019 | 4 | 5 |
| 2020 | 4 | 9 |
| 2021 | 8 | 11 |
| 2022 | 12 | 11 |
| 2023 | 9 | 9 |
| 2024 | 6 | 8 |
| 2025 | 9 | 6 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Space charge reduction in TOF-MS18 Aug 2026US 12,712,173 B2DH Technologies Development Pte. Ltd.
- Mass spectrometry apparatus and mass spectrometry method for adjusting ion accumulation times based on detection intensity17 Feb 2026US 12,555,762 B2JEOL Ltd.
- Method for driving linear ion trap and mass spectrometer30 Dec 2025US 12,512,311 B2Shimadzu Corporation
- Segmented movement control electrodes in ion traps18 Nov 2025US 12,476,104 B2Infineon Technologies Austria AG
- Ion accumulation control for analytical instrument7 Oct 2025US 12,437,984 B2Thermo Fisher Scientific (Bremen) GmbH
- Analytical instrument with switchable detection circuitry16 Jul 2026US 2026/0204530 A1Thermo Fisher Scientific (Bremen) GmbH
- Method for averaging and ion accumulation4 Jun 2026US 2026/0155342 A1Thermo Fisher Scientific (Bremen) GmbH
- A charge detection mass spectrometry (cdms) device22 Jan 2026US 2026/0024738 A1Micromass UK Limited
- Ion accumulation control for analytical instrument27 Nov 2025US 2025/0364238 A1Thermo Fisher Scientific (Bremen) GmbH
- Automatic ion control for charge detection mass spectrometry17 Jul 2025US 2025/0232972 A1Northwestern University
Most cited
By later US patents
- Multipole inlet system for ion traps114US 5,179,278 AMDS Health Group Limited · 1993
- Method and apparatus of increasing dynamic range and sensitivity of a mass spectrometer92US 5,572,022 AFinnigan Corporation · 1996
- Method of increasing the dynamic range and sensitivity of a quadrupole ion trap mass spectrometer62US 5,107,109 AFinnigan Corporation · 1992
- Method of increasing the dynamic range and sensitivity of a quadrupole ion trap mass spectrometer operating in the chemical ionization mode56US 4,771,172 AFinnigan Corporation · 1988
- Three-dimensional quadrupole mass spectrometer55US 5,747,800 AHitachi, Ltd. · 1998