H01J 49/4215
Quadrupole mass filters
Official title: {Quadrupole mass filters (H01J49/4225 takes precedence)}
H01J49/4215 (Quadrupole mass filters) appears on 430 US grants and 420 published applications in this corpus.
Search patents in H01J- Granted patents
- 430
- Published applications
- 420
- Assignees
- 137
- Inventors
- 577
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 9 | 0 |
| 2001 | 5 | 3 |
| 2002 | 5 | 4 |
| 2003 | 6 | 7 |
| 2004 | 5 | 6 |
| 2005 | 5 | 7 |
| 2006 | 5 | 7 |
| 2007 | 4 | 7 |
| 2008 | 7 | 8 |
| 2009 | 3 | 4 |
| 2010 | 4 | 5 |
| 2011 | 6 | 12 |
| 2012 | 3 | 3 |
| 2013 | 12 | 14 |
| 2014 | 17 | 15 |
| 2015 | 14 | 19 |
| 2016 | 17 | 31 |
| 2017 | 17 | 24 |
| 2018 | 30 | 19 |
| 2019 | 25 | 25 |
| 2020 | 29 | 37 |
| 2021 | 25 | 28 |
| 2022 | 29 | 40 |
| 2023 | 14 | 26 |
| 2024 | 26 | 31 |
| 2025 | 25 | 19 |
| 2026 | 16 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Mass spectral encoding6 Oct 2026US 12,755,953 B2Micromass UK Limited
- Method of operating a multipole device22 Sep 2026US 12,744,197 B2Thermo Fisher Scientific (Bremen) GmbH
- Mass spectrometer1 Sep 2026US 12,725,774 B2Shimadzu Corporation
- Mass spectrometer isolation profile analyser18 Aug 2026US 12,712,166 B2Thermo Fisher Scientific (Bremen) GmbH
- Space charge reduction in TOF-MS18 Aug 2026US 12,712,173 B2DH Technologies Development Pte. Ltd.
- Method of scheduling ions for analysis8 Oct 2026US 2026/0311990 A1Thermo Finnigan LLC
- Mass spectrometer having parallel precursor ion isolation1 Oct 2026US 2026/0298873 A1Micromass UK Limited
- Multidimensional Variable Scanning SWATH Mass Spectrometry10 Sep 2026US 2026/0269202 A1DH Technologies Development Pte. Ltd.
- Mass spectroscope and method for assembling pre-rods and main rods of mass spectroscope6 Aug 2026US 2026/0229477 A1Hitachi High-Tech Corporation
- Method for extracting volatile material from moon soil, and gas collection system using the same23 Jul 2026US 2026/0210813 A1Korea Institute of Geoscience and Mineral Resources
Most cited
By later US patents
- Methods and apparatus for tandem mass spectrometry255US 6,107,623 AMicromass Limited · 2000
- Mass spectrometer and method and improved ion transmission135US 4,963,736 AMDS Health Group Limited · 1990
- Apparatus and method for focusing and selecting ions and charged particles at or near atmospheric pressure78US 6,784,424 B12004
- Tandem quadrupole mass spectrometer for selected ion fragmentation studies and low energy collision induced dissociator therefor71US 4,234,791 AResearch Corporation · 1980
- Systems and methods for transfer of ions for analysis69US 8,410,431 B2Purdue Research Foundation · 2013