G01N 21/3518
Devices using gas filter correlation techniques
Official title: Devices using gas filter correlation techniques; Devices using gas pressure modulation techniques
G01N21/3518 (Devices using gas filter correlation techniques) appears on 148 US grants and 124 published applications in this corpus.
Search patents in G01N- Granted patents
- 148
- Published applications
- 124
- Assignees
- 132
- Inventors
- 311
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 8 |
| 2004 | 8 | 6 |
| 2005 | 5 | 5 |
| 2006 | 5 | 5 |
| 2007 | 1 | 2 |
| 2008 | 3 | 4 |
| 2009 | 4 | 5 |
| 2010 | 3 | 9 |
| 2011 | 6 | 3 |
| 2012 | 8 | 6 |
| 2013 | 4 | 5 |
| 2014 | 5 | 3 |
| 2015 | 2 | 3 |
| 2016 | 4 | 2 |
| 2017 | 2 | 5 |
| 2018 | 3 | 9 |
| 2019 | 11 | 6 |
| 2020 | 3 | 10 |
| 2021 | 5 | 4 |
| 2022 | 7 | 8 |
| 2023 | 6 | 4 |
| 2024 | 3 | 8 |
| 2025 | 2 | 1 |
| 2026 | 6 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for blockage detection in gas detectors18 Aug 2026US 12,710,348 B2Detector Electronics Buyer US, LLC
- System, method, and computer program product for utilizing a fiber bragg grating to detect a gas indicating the onset of thermal runaway14 Jul 2026US 12,680,951 B2Honeywell International Inc.
- Multi-directional open path detector system and method of using the same16 Jun 2026US 12,656,206 B2Honeywell International Inc.
- Electronic devices with breath sensing systems31 Mar 2026US 12,588,830 B1Apple Inc.
- Inspection support method, inspection support apparatus, and inspection support program17 Mar 2026US 12,578,698 B2Konica Minolta, Inc.
- Gas correlation filter wheel and gas analyzer5 Mar 2026US 2026/0063542 A1Fuji Electric Co., Ltd.
- Gas Measurement Device29 Jan 2026US 2026/0029338 A1Shimadzu Corporation
- Isotope ratio measuring device using isotope notch filter22 Jan 2026US 2026/0023012 A1Korea Atomic Energy Research Institute
- Infrared gas analyzer, and infrared gas analysis method16 Oct 2025US 2025/0321184 A1Horiba, Ltd.
- Optical gas sensor device, gas sensing method and storage medium19 Dec 2024US 2024/0418648 A1Mitsumi Electric Co., Ltd.
Most cited
By later US patents
- Passive and active infrared analysis gas sensors and applicable multichannel detector assembles97US 5,721,430 AEngelhard Sensor Technologies, Inc. · 1998
- System and method for remote sensing and/or analyzing spectral properties of targets and/or chemical species for detection and identification thereof97US 7,315,377 B2University of Virginia Patent Foundation · 2008
- Method and apparatus for sample analysis97US 7,621,171 B2State of Oregon acting by and through the State Board of Higher Education on behalf of Portland State University · 2009
- Apparatus for observing combustion conditions in a gas turbine engine64US 7,484,369 B2Rosemount Aerospace Inc. · 2009
- Thermography camera tuned to detect absorption of infrared radiation in a selected spectral bandwidth64US 8,653,461 B1FLIR Systems, Inc. · 2014