G01N 21/61
Non-dispersive gas analysers
Official title: Non-dispersive gas analysers {(G01N21/3504 takes precedence)}
G01N21/61 (Non-dispersive gas analysers) appears on 261 US grants and 271 published applications in this corpus.
Search patents in G01N- Granted patents
- 261
- Published applications
- 271
- Assignees
- 195
- Inventors
- 624
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 5 | 1 |
| 2003 | 2 | 1 |
| 2004 | 0 | 2 |
| 2005 | 2 | 3 |
| 2006 | 4 | 4 |
| 2007 | 3 | 8 |
| 2008 | 6 | 6 |
| 2009 | 4 | 3 |
| 2010 | 2 | 3 |
| 2011 | 3 | 7 |
| 2012 | 6 | 8 |
| 2013 | 2 | 16 |
| 2014 | 11 | 17 |
| 2015 | 14 | 13 |
| 2016 | 14 | 12 |
| 2017 | 17 | 22 |
| 2018 | 14 | 17 |
| 2019 | 16 | 12 |
| 2020 | 10 | 18 |
| 2021 | 16 | 21 |
| 2022 | 12 | 20 |
| 2023 | 20 | 17 |
| 2024 | 15 | 10 |
| 2025 | 12 | 13 |
| 2026 | 7 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Optical density measuring apparatus7 Jul 2026US 12,674,755 B2Asahi Kasei Microdevices Corporation
- Measurement of gaseous/volatile hydrocarbon concentrations26 May 2026US 12,638,383 B2Schlumberger Technology Corporation
- Optical sensor system19 May 2026US 12,631,548 B2Asahi Kasei Microdevices Corporation
- System and method for mainstream exhaled oxygen sensor12 May 2026US 12,622,600 B2The Trustees of Princeton University
- Device for measuring the humidity in the internal volume of a watch case10 Feb 2026US 12,546,716 B2The Swatch Group Research and Development Ltd
- Optical density measuring apparatus1 Oct 2026US 2026/0298822 A1Asahi Kasei Microdevices Corporation
- System and method for processing natural gas to remove carbon and produce hydrogen17 Sep 2026US 2026/0274660 A1BIA Integrated Solutions, Inc.
- Light-guiding member and gas sensor13 Aug 2026US 2026/0235514 A1Asahi Kasei Microdevices Corporation
- Gas sensor13 Aug 2026US 2026/0235566 A1Asahi Kasei Microdevices Corporation
- Modular landfill gas measurement6 Aug 2026US 2026/0227324 A1EcoTec Solutions, Inc.
Most cited
By later US patents
- Solid-state spectrometer230US 11,692,934 B2Masimo Corporation · 2023
- Non-dispersive infrared gas sensor79US 6,469,303 B1RAE Systems, Inc. · 2002
- Multiple component gas analyzer76US 4,914,719 ACriticare Systems, Inc. · 1990
- Infrared radiation sources, sensors and source combinations, and methods of manufacture73US 7,119,337 B1Ion Optics, Inc. · 2006
- NDIR gas sensor59US 5,834,777 ATelaire Systems, Inc. · 1998