G01N 2291/021
Gases
G01N2291/021 (Gases) appears on 495 US grants and 555 published applications in this corpus.
Search patents in G01N- Granted patents
- 495
- Published applications
- 555
- Assignees
- 354
- Inventors
- 1,211
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 8 | 0 |
| 1995 | 5 | 0 |
| 1996 | 9 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 7 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 1 |
| 2002 | 15 | 14 |
| 2003 | 10 | 15 |
| 2004 | 9 | 17 |
| 2005 | 13 | 16 |
| 2006 | 16 | 11 |
| 2007 | 12 | 20 |
| 2008 | 8 | 13 |
| 2009 | 5 | 15 |
| 2010 | 14 | 20 |
| 2011 | 6 | 16 |
| 2012 | 13 | 14 |
| 2013 | 10 | 11 |
| 2014 | 20 | 8 |
| 2015 | 7 | 24 |
| 2016 | 9 | 26 |
| 2017 | 20 | 28 |
| 2018 | 14 | 33 |
| 2019 | 30 | 36 |
| 2020 | 33 | 46 |
| 2021 | 36 | 39 |
| 2022 | 32 | 30 |
| 2023 | 27 | 32 |
| 2024 | 26 | 27 |
| 2025 | 29 | 32 |
| 2026 | 13 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Devices and methods for quartz enhanced photoacoustic spectroscopy6 Oct 2026US 12,756,156 B2Pendar Technologies, LLC
- Sensor, method and computer program for determining the density or composition of a fluid29 Sep 2026US 12,748,075 B2WoePal GmbH
- Dual-gas metering system and method21 Jul 2026US 12,687,519 B2Itron, Inc.
- Methods and systems for acoustic determination of gas composition21 Jul 2026US 12,687,525 B2Saudi Arabian Oil Company
- Autonomous real-time sulfur dioxide and carbon dioxide monitor for marine exhaust emissions14 Jul 2026US 12,680,912 B2Seaarctos Holdings, LLC
- Physical quantity measurement system10 Sep 2026US 2026/0266641 A1Panasonic Intellectual Property Management Co., Ltd.
- Information processing method, information processing system, information processing device, and program3 Sep 2026US 2026/0260402 A1Revorn Co., Ltd.
- Hydrogen flow/concentration meter13 Aug 2026US 2026/0235428 A1Panasonic Intellectual Property Management Co., Ltd.
- Gas sensing sytem and method6 Aug 2026US 2026/0227363 A1Nditive3D Inc.
- Method and device for determining substance proportions of a fluid mixture of substances and medical device30 Jul 2026US 2026/0216464 A1Corscience GmbH & Co. KG
Most cited
By later US patents
- Gas sensor207US 5,351,522 AAequitron Medical, Inc. · 1994
- Apparatus, systems and methods for detecting and transmitting sensory data over a computer network184US 7,089,780 B2Smiths Detection Inc. · 2006
- Smart sensor system and method using a surface acoustic wave vapor sensor array and pattern recognition for selective trace organic vapor detection160US 5,469,369 AThe United States of America as represented by the Secretary of the Navy · 1995
- Gas concentration sensor and control for oxygen concentrator utilizing gas concentration sensor139US 5,917,135 AInvacare Corporation · 1999
- Apparatus, systems and methods for detecting and transmitting sensory data over a computer network119US 6,422,061 B1Cyrano Sciences, Inc. · 2002