G01N 2291/02809
Concentration of a compound
Official title: Concentration of a compound, e.g. measured by a surface mass change
G01N2291/02809 (Concentration of a compound) appears on 381 US grants and 412 published applications in this corpus.
Search patents in G01N- Granted patents
- 381
- Published applications
- 412
- Assignees
- 303
- Inventors
- 1,047
- Latest grant
- 11 Aug 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 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 5 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 7 | 1 |
| 2002 | 6 | 5 |
| 2003 | 9 | 20 |
| 2004 | 12 | 11 |
| 2005 | 12 | 9 |
| 2006 | 7 | 11 |
| 2007 | 8 | 8 |
| 2008 | 8 | 6 |
| 2009 | 4 | 21 |
| 2010 | 13 | 12 |
| 2011 | 5 | 8 |
| 2012 | 9 | 10 |
| 2013 | 9 | 10 |
| 2014 | 11 | 12 |
| 2015 | 7 | 10 |
| 2016 | 10 | 16 |
| 2017 | 10 | 12 |
| 2018 | 8 | 21 |
| 2019 | 11 | 28 |
| 2020 | 18 | 41 |
| 2021 | 23 | 27 |
| 2022 | 29 | 30 |
| 2023 | 22 | 34 |
| 2024 | 23 | 21 |
| 2025 | 25 | 18 |
| 2026 | 11 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wet gas holdup gas fraction and flow meter11 Aug 2026US 12,704,396 B2Saudi Arabian Oil Company
- 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
- Photoacoustic gas sensor device30 Jun 2026US 12,669,430 B2Sensirion AG
- Optical sensor system19 May 2026US 12,631,548 B2Asahi Kasei Microdevices Corporation
- Ultrasonic probe, pneumatically driven liquid metering injection apparatus, and control and fault-diagnosis method for pneumatically driven liquid metering injection based on ultrasonic sensing24 Sep 2026US 2026/0287557 A1ShenZhen KEWEI Neo_Tech Co.,Ltd.
- Physical quantity measurement system10 Sep 2026US 2026/0266641 A1Panasonic Intellectual Property Management Co., Ltd.
- Physical quantity measurement system10 Sep 2026US 2026/0266750 A1Panasonic Intellectual Property Management Co., Ltd.
- Determining the concentration of residuals in the effluent of a solid-liquid separation process by ultrasound27 Aug 2026US 2026/0251616 A1
- Hydrogen flow/concentration meter13 Aug 2026US 2026/0235428 A1Panasonic Intellectual Property Management Co., Ltd.
Most cited
By later US patents
- Indirect calorimeter for medical applications391US 6,629,934 B2Healthetech, Inc. · 2003
- Method and apparatus for material analysis267US 5,348,002 ASirraya, Inc. · 1994
- Gas concentration sensor and control for oxygen concentrator utilizing gas concentration sensor139US 5,917,135 AInvacare Corporation · 1999
- Particle imaging systems and methods using acoustic radiation pressure102US 8,134,705 B2Life Technologies Corporation · 2012
- Particle quantifying systems and methods using acoustic radiation pressure99US 8,309,408 B2Life Technologies Corporation · 2012