G01N 29/02
Analysing fluids
Official title: Analysing fluids (using acoustic emission techniques G01N29/14 {; constructional or flow details for analysing fluids G01N29/222; optoacoustic fluid cells G01N29/2425})
G01N29/02 (Analysing fluids) appears on 3,136 US grants and 3,101 published applications in this corpus.
Search patents in G01N- Granted patents
- 3,136
- Published applications
- 3,101
- Assignees
- 1,552
- Inventors
- 6,598
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 8 | 0 |
| 1978 | 12 | 0 |
| 1979 | 11 | 0 |
| 1980 | 14 | 0 |
| 1981 | 9 | 0 |
| 1982 | 13 | 0 |
| 1983 | 17 | 0 |
| 1984 | 12 | 0 |
| 1985 | 15 | 0 |
| 1986 | 21 | 0 |
| 1987 | 18 | 0 |
| 1988 | 24 | 0 |
| 1989 | 18 | 0 |
| 1990 | 16 | 0 |
| 1991 | 26 | 0 |
| 1992 | 22 | 0 |
| 1993 | 36 | 0 |
| 1994 | 34 | 0 |
| 1995 | 34 | 0 |
| 1996 | 34 | 0 |
| 1997 | 28 | 0 |
| 1998 | 46 | 0 |
| 1999 | 44 | 0 |
| 2000 | 52 | 0 |
| 2001 | 68 | 12 |
| 2002 | 67 | 55 |
| 2003 | 59 | 79 |
| 2004 | 52 | 99 |
| 2005 | 68 | 94 |
| 2006 | 69 | 109 |
| 2007 | 72 | 104 |
| 2008 | 66 | 98 |
| 2009 | 62 | 111 |
| 2010 | 92 | 118 |
| 2011 | 76 | 103 |
| 2012 | 89 | 108 |
| 2013 | 90 | 90 |
| 2014 | 89 | 116 |
| 2015 | 80 | 125 |
| 2016 | 83 | 123 |
| 2017 | 118 | 168 |
| 2018 | 100 | 170 |
| 2019 | 155 | 181 |
| 2020 | 176 | 208 |
| 2021 | 142 | 189 |
| 2022 | 176 | 163 |
| 2023 | 155 | 165 |
| 2024 | 142 | 132 |
| 2025 | 137 | 114 |
| 2026 | 78 | 67 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01N 29/036By measuring frequency or resonance of acoustic waves1,200
- G01N 29/022Fluid sensors based on microsensors1,119
- G01N 29/024By measuring propagation velocity or propagation time of acoustic waves825
- G01N 29/032By measuring attenuation of acoustic waves570
- G01N 29/028By measuring mechanical or acoustic impedance60
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
- System and method for deconvolution of real-time mass from the influence of temperature and pressure on crystal microbalance15 Sep 2026US 12,736,503 B2Inficon GmbH
- Sensors incorporated into adhesive material15 Sep 2026US 12,736,504 B2Lyten, Inc.
- Sensing devices1 Sep 2026US 12,726,755 B2Shenzhen Shokz Co., Ltd.
- Fluid cell device and method for measuring drilling mud properties8 Oct 2026US 2026/0309674 A1
- Robotic Signature Analysis (RSA)8 Oct 2026US 2026/0309679 A1
- Characterizing channel cleaning efficacy1 Oct 2026US 2026/0294226 A1Saban Ventures Pty Limited
- System and method for acoustic spectroscopy for fluid measurement1 Oct 2026US 2026/0298880 A1Petroleo Brasileiro S.A. - Petrobras
- Resonant acoustic rheometry for characterization of soft viscoelastic materials24 Sep 2026US 2026/0287554 A1The Regents of the University of Michigan
Most cited
By later US patents
- Cassette for intravenous-line flow-control system453US 6,165,154 ADEKA Products Limited Partnership · 2000
- Microfabricated reactor427US 5,639,423 AThe Regents of the University of Calfornia · 1997
- Indirect calorimeter for medical applications391US 6,629,934 B2Healthetech, Inc. · 2003
- Stopcock valve329US 5,755,683 ADEKA Products Limited Partnership · 1998
- Microfabricated reactor293US 5,674,742 AThe Regents of the University of California · 1997