G01L 7/18
Measuring the steady or quasi-steady pressure of a fluid or a fluent
Official title: using liquid as the pressure-sensitive medium, e.g. liquid-column gauges
G01L7/18 (Measuring the steady or quasi-steady pressure of a fluid or a fluent) appears on 83 US grants and 67 published applications in this corpus.
Search patents in G01L- Granted patents
- 83
- Published applications
- 67
- Assignees
- 72
- Inventors
- 192
- Latest grant
- 3 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 3 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 1 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 2 |
| 2012 | 0 | 2 |
| 2013 | 1 | 5 |
| 2014 | 3 | 1 |
| 2015 | 4 | 6 |
| 2016 | 4 | 3 |
| 2017 | 1 | 3 |
| 2018 | 4 | 5 |
| 2019 | 1 | 5 |
| 2020 | 3 | 7 |
| 2021 | 4 | 4 |
| 2022 | 7 | 6 |
| 2023 | 5 | 6 |
| 2024 | 5 | 3 |
| 2025 | 1 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
- G01L 7/182Constructional details31
- G01L 7/187With optical transmitting or indicating means15
- G01L 7/20Involving a closed chamber above the liquid level, the chamber being exhausted9
- G01L 7/185With mechanical transmitting or indicating means4
- G01L 7/22Involving floats4
- G01L 7/24Involving balances in the form of rings partly filled with liquid0
Recent patents
- Apparatus for measurement of capillary pressure in a porous sample3 Jun 2025US 12,320,723 B2Ametek, Inc.
- Annular fluidic system with compass function22 Oct 2024US 12,124,222 B2The Swatch Group Research and Development Ltd
- Method and system for diagnosing fuel tank pressure sensor4 Jun 2024US 12,000,744 B2Ford Global Technologies, LLC
- Capillary-based pressure threshold sensor for liquids and methods and apparatuses using same7 May 2024US 11,977,004 B2Becton, Dickinson and Company
- System and method for detecting watertightness in the annular space of flexible lines26 Mar 2024US 11,940,352 B2Petroleo Brasileiro S.A. - Petrobras
- Microelectromechanical sensor with external fluidic coupling having contamination-reducing structure12 Jun 2025US 2025/0189392 A1STMicroelectronics International N. V.
- Pressure detection module and pressure sensor6 Mar 2025US 2025/0076138 A1Measurement Specialties (China) Ltd.
- Apparatus for measurement of capillary pressure in a porous sample3 Oct 2024US 2024/0328880 A1Ametek, Inc.
- Capillary-based pressure threshold sensor for liquids and methods and apparatuses using same26 Sep 2024US 2024/0319034 A1Becton, Dickinson and Company
- Blood-pressure gauge and method for measuring blood pressure13 Jun 2024US 2024/0192069 A1Omron Healthcare Co., Ltd.
Most cited
By later US patents
- Differential fiber optic differential pressure sensor114US 4,210,029 ALad Research Industries, Inc. · 1980
- Differential fiber optic proximity sensor37US 4,358,960 ALadd Research Industries, Inc. · 1982
- Flexible hose assembly27US 5,069,253 A1991
- Pressure measuring device27US 6,520,021 B1Fisher & Paykel Limited · 2003
- Measuring absolute static pressure at one or more positions along a microfluidic device23US 6,843,121 B1Eastman Kodak Company · 2005