G01F 1/37
The pressure or differential pressure being measured by means of communicating tubes
Official title: the pressure or differential pressure being measured by means of communicating tubes or reservoirs with movable fluid levels, e.g. by U-tubes
G01F1/37 (The pressure or differential pressure being measured by means of communicating tubes) appears on 39 US grants and 42 published applications in this corpus.
Search patents in G01F- Granted patents
- 39
- Published applications
- 42
- Assignees
- 35
- Inventors
- 122
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 3 | 1 |
| 2004 | 1 | 2 |
| 2005 | 0 | 3 |
| 2006 | 1 | 2 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 2 |
| 2014 | 2 | 2 |
| 2015 | 1 | 3 |
| 2016 | 2 | 0 |
| 2017 | 0 | 1 |
| 2018 | 3 | 2 |
| 2019 | 2 | 3 |
| 2020 | 2 | 1 |
| 2021 | 2 | 2 |
| 2022 | 2 | 5 |
| 2023 | 4 | 4 |
| 2024 | 3 | 3 |
| 2025 | 2 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Negative pressure wave monitoring based leak detection method of multipath pipeline network29 Jul 2025US 12,372,428 B2Tianjin Jyjc Technology Co., Ltd.
- Measuring flow rates of multiphase fluids10 Jun 2025US 12,326,353 B2Saudi Arabian Oil Company
- Multiphase fluid flow characterization10 Dec 2024US 12,163,816 B2Saudi Arabian Oil Company
- Pump having a pressure sensor to displace a known volume of fluid from a reservoir, which stretches and contracts12 Nov 2024US 12,140,127 B2Fize Medical Ltd.
- Methods and apparatus for pressure based mass flow ratio control26 Mar 2024US 11,940,307 B2MKS Instruments, Inc.
- Device and method for measuring fluid flow and pressure under hyper-gravity environment21 May 2026US 2026/0139978 A1Zhejiang University
- Gas flow rate measurement for redox flow battery systems and other closed systems and methods of making and using15 Jan 2026US 2026/0018637 A1Cougar Creek Technologies, LLC
- Variably choked pressure rate-of-rise mass flow verifier23 Oct 2025US 2025/0327695 A1APPLIED Materials.Inc.
- Pump-Based Fluid Flow Meter12 Dec 2024US 2024/0410348 A1Fize Medical Ltd.
- Measuring flow rates of multiphase fluids25 Jan 2024US 2024/0027242 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Multiple-function fluid measuring and transmitting apparatus137US 5,469,749 AHitachi, Ltd. · 1995
- Flow sensor devices and systems33US 9,996,089 B2Blue-White Industries, Ltd. · 2018
- Flow sensor devices and systems31US 10,948,320 B2Blue-White Industries, Ltd. · 2021
- Flow sensor devices and systems27US 11,402,248 B2Blue-White Industries, Ltd. · 2022
- Flow indicator for positive displacement pump26US 4,257,748 AVenus Products, Inc. · 1981