G01F 25/11
Using a seal ball or piston in a test loop
Official title: {using a seal ball or piston in a test loop}
G01F25/11 (Using a seal ball or piston in a test loop) appears on 111 US grants and 54 published applications in this corpus.
Search patents in G01F- Granted patents
- 111
- Published applications
- 54
- Assignees
- 66
- Inventors
- 162
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 7 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 6 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 3 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 2 |
| 2007 | 0 | 3 |
| 2008 | 3 | 2 |
| 2009 | 1 | 3 |
| 2010 | 1 | 3 |
| 2011 | 0 | 2 |
| 2012 | 3 | 5 |
| 2013 | 3 | 6 |
| 2014 | 5 | 4 |
| 2015 | 2 | 5 |
| 2016 | 4 | 1 |
| 2017 | 3 | 1 |
| 2018 | 1 | 4 |
| 2019 | 3 | 4 |
| 2020 | 4 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 2 |
| 2023 | 2 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Validating performance of a bi-directional prover8 Sep 2026US 12,729,996 B2Saudi Arabian Oil Company
- Technique to identify anomaly amongst base prover volumes using estimated uncertainty25 Jul 2023US 11,709,090 B2Saudi Arabian Oil Company
- Devices to measure flow rates with movable elements10 Jan 2023US 11,547,998 B2Hewlett-Packard Development Company, L. P.
- Method for verifying a flowmeter and device for the implementation thereof7 Dec 2021US 11,193,811 B2"Oil and Gas Measurement Technology" Ltd
- Piston test instrument for calibration and/or gauging of a flow meter and/or for determining a flow rate of a measured medium22 Dec 2020US 10,871,390 B2L'atelier De Matourne, S.A.S
- System and method to evacuate and capture various liquid and gas hydrocarbon fluids from meter provers30 Apr 2026US 2026/0118154 A1Zenrg Services, LLC
- Validating performance of a bi-directional prover7 Aug 2025US 2025/0251272 A1Saudi Arabian Oil Company
- Flow references24 Nov 2022US 2022/0373381 A1TSI Incorporated
- Technique to identify anomaly amongst base prover volumes using estimated uncertainty9 Jun 2022US 2022/0178733 A1Saudi Arabian Oil Company
- Devices to measure flow rates with movable elements17 Sep 2020US 2020/0290041 A1Hewlett-Packard Development Company, L. P.
Most cited
By later US patents
- Respiratory gas analysis instrument having improved volume calibration method and apparatus87US 4,448,058 ASensormedics Corporation · 1984
- Injection pump calibration device52US 5,140,862 A1992
- Automatic meter proving and calibration system46US 4,831,866 ATokheim Corporation · 1989
- Apparatus for determining the characteristic of a flowmeter42US 5,052,211 ACalibron Systems, Inc. · 1991
- Method and apparatus for calibrating a flowmeter using a master meter and a prover35US 5,072,416 ACalibron Systems, Inc. · 1991