F04F 1/20
Specially adapted for raising liquids from great depths
Official title: specially adapted for raising liquids from great depths, e.g. in wells
F04F1/20 (Specially adapted for raising liquids from great depths) appears on 57 US grants and 46 published applications in this corpus.
Search patents in F04F- Granted patents
- 57
- Published applications
- 46
- Assignees
- 35
- Inventors
- 97
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 2 |
| 2002 | 1 | 2 |
| 2003 | 2 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 2 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 2 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 3 |
| 2019 | 3 | 1 |
| 2020 | 2 | 7 |
| 2021 | 2 | 6 |
| 2022 | 5 | 6 |
| 2023 | 3 | 5 |
| 2024 | 5 | 0 |
| 2025 | 2 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Gas sparger head for airlift geothermal systems13 Jan 2026US 12,523,130 B2West Virginia University Board of Governors on behalf of West Virginia University
- High-efficiency airlift pump12 Aug 2025US 12,384,706 B2GIS Gas Infusion Systems Inc.
- Pneumatic fluid pump with dual rotational swirling cleaning action5 Aug 2025US 12,378,975 B2Q.E.D. Environmental Systems, Inc.
- Brine dispersal system24 Dec 2024US 12,173,729 B2Natural Ocean Well Co.
- Brine dispersal system24 Dec 2024US 12,173,730 B2Natural Ocean Well Co.
- Gas sparger head for airlift geothermal systems28 May 2026US 2026/0146517 A1West Virginia University Board of Governors on Behaft of West Virginia University
- Brine dispersal system27 Feb 2025US 2025/0067281 A1OceanWell Co.
- Methods and apparati for quickset gas lift separation and liquid storage16 Jan 2025US 2025/0020144 A1Liftrock LLC
- High-efficiency airlift pump28 Dec 2023US 2023/0416125 A1GIS Gas Infusion Systems Inc.
- Submerged reverse osmosis system21 Dec 2023US 2023/0407887 A1Natural Ocean Well Co.
Most cited
By later US patents
- Gas-lift device58US 4,090,814 AInstitutul National Pentru Creatie Stiintifica si Tehnica · 1978
- Coiled tubing sidepocket gas lift mandrel system48US 5,782,261 A1998
- Remotely actuated adjustable choke valve and method for using same41US 5,535,767 AHalliburton Company · 1996
- Intermittent oil well gas-lift apparatus37US 4,708,595 AChevron Research Company · 1987
- Annular safety system for gas lift production37US 5,022,427 AOtis Engineering Corporation · 1991