F04B 23/021
The pump being immersed in the reservoir
Official title: {the pump being immersed in the reservoir}
F04B23/021 (The pump being immersed in the reservoir) appears on 266 US grants and 277 published applications in this corpus.
Search patents in F04B- Granted patents
- 266
- Published applications
- 277
- Assignees
- 192
- Inventors
- 583
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 8 | 0 |
| 2000 | 6 | 0 |
| 2001 | 2 | 2 |
| 2002 | 3 | 0 |
| 2003 | 2 | 5 |
| 2004 | 3 | 6 |
| 2005 | 2 | 5 |
| 2006 | 4 | 2 |
| 2007 | 2 | 3 |
| 2008 | 2 | 3 |
| 2009 | 0 | 2 |
| 2010 | 0 | 5 |
| 2011 | 1 | 5 |
| 2012 | 3 | 9 |
| 2013 | 5 | 12 |
| 2014 | 9 | 15 |
| 2015 | 7 | 16 |
| 2016 | 11 | 15 |
| 2017 | 11 | 11 |
| 2018 | 17 | 20 |
| 2019 | 10 | 34 |
| 2020 | 25 | 18 |
| 2021 | 25 | 17 |
| 2022 | 19 | 15 |
| 2023 | 12 | 23 |
| 2024 | 9 | 16 |
| 2025 | 20 | 11 |
| 2026 | 11 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Transfer pump assembly8 Sep 2026US 12,729,669 B2Graco Minnesota Inc.
- Systems and methods for simulating water intrusion in a structure and testing sump pump performance25 Aug 2026US 12,716,411 B2State Farm Mutual Automobile Insurance Company
- Mobile abrasive slurry delivery apparatus14 Jul 2026US 12,680,322 B1
- Sump pump crock23 Jun 2026US 12,662,293 B2Independence Materials Group, LLC
- Installation for pumping cryogenic fluid and filling station comprising such an installation2 Jun 2026US 12,644,442 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- High Pressure Fuel Pump With Configuration To Mitigate Cavitation9 Jul 2026US 2026/0194033 A1
- Basement sump control systems and methods2 Jul 2026US 2026/0185519 A1DNI Realty, LLC
- Compression system18 Jun 2026US 2026/0168483 A1Universite Du Luxembourg
- Submersible Hydraulic Power Units with Interchangeable Manifolds11 Jun 2026US 2026/0160275 A1
- Pump and drive assembly28 May 2026US 2026/0146593 A1Graco Minnesota Inc.
Most cited
By later US patents
- Suction apparatus78US 4,444,548 AUniversity Testing Service Inc. · 1984
- Pump control system62US 5,856,783 ARaptor, Inc. · 1999
- Wet-dry vacuum apparatus with pump means for discharging liquid therefrom61US 4,080,104 A1978
- Liquid level control systems51US 8,032,256 B1SJE-Rhombus · 2011
- Fluid discharging device50US 4,795,063 APentel Kabushiki Kaisha · 1989