F04B 23/04
Combinations of two or more pumps
F04B23/04 (Combinations of two or more pumps) appears on 1,402 US grants and 1,511 published applications in this corpus.
Search patents in F04B- Granted patents
- 1,402
- Published applications
- 1,511
- Assignees
- 738
- Inventors
- 2,639
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 6 | 0 |
| 1985 | 13 | 0 |
| 1986 | 5 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 7 | 0 |
| 1996 | 13 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 8 | 0 |
| 2000 | 13 | 0 |
| 2001 | 12 | 3 |
| 2002 | 15 | 14 |
| 2003 | 15 | 25 |
| 2004 | 26 | 26 |
| 2005 | 14 | 24 |
| 2006 | 15 | 16 |
| 2007 | 21 | 23 |
| 2008 | 24 | 21 |
| 2009 | 12 | 28 |
| 2010 | 21 | 35 |
| 2011 | 18 | 26 |
| 2012 | 25 | 42 |
| 2013 | 25 | 47 |
| 2014 | 30 | 70 |
| 2015 | 41 | 62 |
| 2016 | 57 | 68 |
| 2017 | 54 | 91 |
| 2018 | 61 | 88 |
| 2019 | 78 | 93 |
| 2020 | 97 | 103 |
| 2021 | 101 | 124 |
| 2022 | 102 | 121 |
| 2023 | 112 | 127 |
| 2024 | 121 | 104 |
| 2025 | 107 | 74 |
| 2026 | 56 | 56 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Long stroke parallel pump6 Oct 2026US 12,753,746 B2National Oilwell Varco, L. P.
- Apparatus for delivering metered fluid at elevated pressure22 Sep 2026US 12,742,443 B1Prince Sattam Bin Abdulaziz University
- Fluid end block and fluid end for a multiplex piston pump having multiple inlet passages15 Sep 2026US 12,736,035 B2
- Closing unit system for a blowout preventer8 Sep 2026US 12,729,597 B2Schlumberger Technology Corporation
- Through-hardened valve seat for hydraulic fracturing1 Sep 2026US 12,723,662 B2Apex Industrial LLC
- High pressure gas compresor environmental recovery system8 Oct 2026US 2026/0309137 A1Flowco MasterCo LLC
- Set point control for fixed speed engine driven fracking pumps1 Oct 2026US 2026/0298062 A1Halliburton Energy Services.Inc.
- Methods and systems for operating a fleet of pumps1 Oct 2026US 2026/0298063 A1BJ Energy Solutions, LLC
- Active checked multiple displacer assembly1 Oct 2026US 2026/0298217 A1Graco Minnesota Inc.
- Long stroke parallel pump1 Oct 2026US 2026/0298218 A1National Oilwell Varco, L. P.
Most cited
By later US patents
- Mobile, modular, electrically powered system for use in fracturing underground formations358US 9,103,193 B2Evolution Well Services, LLC · 2015
- Mobile, modular, electrically powered system for use in fracturing underground formations334US 9,366,114 B2Evolution Well Services, LLC · 2016
- Quintuplex mud pump319US 8,083,504 B2Weatherford/Lamb, Inc. · 2011
- Cold weather package for oil field hydraulics309US 9,611,728 B2U.S. Well Services, LLC · 2017
- Systems and methods for routing pressurized fluid305US 8,905,056 B2Halliburton Energy Services.Inc. · 2014