F04D 31/00
Pumping liquids and elastic fluids at the same time
F04D31/00 (Pumping liquids and elastic fluids at the same time) appears on 262 US grants and 243 published applications in this corpus.
Search patents in F04D- Granted patents
- 262
- Published applications
- 243
- Assignees
- 148
- Inventors
- 511
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 7 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 8 | 0 |
| 2001 | 11 | 2 |
| 2002 | 4 | 1 |
| 2003 | 3 | 4 |
| 2004 | 4 | 4 |
| 2005 | 1 | 5 |
| 2006 | 3 | 5 |
| 2007 | 3 | 4 |
| 2008 | 5 | 6 |
| 2009 | 1 | 9 |
| 2010 | 2 | 8 |
| 2011 | 3 | 8 |
| 2012 | 7 | 10 |
| 2013 | 3 | 6 |
| 2014 | 5 | 5 |
| 2015 | 3 | 18 |
| 2016 | 13 | 25 |
| 2017 | 11 | 17 |
| 2018 | 11 | 15 |
| 2019 | 20 | 19 |
| 2020 | 18 | 13 |
| 2021 | 14 | 16 |
| 2022 | 9 | 14 |
| 2023 | 17 | 9 |
| 2024 | 18 | 6 |
| 2025 | 12 | 5 |
| 2026 | 1 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for controlling of a pump unit and a pump unit for pumping liquid or suspension5 May 2026US 12,618,413 B2Sulzer Management AG
- Impeller rotor seal runner with divergent guide surface30 Dec 2025US 12,510,082 B1Pratt & Whitney Canada Corp.
- Submersible well fluid system25 Nov 2025US 12,480,390 B2FMC Technologies, Inc.
- Centrifugal reservoir pump used for processing a hydrogen stream in an aircraft25 Nov 2025US 12,480,495 B2Airbus Operations GmbH
- Fluid vacuum pump11 Nov 2025US 12,467,461 B2Water Technology, LLC
- Liquid retention assemblies for pumping systems3 Sep 2026US 2026/0258818 A1OneSubsea IP UK Limited
- Turbomachine27 Aug 2026US 2026/0251078 A1Kawasaki Jukogyo Kabushiki Kaisha
- Sealing arrangement, pump and method13 Aug 2026US 2026/0235137 A1Aalto University Foundation sr
- Bearing system for hvac&r system6 Aug 2026US 2026/0227102 A1Tyco Fire & Security GmbH
- Fuel system23 Jul 2026US 2026/0210293 A1ROLLS-ROYCE plc
Most cited
By later US patents
- Electrical submersible pump and methods for enhanced utilization of electrical submersible pumps in the completion and production of wellbores267US 6,167,965 ABaker Hughes Incorporated · 2001
- Gas-dispersion device114US 6,123,523 A2000
- Gas-transfer foot77US 9,034,244 B22015
- Gas transfer foot75US 8,361,379 B22013
- Submersible well pump gas separator71US 5,207,810 ABaker Hughes Incorporated · 1993