F04D 1/06
Multi-stage pumps
Official title: Multi-stage pumps (F04D1/02, F04D13/10 take precedence)
F04D1/06 (Multi-stage pumps) appears on 562 US grants and 578 published applications in this corpus.
Search patents in F04D- Granted patents
- 562
- Published applications
- 578
- Assignees
- 279
- Inventors
- 1,118
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 3 | 0 |
| 1978 | 9 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 7 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 8 | 0 |
| 1997 | 7 | 0 |
| 1998 | 10 | 0 |
| 1999 | 9 | 0 |
| 2000 | 3 | 0 |
| 2001 | 9 | 3 |
| 2002 | 10 | 2 |
| 2003 | 2 | 5 |
| 2004 | 5 | 9 |
| 2005 | 7 | 11 |
| 2006 | 4 | 11 |
| 2007 | 4 | 14 |
| 2008 | 7 | 10 |
| 2009 | 5 | 7 |
| 2010 | 9 | 13 |
| 2011 | 8 | 10 |
| 2012 | 9 | 9 |
| 2013 | 9 | 12 |
| 2014 | 9 | 9 |
| 2015 | 8 | 38 |
| 2016 | 10 | 22 |
| 2017 | 20 | 52 |
| 2018 | 19 | 41 |
| 2019 | 36 | 45 |
| 2020 | 47 | 45 |
| 2021 | 31 | 50 |
| 2022 | 39 | 30 |
| 2023 | 44 | 27 |
| 2024 | 41 | 38 |
| 2025 | 29 | 35 |
| 2026 | 31 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Multistage disc pump for multiphase fluids6 Oct 2026US 12,753,771 B2
- Multiple blade rows for impeller and diffuser stages15 Sep 2026US 12,736,061 B2
- Split thrust chamber for downhole pump25 Aug 2026US 12,716,417 B2Halliburton Energy Services.Inc.
- Pump system18 Aug 2026US 12,709,404 B2Airbus Operations GmbH
- Centrifugal pump18 Aug 2026US 12,710,048 B2Sulzer Management AG
- Gas separator for electrical submersible pump8 Oct 2026US 2026/0309018 A1Halliburton Energy Services.Inc.
- Systems and methods of prediction and management of scaling on components8 Oct 2026US 2026/0309156 A1Schlumberger Technology Corporation
- Spin-resistant diffuser for electric submersible pump1 Oct 2026US 2026/0298264 A1Halliburton Energy Services.Inc.
- Submersible pump with stage erosion control17 Sep 2026US 2026/0275989 A1Schlumberger Technology Corporation
- Liquid transfer pump30 Jul 2026US 2026/0218708 A1Zhejiang Ele Smart Technology Co., Ltd.
Most cited
By later US patents
- Pump system for high pressure application176US 9,829,002 B2Tucson Embedded Systems, Inc. · 2017
- Pumping facilities and control systems171US 10,711,787 B1W. S. Darley & Co. · 2020
- Pump system for high pressure application164US 10,465,689 B2Tucson Embedded Systems, Inc. · 2019
- Combined boiler feed and condensate pump124US 5,215,448 AIngersoll-Dresser Pump Company · 1993
- Liquid pump123US 5,174,726 A1992