F04D 9/00
Priming
Official title: Priming; Preventing vapour lock
F04D9/00 (Priming) appears on 504 US grants and 357 published applications in this corpus.
Search patents in F04D- Granted patents
- 504
- Published applications
- 357
- Assignees
- 307
- Inventors
- 978
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 8 | 0 |
| 1978 | 9 | 0 |
| 1979 | 3 | 0 |
| 1980 | 9 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 7 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 9 | 0 |
| 1987 | 6 | 0 |
| 1988 | 10 | 0 |
| 1989 | 15 | 0 |
| 1990 | 8 | 0 |
| 1991 | 15 | 0 |
| 1992 | 15 | 0 |
| 1993 | 11 | 0 |
| 1994 | 10 | 0 |
| 1995 | 10 | 0 |
| 1996 | 12 | 0 |
| 1997 | 7 | 0 |
| 1998 | 8 | 0 |
| 1999 | 3 | 0 |
| 2000 | 13 | 0 |
| 2001 | 8 | 2 |
| 2002 | 6 | 8 |
| 2003 | 7 | 9 |
| 2004 | 8 | 4 |
| 2005 | 3 | 12 |
| 2006 | 7 | 12 |
| 2007 | 8 | 17 |
| 2008 | 4 | 12 |
| 2009 | 5 | 10 |
| 2010 | 10 | 13 |
| 2011 | 6 | 13 |
| 2012 | 13 | 12 |
| 2013 | 13 | 15 |
| 2014 | 13 | 15 |
| 2015 | 12 | 18 |
| 2016 | 7 | 18 |
| 2017 | 18 | 17 |
| 2018 | 12 | 13 |
| 2019 | 13 | 17 |
| 2020 | 13 | 15 |
| 2021 | 15 | 28 |
| 2022 | 22 | 12 |
| 2023 | 21 | 20 |
| 2024 | 20 | 22 |
| 2025 | 14 | 13 |
| 2026 | 9 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Energy irrigation pump truck4 Aug 2026US 12,696,854 B2Zhejiang University of Water Resources and Electric Power
- Magnetic drive, seal-less pump28 Jul 2026US 12,692,872 B2
- Self-priming centrifugal pump assembly with multifunctional sealing system16 Jun 2026US 12,655,846 B2
- Float box with valve12 May 2026US 12,624,697 B2B.B.A. Participaties B.V.
- Air venting12 May 2026US 12,624,704 B2Grundfos Holding A/S
- Viscous, Inertial Pressure, with Energy Recovery pump24 Sep 2026US 2026/0286963 A1
- Electronic solenoid control for a self-priming electric pump6 Aug 2026US 2026/0226890 A1Fluid Handling LLC
- Liquid transfer pump30 Jul 2026US 2026/0218708 A1Zhejiang Ele Smart Technology Co., Ltd.
- Gas separator for electric submersible pump2 Jul 2026US 2026/0185436 A1Halliburton Energy Services.Inc.
- Automatic exhaust mechanism21 May 2026US 2026/0139677 A1Belgravia Wood Limited
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
- Slurry pump apparatus including fluid housing117US 5,114,312 AAtsco, Inc. · 1992
- Liquid-gas separator apparatus109US 4,481,020 ATRW Inc. · 1984
- Liquid petroleum gas submersible electric motor driven pump and drive coupling therefor84US 6,129,529 A2000
- Control algorithm of variable speed pumping system73US 8,019,479 B2Pentair Water Pool and Spa, Inc. · 2011