F04D 29/2272
For influencing flow or boundary layer
Official title: {for influencing flow or boundary layer}
F04D29/2272 (For influencing flow or boundary layer) appears on 21 US grants and 23 published applications in this corpus.
Search patents in F04D- Granted patents
- 21
- Published applications
- 23
- Assignees
- 24
- Inventors
- 49
- Latest grant
- 8 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 0 | 1 |
| 2016 | 1 | 2 |
| 2017 | 0 | 3 |
| 2018 | 2 | 2 |
| 2019 | 1 | 3 |
| 2020 | 2 | 2 |
| 2021 | 2 | 1 |
| 2022 | 2 | 1 |
| 2023 | 1 | 1 |
| 2024 | 2 | 2 |
| 2025 | 2 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Centrifugal slurry pump impeller shroud with lip8 Jul 2025US 12,352,281 B2Weir Minerals Australia Ltd.
- Two-stage cavitation generator for organic wastewater treatment18 Feb 2025US 12,228,139 B2Jiangsu University
- Inducer for a submersible pump for pumping a slurry containing solids and viscous fluids and method of designing same24 Sep 2024US 12,098,728 B2Dajustco IP Holdings Inc.
- Blood pump28 May 2024US 11,992,670 B2Resuscitec GmbH
- Particle guard ring for mixed flow pump4 Jul 2023US 11,692,551 B2Schlumberger Technology Corporation
- Centrifugal pump impeller with inverted expulsion chambers9 Apr 2026US 2026/0098543 A1Crane Pumps & Systems PFT Corp.
- Centrifugal Slurry Pump Impeller Shroud With Lip1 Aug 2024US 2024/0254999 A1Weir Minerals Australia Ltd.
- Two-stage cavitation generator for organic wastewater treatment4 Jul 2024US 2024/0218883 A1Jiangsu University
- Blood pump13 Jul 2023US 2023/0218885 A1Resuscitec GmbH
- Inducer for a submersible pump for pumping a slurry containing solids and viscous fluids and method of designing same10 Nov 2022US 2022/0356885 A1Dajustco IP Holdings Inc.
Most cited
By later US patents
- Rotor with logarithmic scaled shape40US 5,934,877 A1999
- Deflector means for centrifugal pumps31US 5,156,522 AExxon Production Research Company · 1992
- Variable geometry centrifugal pump21US 4,417,849 AThe United States of America as represented by the Secretary of the Navy · 1983
- Centrifugal pump with adaptive pump stages15US 11,268,520 B2Saudi Arabian Oil Company · 2022
- Centrifugal pump with adaptive pump stages10US 10,533,558 B2Saudi Arabian Oil Company · 2020