F04D 29/2238
Special flow patterns
Official title: {Special flow patterns (F04D11/005 takes precedence)}
F04D29/2238 (Special flow patterns) appears on 178 US grants and 155 published applications in this corpus.
Search patents in F04D- Granted patents
- 178
- Published applications
- 155
- Assignees
- 120
- Inventors
- 330
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 2 |
| 2002 | 7 | 2 |
| 2003 | 3 | 2 |
| 2004 | 2 | 5 |
| 2005 | 4 | 2 |
| 2006 | 3 | 5 |
| 2007 | 0 | 1 |
| 2008 | 4 | 3 |
| 2009 | 1 | 8 |
| 2010 | 1 | 7 |
| 2011 | 4 | 5 |
| 2012 | 6 | 4 |
| 2013 | 5 | 4 |
| 2014 | 1 | 6 |
| 2015 | 4 | 7 |
| 2016 | 3 | 10 |
| 2017 | 7 | 6 |
| 2018 | 7 | 11 |
| 2019 | 5 | 14 |
| 2020 | 8 | 7 |
| 2021 | 9 | 11 |
| 2022 | 10 | 6 |
| 2023 | 8 | 8 |
| 2024 | 5 | 6 |
| 2025 | 8 | 7 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method of designing single-channel pump and single-channel pump25 Aug 2026US 12,716,425 B2Korea Institute of Industrial Technology
- Impeller pump and method26 May 2026US 12,638,021 B2Pentair Flow Technologies, LLC
- Impeller pump apparatus for pumping shear sensitive fluids10 Mar 2026US 12,571,396 B2
- Electrical submersible pump with single direction lubricant flow25 Nov 2025US 12,480,498 B2Baker Hughes Oilfield Operations LLC
- Centrifugal pump system14 Oct 2025US 12,439,899 B2
- Flow Reversing Pump Apparatus23 Jul 2026US 2026/0210323 A1
- Pump9 Jul 2026US 2026/0194065 A1Ebara Corporation
- Multistage disc pump for multiphase fluids25 Jun 2026US 2026/0177067 A1Mxq, LLC
- Centrifugal pump impeller with inverted expulsion chambers9 Apr 2026US 2026/0098543 A1Crane Pumps & Systems PFT Corp.
- Water Pump26 Mar 2026US 2026/0085693 A1Coavis
Most cited
By later US patents
- Stabilizing drive for contactless rotary blood pump impeller214US 7,976,271 B2HeartWare, Inc. · 2011
- Pump system for high pressure application176US 9,829,002 B2Tucson Embedded Systems, Inc. · 2017
- Shrouded thrust bearings168US 7,997,854 B2HeartWare, Inc. · 2011
- Medical fluid pump167US 5,578,012 ADEKA Products Limited Partnership · 1996
- Pump system for high pressure application164US 10,465,689 B2Tucson Embedded Systems, Inc. · 2019