F04D 7/04
The fluids being viscous or non-homogenous
Official title: the fluids being viscous or non-homogenous
F04D7/04 (The fluids being viscous or non-homogenous) appears on 696 US grants and 566 published applications in this corpus.
Search patents in F04D- Granted patents
- 696
- Published applications
- 566
- Assignees
- 370
- Inventors
- 1,099
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 2 | 0 |
| 1978 | 8 | 0 |
| 1979 | 8 | 0 |
| 1980 | 6 | 0 |
| 1981 | 4 | 0 |
| 1982 | 7 | 0 |
| 1983 | 7 | 0 |
| 1984 | 9 | 0 |
| 1985 | 6 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 9 | 0 |
| 1989 | 11 | 0 |
| 1990 | 12 | 0 |
| 1991 | 11 | 0 |
| 1992 | 15 | 0 |
| 1993 | 13 | 0 |
| 1994 | 11 | 0 |
| 1995 | 11 | 0 |
| 1996 | 7 | 0 |
| 1997 | 10 | 0 |
| 1998 | 9 | 0 |
| 1999 | 7 | 0 |
| 2000 | 15 | 0 |
| 2001 | 10 | 2 |
| 2002 | 12 | 5 |
| 2003 | 7 | 9 |
| 2004 | 9 | 11 |
| 2005 | 8 | 14 |
| 2006 | 11 | 6 |
| 2007 | 9 | 17 |
| 2008 | 11 | 16 |
| 2009 | 4 | 17 |
| 2010 | 9 | 16 |
| 2011 | 11 | 15 |
| 2012 | 18 | 19 |
| 2013 | 13 | 23 |
| 2014 | 11 | 38 |
| 2015 | 19 | 49 |
| 2016 | 23 | 28 |
| 2017 | 35 | 35 |
| 2018 | 23 | 30 |
| 2019 | 37 | 30 |
| 2020 | 27 | 30 |
| 2021 | 24 | 31 |
| 2022 | 32 | 30 |
| 2023 | 28 | 24 |
| 2024 | 39 | 31 |
| 2025 | 32 | 17 |
| 2026 | 14 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sealed micropump8 Sep 2026US 12,728,255 B2Kardion GmbH
- High viscosity pump and rotor for pumping liquids, materials and slurries1 Sep 2026US 12,723,589 B2Eddy Pump Corporation
- Submersible pump with external slicer28 Jul 2026US 12,692,879 B1
- Suction liner and centrifugal pump comprising the same2 Jun 2026US 12,644,470 B2Metso Sweden AB
- Impeller pump and method26 May 2026US 12,638,021 B2Pentair Flow Technologies, LLC
- Submersible Semi-Axial Centrifugal Pump and Impeller for Such Pump27 Aug 2026US 2026/0251149 A1Xylem Europe GmbH
- Combined slurry inducer and crusher20 Aug 2026US 2026/0241388 A1Flowserve Pte. Ltd.
- Impeller of a pump, and pump6 Aug 2026US 2026/0226910 A1Rheinisch-Westfalische Technische Hochschule Aachen, Abgektirzt RWTH Aachen Korperschaft des dffe
- Liquid transfer pump30 Jul 2026US 2026/0218708 A1Zhejiang Ele Smart Technology Co., Ltd.
- Pump system30 Jul 2026US 2026/0218719 A1Pentair Flow Technologies, LLC
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
- Pump system for high pressure application164US 10,465,689 B2Tucson Embedded Systems, Inc. · 2019
- Method of operating variable-speed submersible pump unit153US 6,481,973 B1Little Giant Pump Company · 2002