F04D 29/2277
For increasing npsh or dealing with liquids near boiling-point
Official title: {for increasing NPSH or dealing with liquids near boiling-point}
F04D29/2277 (For increasing npsh or dealing with liquids near boiling-point) appears on 144 US grants and 83 published applications in this corpus.
Search patents in F04D- Granted patents
- 144
- Published applications
- 83
- Assignees
- 103
- Inventors
- 288
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 6 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 6 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 7 | 0 |
| 2001 | 3 | 1 |
| 2002 | 4 | 0 |
| 2003 | 4 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 2 |
| 2006 | 2 | 4 |
| 2007 | 1 | 2 |
| 2008 | 5 | 5 |
| 2009 | 0 | 2 |
| 2010 | 4 | 3 |
| 2011 | 1 | 4 |
| 2012 | 1 | 1 |
| 2013 | 2 | 5 |
| 2014 | 0 | 2 |
| 2015 | 5 | 5 |
| 2016 | 0 | 7 |
| 2017 | 5 | 6 |
| 2018 | 7 | 3 |
| 2019 | 3 | 5 |
| 2020 | 2 | 4 |
| 2021 | 4 | 3 |
| 2022 | 3 | 2 |
| 2023 | 2 | 7 |
| 2024 | 7 | 3 |
| 2025 | 5 | 4 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydrodynamic cavitation system for the removal of unwanted, toxic, or contaminated organic and inorganic compounds25 Aug 2026US 12,715,788 B28215 Technology, Inc.
- Method for controlling of a pump unit and a pump unit for pumping liquid or suspension5 May 2026US 12,618,413 B2Sulzer Management AG
- Modular cryogenic permanent magnet electrical motors and generators for submerged motor pumps and turbines and related systems and methods25 Nov 2025US 12,480,497 B2Flowserve US Company
- Multi-phase rotor, system and method for maintaining a stable vapour cavity26 Aug 2025US 12,398,725 B2Cre 8 Technologies Limited
- Compressor for CO2 cycle with at least two cascade compression stages for assuring supercritical conditions24 Jun 2025US 12,338,827 B2Nuovo Pignone Tecnologie Srl
- Modular cryogenic permanent magnet electrical motors and generatorsfor submerged motor pumps and turbines and related systems and methods19 Mar 2026US 2026/0078760 A1Flowserve US Company
- Method for controlling of a pump unit and a pump unit for pumping liquid or suspension20 Nov 2025US 2025/0354557 A1Sulzer Management AG
- Method for controlling of a pump unit and a pump unit for pumping liquid or suspension20 Nov 2025US 2025/0354561 A1Sulzer Management AG
- Hydrodynamic cavitation system for the removal of unwanted, toxic, or contaminated organic and inorganic compounds19 Jun 2025US 2025/0197254 A18215 Technology, Inc.
- A Multi-Phase Rotor, System and Method for Maintaining a Stable Vapour Cavity16 Jan 2025US 2025/0020136 A1Cre 8 Technologies Limited
Most cited
By later US patents
- Roto-dynamic pump with a backflow recirculator149US 4,375,937 AIngersoll-Rand Company · 1983
- Centrifugal blood pump with impeller blades forming a spin inducer148US 5,458,459 AHaemonetics Corporation · 1995
- Blood pump143US 5,501,574 ABaxter International Inc. · 1996
- Impeller for centrifugal pumps126US 5,192,193 AIngersoll-Dresser Pump Company · 1993
- Combined boiler feed and condensate pump124US 5,215,448 AIngersoll-Dresser Pump Company · 1993