F04D 21/00
Pump involving supersonic speed of pumped fluids
F04D21/00 (Pump involving supersonic speed of pumped fluids) appears on 94 US grants and 91 published applications in this corpus.
Search patents in F04D- Granted patents
- 94
- Published applications
- 91
- Assignees
- 58
- Inventors
- 191
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 1 |
| 2004 | 0 | 5 |
| 2005 | 0 | 4 |
| 2006 | 4 | 4 |
| 2007 | 1 | 2 |
| 2008 | 3 | 4 |
| 2009 | 3 | 1 |
| 2010 | 1 | 6 |
| 2011 | 2 | 2 |
| 2012 | 6 | 10 |
| 2013 | 3 | 10 |
| 2014 | 6 | 3 |
| 2015 | 7 | 4 |
| 2016 | 3 | 4 |
| 2017 | 4 | 4 |
| 2018 | 2 | 1 |
| 2019 | 2 | 1 |
| 2020 | 2 | 5 |
| 2021 | 2 | 4 |
| 2022 | 2 | 3 |
| 2023 | 3 | 3 |
| 2024 | 4 | 3 |
| 2025 | 5 | 2 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Variable geometry supersonic compressor24 Jun 2025US 12,338,829 B2Next Gen Compression LLC
- Rotary device for inputting thermal energy into fluids25 Mar 2025US 12,258,977 B2Coolbrook Oy
- Blading system for axial compressors with axially opposing base merged double triangular prism device blades6 Aug 2026US 2026/0226914 A1Spacerolls Aerospace Technologies Private Limited
- Stator part with blade and fin arrangement in a turbomachine23 Jul 2026US 2026/0210253 A1Safran
- Supersonic diffuser for turbomachinery arranged to impart thermal energy to a process fluid29 Jan 2026US 2026/0027543 A1Siemens Energy Global GmbH & Co. KG
- Tandem stator24 Jul 2025US 2025/0237148 A1Safran Aero Boosters SA
- Variable geometry supersonic compressor6 Feb 2025US 2025/0043789 A1Next Gen Compression LLC
Most cited
By later US patents
- Swept turbomachinery blade99US 5,642,985 AUnited Technologies Corporation · 1997
- Rotary turbomachine having a transonic compressor stage98US 6,017,186 AMTU Motoren- und Turbinen-Union Muenchen GmbH · 2000
- Fan blade48US 7,997,872 B2ROLLS-ROYCE plc · 2011
- Supersonic compressors46US 3,993,414 AOffice National d'Etudes et de Recherches Aerospatiales (O.N.E.R.A.) · 1976
- Tone noise reduction in turbomachines45US 8,177,496 B2ROLLS-ROYCE plc · 2012