F04D 19/028
Layout of fluid flow through the stages
Official title: {Layout of fluid flow through the stages}
F04D19/028 (Layout of fluid flow through the stages) appears on 42 US grants and 46 published applications in this corpus.
Search patents in F04D- Granted patents
- 42
- Published applications
- 46
- Assignees
- 35
- Inventors
- 103
- Latest grant
- 4 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 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 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 3 |
| 2014 | 1 | 1 |
| 2015 | 1 | 5 |
| 2016 | 1 | 4 |
| 2017 | 2 | 4 |
| 2018 | 2 | 4 |
| 2019 | 4 | 0 |
| 2020 | 4 | 6 |
| 2021 | 2 | 2 |
| 2022 | 7 | 2 |
| 2023 | 2 | 5 |
| 2024 | 5 | 2 |
| 2025 | 1 | 2 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Blower4 Feb 2025US 12,215,716 B2Milwaukee Electric Tool Corporation
- Compressor for an engine22 Oct 2024US 12,123,419 B2MTU Aero Engines AG
- Aeronautic propulsion system with improved propulsion efficiency8 Oct 2024US 12,110,845 B2Safran Aircraft Engines
- Aeronautic propulsion system with improved propulsion efficiency3 Sep 2024US 12,078,126 B2Safran Aircraft Engines
- Efficient gas turbine engine installation and operation11 Jun 2024US 12,006,835 B2ROLLS-ROYCE plc
- Blading system for axial compressors with axially opposing base merged double triangular prism device blades6 Aug 2026US 2026/0226914 A1Spacerolls Aerospace Technologies Private Limited
- Turbomachine having a flow duct9 Jul 2026US 2026/0193989 A1
- Efficient gas turbine engine installation and operation25 Dec 2025US 2025/0389191 A1ROLLS-ROYCE plc
- Blower5 Jun 2025US 2025/0180040 A1Milwaukee Electric Tool Corporation
- Blower3 Oct 2024US 2024/0328434 A1Milwaukee Electric Tool Corporation
Most cited
By later US patents
- Turboprop booster45US 5,345,760 AGeneral Electric Company · 1994
- Multistage pumps and compressors26US 5,755,554 AWeir Pumps Limited · 1998
- Compression section for an axial flow rotary machine18US 4,371,311 AUnited Technologies Corporation · 1983
- Multistage axial flow pumps and compressors18US 5,562,405 AWeir Pumps Limited · 1996
- Multi-stage axial flow compressor15US 3,937,592 AGutehoffnungshutte Sterkrade Aktiengesellschaft · 1976