F04D 29/685
Inducing localised fluid recirculation in the stator-rotor interface
Official title: {Inducing localised fluid recirculation in the stator-rotor interface}
F04D29/685 (Inducing localised fluid recirculation in the stator-rotor interface) appears on 353 US grants and 348 published applications in this corpus.
Search patents in F04D- Granted patents
- 353
- Published applications
- 348
- Assignees
- 138
- Inventors
- 718
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 8 | 1 |
| 2002 | 8 | 13 |
| 2003 | 10 | 9 |
| 2004 | 9 | 2 |
| 2005 | 6 | 10 |
| 2006 | 3 | 4 |
| 2007 | 4 | 10 |
| 2008 | 2 | 11 |
| 2009 | 6 | 11 |
| 2010 | 5 | 16 |
| 2011 | 7 | 12 |
| 2012 | 19 | 18 |
| 2013 | 11 | 10 |
| 2014 | 11 | 11 |
| 2015 | 10 | 25 |
| 2016 | 6 | 25 |
| 2017 | 20 | 21 |
| 2018 | 23 | 17 |
| 2019 | 31 | 29 |
| 2020 | 20 | 25 |
| 2021 | 26 | 12 |
| 2022 | 19 | 9 |
| 2023 | 10 | 15 |
| 2024 | 11 | 12 |
| 2025 | 21 | 10 |
| 2026 | 4 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Rotor case treatment78US 5,308,225 AUnited Technologies Corporation · 1994
- Cast casing treatment for compressor blades77US 5,474,417 AUnited Technologies Corporation · 1995
- Centrifugal compressor75US 4,212,585 ANorthern Research & Engineering Corp. · 1980
- Baffled passage casing treatment for compressor blades74US 5,607,284 AUnited Technologies Corporation · 1997
- Gas turbine engine with improved compressor casing for permitting higher air flow and pressure ratios before surge71US 4,086,022 AROLLS-ROYCE plc · 1978