B64C 2230/24
Boundary layer controls: by using passive resonance cavities
Official title: by using passive resonance cavities, e.g. without transducers
B64C2230/24 (Boundary layer controls: by using passive resonance cavities) appears on 23 US grants and 18 published applications in this corpus.
Search patents in B64C- Granted patents
- 23
- Published applications
- 18
- Assignees
- 23
- Inventors
- 54
- Latest grant
- 23 Jul 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 2 | 1 |
| 2008 | 0 | 3 |
| 2009 | 0 | 1 |
| 2010 | 2 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 3 | 0 |
| 2015 | 1 | 1 |
| 2016 | 3 | 2 |
| 2017 | 2 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 2 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 2 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Micro-cavity actuator for delay of dynamic stall23 Jul 2024US 12,043,372 B1The United States of America as represented by the Secretary of the Air Force
- Removable passive airflow oscillation device and system28 May 2024US 11,994,156 B2Textron Innovations Inc.
- Removable passive airflow oscillation device and system14 Mar 2023US 11,603,186 B2Textron Innovations Inc.
- Wave-shaped acoustic insert and core17 Nov 2020US 10,836,502 B2The Boeing Company
- Sound absorbers for airframe components10 Dec 2019US 10,501,165 B2Bombardier Inc.
- Open Rotor Propulsion System with Acoustic Treatment16 Jul 2026US 2026/0200586 A1Rtx Corporation
- Removable passive airflow oscillation device and system15 Jun 2023US 2023/0182890 A1Textron Innovations Inc.
- Removable passive airflow oscillation device and system16 Jul 2020US 2020/0223534 A1Bell Helicopter Textron Inc.
- Device For Reducing Or Even Eliminating Tonal Noise For An Aircraft Powerplant De-Icing System2 Apr 2020US 2020/0102085 A1Airbus Operations GmbH
- Wave-Shaped Acoustic Insert and Core20 Jun 2019US 2019/0185171 A1The Boeing Company
Most cited
By later US patents
- Passively driven acoustic jet controlling boundary layers68US 6,379,110 B1United Technologies Corporation · 2002
- Apparatus for active fluid control27US 5,983,944 A1999
- Flap side edge liners for airframe noise reduction17US 8,695,915 B1The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 2014
- Flap edge noise reduction fins11US 9,132,909 B1The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 2015
- High performance synthetic valve/pulsator10US 7,748,664 B2Lockheed Martin Corporation · 2010