F01N 2490/14
Dead or resonance chambers connected to gas flow tube by relatively short
Official title: Dead or resonance chambers connected to gas flow tube by relatively short side-tubes
F01N2490/14 (Dead or resonance chambers connected to gas flow tube by relatively short) appears on 51 US grants and 27 published applications in this corpus.
Search patents in F01N- Granted patents
- 51
- Published applications
- 27
- Assignees
- 38
- Inventors
- 105
- Latest grant
- 12 Dec 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 2 | 2 |
| 2006 | 2 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 4 |
| 2011 | 0 | 1 |
| 2012 | 3 | 2 |
| 2013 | 4 | 0 |
| 2014 | 2 | 2 |
| 2015 | 1 | 1 |
| 2016 | 0 | 2 |
| 2017 | 4 | 2 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 4 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 4 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Silencer for an exhaust system of an internal combustion engine12 Dec 2023US 11,840,948 B2Purem GmbH
- Exhaust muffler24 Oct 2023US 11,795,847 B2Purem GmbH
- Exhaust muffler for an exhaust system of an internal combustion engine9 May 2023US 11,643,953 B2Purem GmbH
- Vehicle exhaust system2 May 2023US 11,639,676 B2Tenneco Automotive Operating Company Inc.
- Acoustic damper for gas turbine combustors with orthogonal slots27 Dec 2022US 11,536,174 B2President and Fellows of Harvard College
- Damping Device25 Jun 2026US 2026/0177182 A1Hydac Technology GmbH
- Silencer for an exhaust system of an internal combustion engine15 Dec 2022US 2022/0397050 A1Purem GmbH
- Exhaust muffler27 May 2021US 2021/0156287 A1Eberspächer Exhaust Technology GmbH & Co. KG
- Vehicle exhaust system17 Dec 2020US 2020/0392880 A1Tenneco Automotive Operating Company Inc.
- Exhaust muffler for an exhaust system of an internal combustion engine5 Nov 2020US 2020/0347761 A1Eberspächer Exhaust Technology GmbH & Co. KG
Most cited
By later US patents
- Low frequency muffler49US 4,501,341 A1985
- Stamp formed exhaust muffler with conformal outer shell48US 4,909,348 AAP Parts Manufacturing Company · 1990
- Tube and chamber construction for an exhaust muffler47US 4,759,423 AAP Industries, Inc. · 1988
- Stamp formed exhaust muffler with conformal outer shell36US 4,821,840 AAP Parts Manufacturing Company · 1989
- Stamp formed muffler with nonplanar array of tubes35US 4,860,853 AAP Parts Manufacturing Company · 1989