F01N 2470/24
Concentric tubes or tubes being concentric to housing
Official title: Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
F01N2470/24 (Concentric tubes or tubes being concentric to housing) appears on 402 US grants and 359 published applications in this corpus.
Search patents in F01N- Granted patents
- 402
- Published applications
- 359
- Assignees
- 225
- Inventors
- 913
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 8 | 0 |
| 2000 | 7 | 0 |
| 2001 | 8 | 1 |
| 2002 | 3 | 3 |
| 2003 | 0 | 3 |
| 2004 | 5 | 2 |
| 2005 | 5 | 6 |
| 2006 | 2 | 9 |
| 2007 | 1 | 13 |
| 2008 | 7 | 9 |
| 2009 | 7 | 12 |
| 2010 | 3 | 5 |
| 2011 | 8 | 8 |
| 2012 | 6 | 14 |
| 2013 | 14 | 23 |
| 2014 | 16 | 24 |
| 2015 | 18 | 14 |
| 2016 | 19 | 20 |
| 2017 | 11 | 16 |
| 2018 | 19 | 23 |
| 2019 | 20 | 29 |
| 2020 | 20 | 35 |
| 2021 | 25 | 28 |
| 2022 | 39 | 18 |
| 2023 | 17 | 17 |
| 2024 | 15 | 18 |
| 2025 | 15 | 7 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Muffler for internal combustion engines25 Aug 2026US 12,716,373 B2Plaggio & C. S.P.A.
- Muffler and method for making a muffler9 Dec 2025US 12,492,653 B2Purem GmbH
- Sound absorbing element with low profile micro-louver slits and muffler assembly using the same9 Dec 2025US 12,492,654 B2ACS Industries, Inc.
- Dosing and mixing assemblies for exhaust aftertreatment system18 Nov 2025US 12,473,851 B2Donaldson Company, Inc.
- Exhaust gas routing component for an exhaust gas system of an internal combustion engine14 Oct 2025US 12,442,325 B2Purem GmbH
- Mixing path for an exhaust gas system of an internal combustion engine4 Jun 2026US 2026/0153043 A1Purem GmbH
- Mixing section for an exhaust system of an internal combustion engine2 Apr 2026US 2026/0092549 A1Purem GmbH
- Exhaust assembly heat mitigation system14 Aug 2025US 2025/0257680 A1Caterpillar Inc.
- Fuel cell exhaust gas system7 Aug 2025US 2025/0253359 A1Purem GmbH
- Dual leg aftertreatment system19 Jun 2025US 2025/0198322 A1Cummins Power Generation Inc.
Most cited
By later US patents
- Connecting structure for exhaust pipes269US 6,406,066 B1Honda Giken Kogyo Kabushiki Kaisha · 2002
- Method and apparatus for reducing nitrogen oxides from internal combustion engine207US 5,272,871 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1993
- Mobile power generation system151US 11,125,156 B2Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. · 2021
- Exhaust aftertreatment device, including chemical mixing and acoustic effects87US 6,722,123 B2Fleetguard, Inc. · 2004
- Silencer83US 6,312,650 B1Silentor Holding A/S · 2001