F01N 2470/08
Exhaust gas passages being formed between the walls of an outer shell
Official title: Exhaust gas passages being formed between the walls of an outer shell and an inner chamber
F01N2470/08 (Exhaust gas passages being formed between the walls of an outer shell) appears on 133 US grants and 137 published applications in this corpus.
Search patents in F01N- Granted patents
- 133
- Published applications
- 137
- Assignees
- 98
- Inventors
- 290
- Latest grant
- 18 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 1 | 3 |
| 2005 | 1 | 3 |
| 2006 | 1 | 2 |
| 2007 | 2 | 1 |
| 2008 | 1 | 2 |
| 2009 | 3 | 3 |
| 2010 | 3 | 1 |
| 2011 | 1 | 4 |
| 2012 | 2 | 8 |
| 2013 | 2 | 8 |
| 2014 | 11 | 9 |
| 2015 | 9 | 4 |
| 2016 | 7 | 3 |
| 2017 | 1 | 10 |
| 2018 | 6 | 10 |
| 2019 | 9 | 15 |
| 2020 | 9 | 12 |
| 2021 | 12 | 7 |
| 2022 | 15 | 13 |
| 2023 | 13 | 7 |
| 2024 | 3 | 8 |
| 2025 | 6 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Dosing and mixing assemblies for exhaust aftertreatment system18 Nov 2025US 12,473,851 B2Donaldson Company, Inc.
- Sound damper28 Oct 2025US 12,454,901 B2Purem GmbH
- Air-transparent selective sound silencer using ultra-open metamaterial8 Jul 2025US 12,352,190 B2Trustees of Boston University
- Exhaust aftertreatment apparatus8 Jul 2025US 12,352,198 B2Purem Novi, Inc.
- Exhaust structure for engine1 Jul 2025US 12,345,186 B2Kawasaki Motors, Ltd.
- Ultra-compact post-processing system, supercharger assembly and engine27 Mar 2025US 2025/0101898 A1Weichai Power Co., Ltd.
- Emissions Reduction Systems and Methods19 Dec 2024US 2024/0418116 A1
- Exhaust gas system unit14 Nov 2024US 2024/0376840 A1Tenneco Inc.
- Exhaust aftertreatment apparatus31 Oct 2024US 2024/0360779 A1Purem Novi, Inc.
- Improvements in or relating to an outboard propulsion system19 Sep 2024US 2024/0308635 A1Caudwell Marine Limited
Most cited
By later US patents
- High performance automotive muffler38US 4,673,058 AG Enterprises Limited · 1987
- Exhaust muffler with angularly aligned inlets and outlets37US 4,760,894 AAP Industries, Inc. · 1988
- High efficiency mixer for vehicle exhaust system36US 10,287,948 B1Faurecia Emissions Control Technologies, USA, LLC · 2019
- Catalyzer installation for boat engines and method for catalytic exhaust gas cleaning30US 5,167,934 AKST-Motorenversuch GmbH & Co. KG · 1992
- Muffler for an internal combustion engine29US 5,857,327 AKioritz Corporation · 1999