F01N 2490/20
Chambers being formed inside the exhaust pipe without enlargement of the cross
Official title: Chambers being formed inside the exhaust pipe without enlargement of the cross section of the pipe, e.g. resonance chambers
F01N2490/20 (Chambers being formed inside the exhaust pipe without enlargement of the cross) appears on 58 US grants and 18 published applications in this corpus.
Search patents in F01N- Granted patents
- 58
- Published applications
- 18
- Assignees
- 35
- Inventors
- 112
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 2 |
| 2012 | 1 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 1 | 1 |
| 2017 | 0 | 2 |
| 2018 | 2 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 3 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Exhaust handling systems for marine vessels and related methods12 Aug 2025US 12,384,508 B2Marathon Petroleum Company LP
- Exhaust handling systems for marine vessels and related methods23 Jul 2024US 12,043,361 B1Marathon Petroleum Company LP
- Combined exhaust gas silencer7 Dec 2021US 11,193,405 B2
- Exhaust gas aftertreatment device16 Nov 2021US 11,174,775 B2Vitesco Technologies GmbH
- Muffler30 Mar 2021US 10,961,895 B2Futaba Industrial Co., Ltd.
- Exhaust muffler2 Apr 2026US 2026/0092545 A1Tenneco Automotive Operating Company Inc.
- Exhaust handling systems for marine vessels and related methods27 Nov 2025US 2025/0360999 A1Marathon Petroleum Company LP
- Exhaust handling systems for marine vessels and related methods29 Aug 2024US 2024/0286726 A1Marathon Petroleum Company LP
- Exhaust gas aftertreatment device31 Dec 2020US 2020/0408130 A1Vitesco Technologies GmbH
- Combined exhaust gas silencer31 Jan 2019US 2019/0032530 A1
Most cited
By later US patents
- Vertical mount catalytic converter muffler73US 5,808,245 ADonaldson Company, Inc. · 1998
- Muffler with catalytic converter arrangement; and method57US 5,426,269 ADonaldson Company, Inc. · 1995
- Packless silencer55US 4,287,962 AIndustrial Acoustics Company, Inc. · 1981
- Muffler with catalytic converter arrangement; and method53US 5,355,973 ADonaldson Company, Inc. · 1994
- Exhaust silencer arrangement52US 6,158,214 AJ. Eberspächer GmbH & Co. KG · 2000