F01N 13/087
Having valves upstream of silencing apparatus for by-passing at least part of
Official title: {having valves upstream of silencing apparatus for by-passing at least part of exhaust directly to atmosphere (valves for changing flow path through the silencer F01N1/166)}
F01N13/087 (Having valves upstream of silencing apparatus for by-passing at least part of) appears on 106 US grants and 93 published applications in this corpus.
Search patents in F01N- Granted patents
- 106
- Published applications
- 93
- Assignees
- 75
- Inventors
- 282
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 4 |
| 2004 | 1 | 1 |
| 2005 | 1 | 3 |
| 2006 | 1 | 1 |
| 2007 | 2 | 1 |
| 2008 | 2 | 2 |
| 2009 | 0 | 1 |
| 2010 | 3 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 2 |
| 2013 | 1 | 1 |
| 2014 | 1 | 4 |
| 2015 | 5 | 7 |
| 2016 | 3 | 5 |
| 2017 | 4 | 6 |
| 2018 | 2 | 6 |
| 2019 | 10 | 8 |
| 2020 | 3 | 8 |
| 2021 | 12 | 10 |
| 2022 | 4 | 7 |
| 2023 | 12 | 7 |
| 2024 | 5 | 2 |
| 2025 | 6 | 2 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for controlling a cold light off catalyst8 Sep 2026US 12,729,639 B2Fca US LLC
- Locomotive exhaust aftertreatment system28 Jul 2026US 12,692,808 B1Echeneidae Inc.
- Exhaust system and method of operating the same21 Jul 2026US 12,687,125 B1Saudi Arabian Oil Company
- Variable exhaust control system11 Nov 2025US 12,467,399 B2
- Work vehicle and aftertreatment system therefor7 Oct 2025US 12,435,654 B1Deere & Company
- System and method for controlling a cold light off catalyst3 Sep 2026US 2026/0258742 A1Fca US LLC
- Switchable exhaust system13 Aug 2026US 2026/0235066 A1Keijtech
- Exhaust units for road vehicles25 Dec 2025US 2025/0389217 A1Ferrari S.P. A.
- Systems, devices, and methods for regenerating a particulate filter17 Jul 2025US 2025/0230761 A1Jtsmcdp, LLC
- Exhaust gas control valve4 Jul 2024US 2024/0218820 A1BorgWarner Inc.
Most cited
By later US patents
- Exhaust system for small planing boat45US 5,234,364 ASanshin Kogyo Kabushiki Kaisha · 1993
- Exhaust control assembly for marine stern drive41US 4,773,215 ABrunswick Corporation · 1988
- Three-way valve and exhaust gas purifier using the same32US 5,908,047 ASumitomo Electric Industries, Ltd. · 1999
- Muffler controller for use in controllable exhaust system of internal combustion engine26US 5,744,762 ACalsonic Corporation · 1998
- Air exhaust by-pass for underwater exhaust systems25US 4,601,666 A1986