F01N 13/02
Exhaust or silencing apparatus characterised by constructional features: having two or more
Official title: having two or more separate silencers in series
F01N13/02 (Exhaust or silencing apparatus characterised by constructional features: having two or more) appears on 196 US grants and 213 published applications in this corpus.
Search patents in F01N- Granted patents
- 196
- Published applications
- 213
- Assignees
- 107
- Inventors
- 523
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 7 |
| 2002 | 5 | 3 |
| 2003 | 8 | 5 |
| 2004 | 5 | 14 |
| 2005 | 5 | 8 |
| 2006 | 11 | 7 |
| 2007 | 3 | 10 |
| 2008 | 3 | 11 |
| 2009 | 10 | 5 |
| 2010 | 4 | 14 |
| 2011 | 5 | 15 |
| 2012 | 6 | 19 |
| 2013 | 9 | 21 |
| 2014 | 33 | 14 |
| 2015 | 13 | 12 |
| 2016 | 14 | 6 |
| 2017 | 6 | 13 |
| 2018 | 7 | 7 |
| 2019 | 11 | 8 |
| 2020 | 6 | 4 |
| 2021 | 5 | 5 |
| 2022 | 4 | 2 |
| 2023 | 2 | 0 |
| 2024 | 0 | 1 |
| 2025 | 2 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Exhaust gas rectifier and exhaust gas purification system1 Sep 2026US 12,723,530 B2Yanmar Holdings Co., Ltd.
- Active hydrocarbon trap for reduction of emissions from internal combustion engines using a four valve configuration25 Nov 2025US 12,480,433 B2Saudi Arabian Oil Company
- Exhaust gas cleaning system and method for cleaning exhaust gas and use of exhaust gas cleaning system25 Feb 2025US 12,234,756 B2Alfa Laval Corporate AB
- Two-passage exhaust system for an engine15 Aug 2023US 11,725,573 B2Polaris Industries Inc.
- Side vehicle body structure of vehicle10 Jan 2023US 11,548,565 B2Mazda Motor Corporation
- Active hydrocarbon trap for reduction of emissions from internal combustion engines using a four valve configuration26 Jun 2025US 2025/0207522 A1Aramco Services Company
- Close-coupled scr system30 Jan 2025US 2025/0032984 A1Johnson Matthey Public Limited Company
- Exhaust Gas Rectifier And Exhaust Gas Purification System18 Jan 2024US 2024/0018888 A1Yanmar Holdings Co., Ltd.
- Exhaust gas cleaning system and method for cleaning exhaust gas and use of exhaust gas cleaning system17 Nov 2022US 2022/0364487 A1Alfa Laval Corporate AB
- Exhaust pipe16 Jun 2022US 2022/0186642 A1Futaba Industrial Co., Ltd.
Most cited
By later US patents
- Exhaust muffler174US 4,880,078 AHonda Giken Kogyo Kabushiki Kaisha · 1989
- Cooling system for snowmobile engine76US 5,957,230 AYamaha Hatsudoki Kabushiki Kaisha · 1999
- Method and system for regenerating NOx adsorbers and/or particulate filters68US 6,832,473 B2Delphi Technologies, Inc. · 2004
- Method and system for a turbocharged engine61US 8,701,409 B2Ford Global Technologies, LLC · 2014
- Exhaust system for internal combustion engines51US 5,388,408 ALawrence-Keech Inc. · 1995