F01N 13/009
Exhaust or silencing apparatus characterised by constructional features: having two or more
Official title: {having two or more separate purifying devices arranged in series}
F01N13/009 (Exhaust or silencing apparatus characterised by constructional features: having two or more) appears on 4,261 US grants and 4,254 published applications in this corpus.
Search patents in F01N- Granted patents
- 4,261
- Published applications
- 4,254
- Assignees
- 777
- Inventors
- 6,644
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 28 | 0 |
| 1977 | 9 | 0 |
| 1978 | 5 | 0 |
| 1979 | 6 | 0 |
| 1980 | 17 | 0 |
| 1981 | 13 | 0 |
| 1982 | 11 | 0 |
| 1983 | 10 | 0 |
| 1984 | 10 | 0 |
| 1985 | 9 | 0 |
| 1986 | 3 | 0 |
| 1987 | 8 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 13 | 0 |
| 1991 | 23 | 0 |
| 1992 | 35 | 0 |
| 1993 | 32 | 0 |
| 1994 | 38 | 0 |
| 1995 | 66 | 0 |
| 1996 | 47 | 0 |
| 1997 | 49 | 0 |
| 1998 | 79 | 0 |
| 1999 | 67 | 0 |
| 2000 | 59 | 0 |
| 2001 | 97 | 27 |
| 2002 | 94 | 112 |
| 2003 | 98 | 171 |
| 2004 | 121 | 197 |
| 2005 | 118 | 167 |
| 2006 | 125 | 201 |
| 2007 | 128 | 228 |
| 2008 | 102 | 257 |
| 2009 | 130 | 263 |
| 2010 | 168 | 275 |
| 2011 | 157 | 257 |
| 2012 | 236 | 184 |
| 2013 | 233 | 168 |
| 2014 | 199 | 167 |
| 2015 | 205 | 213 |
| 2016 | 165 | 166 |
| 2017 | 178 | 197 |
| 2018 | 128 | 167 |
| 2019 | 168 | 153 |
| 2020 | 152 | 163 |
| 2021 | 176 | 118 |
| 2022 | 126 | 142 |
| 2023 | 110 | 79 |
| 2024 | 86 | 83 |
| 2025 | 83 | 59 |
| 2026 | 33 | 40 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Desulfurization method29 Sep 2026US 12,747,685 B2Subaru Corporation
- Exhaust gas aftertreatment system with two SCR catalysts29 Sep 2026US 12,747,686 B1FEV Group GmbH
- Display driving device comprising an emission circuit and positive feedback circuit22 Sep 2026US 12,742,407 B2Purem GmbH
- Saddle-type vehicle with exhaust pipe catalyst arrangement15 Sep 2026US 12,736,004 B2Kawasaki Motors, Ltd.
- Internal combustion engine system15 Sep 2026US 12,736,016 B2Toyota Jidosha Kabushiki Kaisha
- Exhaust purification device8 Oct 2026US 2026/0307009 A1Mazda Motor Corporation
- System for treating an exhaust gas8 Oct 2026US 2026/0307052 A1Johnson Matthey Public Limited Company
- An exhaust gas treatment system for treating an exhaust gas stream exiting a gasoline engine1 Oct 2026US 2026/0295528 A1
- Exhaust gas aftertreatment system with two scr catalysts1 Oct 2026US 2026/0298123 A1FEV Group GmbH
- Multiple heater exhaust aftertreatment system architecture and methods of control thereof24 Sep 2026US 2026/0286875 A1Cummins Inc.
Most cited
By later US patents
- Treatment of diesel exhaust gases207US 4,902,487 AJohnson Matthey PLC · 1990
- Method and apparatus for reducing nitrogen oxides from internal combustion engine207US 5,272,871 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1993
- Exhaust purification device of internal combustion engine199US 5,473,887 AToyota Jidosha Kabushiki Kaisha · 1995
- Compact vacuum insulation176US 5,157,893 AMidwest Research Institute · 1992
- Method and apparatus for desulfating a no.sub.x trap176US 5,974,788 AFord Global Technologies, LLC · 1999