F01N 13/011
Exhaust or silencing apparatus characterised by constructional features: having two or more
Official title: {having two or more purifying devices arranged in parallel}
F01N13/011 (Exhaust or silencing apparatus characterised by constructional features: having two or more) appears on 877 US grants and 820 published applications in this corpus.
Search patents in F01N- Granted patents
- 877
- Published applications
- 820
- Assignees
- 307
- Inventors
- 1,891
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 8 | 0 |
| 1990 | 8 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 13 | 0 |
| 1994 | 7 | 0 |
| 1995 | 28 | 0 |
| 1996 | 8 | 0 |
| 1997 | 18 | 0 |
| 1998 | 16 | 0 |
| 1999 | 18 | 0 |
| 2000 | 20 | 0 |
| 2001 | 26 | 8 |
| 2002 | 21 | 23 |
| 2003 | 19 | 47 |
| 2004 | 36 | 58 |
| 2005 | 38 | 66 |
| 2006 | 39 | 55 |
| 2007 | 37 | 63 |
| 2008 | 30 | 53 |
| 2009 | 29 | 44 |
| 2010 | 41 | 44 |
| 2011 | 43 | 28 |
| 2012 | 30 | 32 |
| 2013 | 25 | 26 |
| 2014 | 33 | 35 |
| 2015 | 37 | 44 |
| 2016 | 28 | 34 |
| 2017 | 33 | 30 |
| 2018 | 22 | 21 |
| 2019 | 26 | 21 |
| 2020 | 26 | 23 |
| 2021 | 19 | 10 |
| 2022 | 14 | 17 |
| 2023 | 13 | 8 |
| 2024 | 16 | 14 |
| 2025 | 12 | 8 |
| 2026 | 1 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pollutant capturer and mobilizer8 Sep 2026US 12,729,640 B2
- Car provided with an internal combustion engine having a side exhaust9 Dec 2025US 12,491,762 B2Ferrari S.P. A.
- Engine device2 Dec 2025US 12,486,793 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 purification control device7 Oct 2025US 12,435,652 B2Denso Corporation
- Gas filter element, filter device and method of use1 Oct 2026US 2026/0295490 A1Pall Corporation
- Ammonia oxidation catalyst with zoned scr inlet and pgm outlet for gasoline applications23 Jul 2026US 2026/0208105 A1BASF SE
- Working vehicle25 Jun 2026US 2026/0176993 A1Kubota Corporation
- Mixing tube for exhaust system and operating strategy for same18 Jun 2026US 2026/0168419 A1Caterpillar Inc.
- Aftertreatment system and mixing tube18 Jun 2026US 2026/0168420 A1Caterpillar Inc.
Most cited
By later US patents
- Exhaust gas purification device for an internal combustion engine197US 5,974,791 AToyota Jidosha Kabushiki Kaisha · 1999
- Ceramic structural body188US 5,914,187 AIbiden Co., Ltd. · 1999
- Apparatus and method for internal combustion engine control173US 5,657,625 AMitsubishi Jidosha Kogyo Kabushiki Kaisha · 1997
- Apparatus, method, and system for concentrating adsorbable pollutants and abatement thereof119US 6,105,365 AEngelhard Corporation · 2000
- Exhaust purification device for internal combustion engine116US 6,237,330 B1Nissan Motor Co., Ltd. · 2001