F01N 2470/00
Structure or shape of exhaust gas passages, pipes or tubes
F01N2470/00 (Structure or shape of exhaust gas passages, pipes or tubes) appears on 1,896 US grants and 1,691 published applications in this corpus.
Search patents in F01N- Granted patents
- 1,896
- Published applications
- 1,691
- Assignees
- 648
- Inventors
- 3,826
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 6 | 0 |
| 1978 | 12 | 0 |
| 1979 | 8 | 0 |
| 1980 | 25 | 0 |
| 1981 | 10 | 0 |
| 1982 | 16 | 0 |
| 1983 | 14 | 0 |
| 1984 | 8 | 0 |
| 1985 | 3 | 0 |
| 1986 | 11 | 0 |
| 1987 | 19 | 0 |
| 1988 | 16 | 0 |
| 1989 | 24 | 0 |
| 1990 | 37 | 0 |
| 1991 | 22 | 0 |
| 1992 | 22 | 0 |
| 1993 | 24 | 0 |
| 1994 | 22 | 0 |
| 1995 | 31 | 0 |
| 1996 | 16 | 0 |
| 1997 | 23 | 0 |
| 1998 | 29 | 0 |
| 1999 | 22 | 0 |
| 2000 | 23 | 0 |
| 2001 | 23 | 7 |
| 2002 | 27 | 27 |
| 2003 | 25 | 30 |
| 2004 | 26 | 41 |
| 2005 | 24 | 32 |
| 2006 | 18 | 48 |
| 2007 | 13 | 54 |
| 2008 | 31 | 55 |
| 2009 | 35 | 75 |
| 2010 | 41 | 78 |
| 2011 | 51 | 59 |
| 2012 | 68 | 76 |
| 2013 | 69 | 73 |
| 2014 | 86 | 96 |
| 2015 | 84 | 101 |
| 2016 | 93 | 103 |
| 2017 | 86 | 89 |
| 2018 | 63 | 90 |
| 2019 | 93 | 103 |
| 2020 | 92 | 104 |
| 2021 | 85 | 95 |
| 2022 | 98 | 78 |
| 2023 | 90 | 60 |
| 2024 | 52 | 57 |
| 2025 | 57 | 37 |
| 2026 | 5 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01N 2470/02Tubes being perforatedIndexing code541
- F01N 2470/18The axis of inlet or outlet tubes being other than the longitudinalIndexing code454
- F01N 2470/24Concentric tubes or tubes being concentric to housingIndexing code402
- F01N 2470/20Dimensional characteristics of tubesIndexing code196
- F01N 2470/30Tubes with restrictions, i.e. venturi or the likeIndexing code193
- F01N 2470/14Plurality of outlet tubesIndexing code189
- F01N 2470/10Tubes having non-circular cross sectionIndexing code174
- F01N 2470/16Plurality of inlet tubesIndexing code174
All 14 subgroupsShow fewer
- F01N 2470/06Tubes being formed by assembly of stamped or otherwise deformed sheet-metalIndexing code138
- F01N 2470/08Exhaust gas passages being formed between the walls of an outer shellIndexing code133
- F01N 2470/22Inlet and outlet tubes being positioned on the same side of theIndexing code97
- F01N 2470/12Tubes being corrugatedIndexing code93
- F01N 2470/26Tubes being formed by extrusion, drawing or rollingIndexing code32
- F01N 2470/28Tubes being formed by moulding or casting xIndexing code13
Recent patents
- Saddle-type vehicle with exhaust pipe catalyst arrangement15 Sep 2026US 12,736,004 B2Kawasaki Motors, Ltd.
- Muffler for internal combustion engines25 Aug 2026US 12,716,373 B2Plaggio & C. S.P.A.
- Exhaust component14 Jul 2026US 12,680,492 B2Futaba Industrial Co., Ltd.
- Exhaust purification apparatus5 May 2026US 12,618,352 B2Toyota Jidosha Kabushiki Kaisha
- Catalytic converter for a motor vehicle, as well as a motor vehicle31 Mar 2026US 12,590,554 B2Mercedes-Benz Group AG
- Two Stage Box Mixer20 Aug 2026US 2026/0241349 A1Tenneco Automotive Operating Company Inc.
- Dual Venturi Exhaust Assembly20 Aug 2026US 2026/0243189 A1
- Exhaust gas aftertreatment13 Aug 2026US 2026/0233162 A1Proventia Oy
- Decomposition chamber for aftertreatment system13 Aug 2026US 2026/0235063 A1Cummins Emission Solutions Inc.
- Fluid piping6 Aug 2026US 2026/0227020 A1Nissan Motor Co., Ltd.
Most cited
By later US patents
- Connecting structure for exhaust pipes269US 6,406,066 B1Honda Giken Kogyo Kabushiki Kaisha · 2002
- Method and apparatus for reducing nitrogen oxides from internal combustion engine207US 5,272,871 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1993
- Mobile power generation system151US 11,125,156 B2Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. · 2021
- Low pressure EGR system for diesel engines149US 6,301,887 B1Engelhard Corporation · 2001
- Straight through muffler with conically-ended output passage126US 6,158,546 ATenneco Automotive Inc. · 2000