F01N 2470/04
Characterised by shape, disposition or dimensions of apertures
Official title: characterised by shape, disposition or dimensions of apertures
F01N2470/04 (Characterised by shape, disposition or dimensions of apertures) appears on 145 US grants and 151 published applications in this corpus.
Search patents in F01N- Granted patents
- 145
- Published applications
- 151
- Assignees
- 100
- Inventors
- 383
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 2 |
| 2002 | 5 | 3 |
| 2003 | 1 | 2 |
| 2004 | 2 | 2 |
| 2005 | 2 | 2 |
| 2006 | 1 | 4 |
| 2007 | 0 | 6 |
| 2008 | 2 | 0 |
| 2009 | 3 | 8 |
| 2010 | 4 | 5 |
| 2011 | 7 | 3 |
| 2012 | 5 | 2 |
| 2013 | 1 | 9 |
| 2014 | 9 | 7 |
| 2015 | 3 | 14 |
| 2016 | 7 | 6 |
| 2017 | 5 | 6 |
| 2018 | 7 | 8 |
| 2019 | 9 | 13 |
| 2020 | 6 | 9 |
| 2021 | 8 | 9 |
| 2022 | 10 | 7 |
| 2023 | 13 | 11 |
| 2024 | 4 | 6 |
| 2025 | 6 | 2 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Muffler for internal combustion engines25 Aug 2026US 12,716,373 B2Plaggio & C. S.P.A.
- Tunable exhaust system16 Dec 2025US 12,497,913 B2Advanced Flow Engineering, Inc.
- Sound absorbing element with low profile micro-louver slits and muffler assembly using the same9 Dec 2025US 12,492,654 B2ACS Industries, Inc.
- Dosing and mixing assemblies for exhaust aftertreatment system18 Nov 2025US 12,473,851 B2Donaldson Company, Inc.
- Muffler, exhaust system including a muffler, and method of making a muffler for an exhaust system11 Nov 2025US 12,467,392 B2Purem GmbH
- Exhaust gas aftertreatment13 Aug 2026US 2026/0233162 A1Proventia Oy
- Exhaust gas mixer with annular orifice23 Jul 2026US 2026/0208130 A1Tenneco Automotive Operating Company Inc.
- Nozzle designs for secondary air injection in exhaust aftertreatment systems with electrical heaters9 Jul 2026US 2026/0194000 A1Corning Incorporated
- Mixing path for an exhaust gas system of an internal combustion engine4 Jun 2026US 2026/0153043 A1Purem GmbH
- Tunable Exhaust System2 Apr 2026US 2026/0092544 A1Advanced Flow Engineering, Inc.
Most cited
By later US patents
- Vehicle exhaust system118US 7,766,123 B2Yamaha Hatsudoki Kabushiki Kaisha · 2010
- Method of forming a double wall, air gap exhaust duct component66US 5,170,557 ABenteler Industries, Inc. · 1992
- Exhaust silencer arrangement52US 6,158,214 AJ. Eberspächer GmbH & Co. KG · 2000
- Reductant injection and decomposition system49US 8,240,137 B2Cummins Filtration IP, Inc. · 2012
- Electrically regenerable diesel particulate trap46US 5,258,164 AMinnesota Mining and Manufacturing Company · 1993