F01N 1/082
By passing the exhaust gases through porous members
Official title: {by passing the exhaust gases through porous members}
F01N1/082 (By passing the exhaust gases through porous members) appears on 90 US grants and 63 published applications in this corpus.
Search patents in F01N- Granted patents
- 90
- Published applications
- 63
- Assignees
- 71
- Inventors
- 172
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 3 |
| 2004 | 2 | 2 |
| 2005 | 2 | 3 |
| 2006 | 0 | 1 |
| 2007 | 2 | 2 |
| 2008 | 3 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 4 | 2 |
| 2012 | 2 | 3 |
| 2013 | 0 | 1 |
| 2014 | 4 | 4 |
| 2015 | 1 | 1 |
| 2016 | 1 | 4 |
| 2017 | 1 | 4 |
| 2018 | 4 | 2 |
| 2019 | 2 | 4 |
| 2020 | 2 | 6 |
| 2021 | 2 | 1 |
| 2022 | 5 | 7 |
| 2023 | 7 | 3 |
| 2024 | 2 | 2 |
| 2025 | 5 | 5 |
| 2026 | 1 | 0 |
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.
- Muffler and method for making a muffler9 Dec 2025US 12,492,653 B2Purem GmbH
- Exhaust gas assembly28 Oct 2025US 12,454,902 B2The University of Adelaide
- Work vehicle and aftertreatment system therefor7 Oct 2025US 12,435,654 B1Deere & Company
- Convertible silencer15 Jul 2025US 12,359,594 B2Discovery Energy, LLC
- Convertible silencer25 Dec 2025US 2025/0389215 A1Discovery Energy, LLC
- Sound damper, in particular for a fuel-cell system20 Nov 2025US 2025/0357515 A1Purem GmbH
- Handheld work apparatus, and exhaust gas after-treatment unit for a handheld work apparatus, and exhaust muffler9 Oct 2025US 2025/0314190 A1Andreas Stihl AG & CO.KG
- Convertible silencer6 Feb 2025US 2025/0043706 A1Discovery Energy, LLC
- Exhaust gas assembly2 Jan 2025US 2025/0003359 A1The University of Adelaide
Most cited
By later US patents
- Filter for gases57US 5,009,857 ASchwaebische Huettenwerke GmbH · 1991
- Use of materials comprising microbubbles as acoustical barriers50US 5,658,656 AMinnesota Mining and Manufacturing Company · 1997
- Muffler49US 4,132,286 ANihon Radiator Co., Ltd. · 1979
- Emission control apparatus38US 5,016,438 AHarris International Sales Corporation · 1991
- Automotive exhaust system33US 4,530,418 A1985