F01N 3/0212
With one or more perforated tubes surrounded by filtering material
Official title: {with one or more perforated tubes surrounded by filtering material, e.g. filter candles}
F01N3/0212 (With one or more perforated tubes surrounded by filtering material) appears on 65 US grants and 27 published applications in this corpus.
Search patents in F01N- Granted patents
- 65
- Published applications
- 27
- Assignees
- 38
- Inventors
- 132
- Latest grant
- 25 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 11 | 0 |
| 1994 | 2 | 0 |
| 1995 | 6 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 3 |
| 2006 | 0 | 1 |
| 2007 | 2 | 2 |
| 2008 | 1 | 3 |
| 2009 | 0 | 2 |
| 2010 | 0 | 2 |
| 2011 | 3 | 4 |
| 2012 | 0 | 2 |
| 2013 | 4 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 2 |
| 2018 | 2 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Exhaust gas cleaning system and method for cleaning exhaust gas and use of exhaust gas cleaning system25 Feb 2025US 12,234,756 B2Alfa Laval Corporate AB
- Systems and methods for controlling flow distribution in an aftertreatment system28 Dec 2021US 11,208,927 B2Cummins Emission Solutions Inc.
- Glass catalyst compositions for improved hydrothermal durability24 Jul 2018US 10,030,556 B2University of Notre Dame du Lac
- Muffler for pneumatic power tool and pneumatic power tool incorporating the same27 Mar 2018US 9,925,655 B2Exhaust Technologies, Inc.
- Filter device for filtering automobile exhaust gas19 Nov 2013US 8,584,447 B2Alantum Corporation
- Exhaust gas cleaning system and method for cleaning exhaust gas and use of exhaust gas cleaning system17 Nov 2022US 2022/0364487 A1Alfa Laval Corporate AB
- Systems and methods for controlling flow distribution in an aftertreatment system6 May 2021US 2021/0131329 A1Cummins Emission Solutions Inc.
- Muffler for pneumatic power tool and pneumatic power tool incorporating the same2 Feb 2017US 2017/0028544 A1Exhaust Technologies, Inc.
- Glass catalyst compositions for improved hydrothermal durability19 Jan 2017US 2017/0016367 A1University of Notre Dame du Lac
- Filter media and method of forming thereof4 Jun 2015US 2015/0151236 A1BHA Altair, LLC
Most cited
By later US patents
- Self supporting hot gas filter assembly76US 5,453,116 AMinnesota Mining and Manufacturing Company · 1995
- Concentric-tube diesel particulate filter62US 5,171,341 AMinnesota Mining and Manufacturing Company · 1992
- Heat isolated catalytic reactor56US 5,488,826 ADry Systems Technologies · 1996
- Regenerable diesel exhaust filter and heater53US 5,457,945 APall Corporation · 1995
- Electrically regenerable diesel particulate trap46US 5,258,164 AMinnesota Mining and Manufacturing Company · 1993