F01N 3/023
Using means for regenerating the filters
Official title: using means for regenerating the filters, e.g. by burning trapped particles
F01N3/023 (Using means for regenerating the filters) appears on 3,071 US grants and 3,234 published applications in this corpus.
Search patents in F01N- Granted patents
- 3,071
- Published applications
- 3,234
- Assignees
- 678
- Inventors
- 5,206
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 8 | 0 |
| 1982 | 14 | 0 |
| 1983 | 13 | 0 |
| 1984 | 21 | 0 |
| 1985 | 35 | 0 |
| 1986 | 26 | 0 |
| 1987 | 26 | 0 |
| 1988 | 19 | 0 |
| 1989 | 39 | 0 |
| 1990 | 26 | 0 |
| 1991 | 37 | 0 |
| 1992 | 26 | 0 |
| 1993 | 30 | 0 |
| 1994 | 11 | 0 |
| 1995 | 27 | 0 |
| 1996 | 17 | 0 |
| 1997 | 20 | 0 |
| 1998 | 28 | 0 |
| 1999 | 24 | 0 |
| 2000 | 24 | 0 |
| 2001 | 19 | 14 |
| 2002 | 27 | 56 |
| 2003 | 35 | 89 |
| 2004 | 65 | 140 |
| 2005 | 73 | 144 |
| 2006 | 92 | 139 |
| 2007 | 86 | 159 |
| 2008 | 76 | 194 |
| 2009 | 94 | 215 |
| 2010 | 109 | 186 |
| 2011 | 131 | 196 |
| 2012 | 155 | 132 |
| 2013 | 155 | 183 |
| 2014 | 155 | 125 |
| 2015 | 156 | 155 |
| 2016 | 121 | 111 |
| 2017 | 125 | 139 |
| 2018 | 100 | 132 |
| 2019 | 149 | 138 |
| 2020 | 124 | 130 |
| 2021 | 125 | 102 |
| 2022 | 98 | 118 |
| 2023 | 124 | 96 |
| 2024 | 101 | 72 |
| 2025 | 67 | 44 |
| 2026 | 30 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01N 3/025Using fuel burner or by adding fuel to exhaust1,051
- F01N 3/027Using electric or magnetic heating means758
- F01N 3/0231Using special exhaust apparatus upstream of the filter for producing nitrogen dioxide409
- F01N 3/029By adding non-fuel substances to exhaust178
- F01N 3/0233Periodically cleaning filter by blowing a gas through the filter in a172
- F01N 3/0235Using exhaust gas throttling means101
- F01N 3/0232Removing incombustible material from a particle filter64
- F01N 3/0238For regenerating during engine standstill61
Recent patents
- Display driving device comprising an emission circuit and positive feedback circuit22 Sep 2026US 12,742,407 B2Purem GmbH
- System and method for controlling a cold light off catalyst8 Sep 2026US 12,729,639 B2Fca US LLC
- Systems and methods for reducing emissions with smart alternator18 Aug 2026US 12,709,274 B2Cummins Inc.
- Filter regeneration process18 Aug 2026US 12,710,004 B1GM Global Technology Operations LLC
- Burner for an exhaust-gas aftertreatment system, exhaust-gas aftertreatment system for an internal combustion engine11 Aug 2026US 12,704,085 B2Robert Bosch GmbH
- Multiple heater exhaust aftertreatment system architecture and methods of control thereof24 Sep 2026US 2026/0286875 A1Cummins Inc.
- Prime mover systems including variable speed clutches for alternators and methods of controlling same17 Sep 2026US 2026/0280456 A1Cummins Inc.
- System and method for controlling a cold light off catalyst3 Sep 2026US 2026/0258742 A1Fca US LLC
- Exhaust system and features thereof27 Aug 2026US 2026/0251080 A1ECC TEC MSJ Incorporated
- Rapid exhaust catalyst heating using a glow plug27 Aug 2026US 2026/0251081 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Device for removal of contaminants from fluid streams235US 5,750,026 ACorning Incorporated · 1998
- Treatment of diesel exhaust gases207US 4,902,487 AJohnson Matthey PLC · 1990
- Exhaust gas purification device for an internal combustion engine197US 5,974,791 AToyota Jidosha Kabushiki Kaisha · 1999
- System comprising duel-fuel and after treatment for heavy-heavy duty diesel (HHDD) engines180US 10,287,943 B1Clean Power Technologies, LLC · 2019
- Low emission, diesel-cycle engine158US 6,470,682 B2The United States of America as represented by the Administrator of the United States Environmental Protection Agency · 2002