F01N 3/0231
Using special exhaust apparatus upstream of the filter for producing nitrogen dioxide
Official title: {using special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]}
F01N3/0231 (Using special exhaust apparatus upstream of the filter for producing nitrogen dioxide) appears on 409 US grants and 475 published applications in this corpus.
Search patents in F01N- Granted patents
- 409
- Published applications
- 475
- Assignees
- 181
- Inventors
- 912
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 0 |
| 2002 | 4 | 15 |
| 2003 | 4 | 25 |
| 2004 | 24 | 35 |
| 2005 | 17 | 33 |
| 2006 | 18 | 37 |
| 2007 | 20 | 32 |
| 2008 | 18 | 39 |
| 2009 | 25 | 35 |
| 2010 | 31 | 31 |
| 2011 | 27 | 32 |
| 2012 | 24 | 20 |
| 2013 | 20 | 23 |
| 2014 | 25 | 15 |
| 2015 | 34 | 31 |
| 2016 | 16 | 9 |
| 2017 | 15 | 17 |
| 2018 | 13 | 9 |
| 2019 | 11 | 5 |
| 2020 | 6 | 8 |
| 2021 | 12 | 4 |
| 2022 | 5 | 10 |
| 2023 | 9 | 3 |
| 2024 | 3 | 6 |
| 2025 | 4 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Emission treatment catalysts, systems and methods26 May 2026US 12,636,613 B2BASF Mobile Emissions Catalysts LLC
- Systems and methods for cold operation NOx burden reduction23 Sep 2025US 12,421,910 B2Cummins Inc.
- Composite, zoned oxidation catalys for a compression ignition internal combustion engine13 May 2025US 12,296,319 B2Johnson Matthey Public Limited Company
- Exhaust treatment method and apparatus having particulate filters and SCR6 May 2025US 12,291,987 B2Corning Incorporated
- Control device and method for controlling an exhaust gas aftertreatment system28 Jan 2025US 12,209,520 B2Scania CV AB
- Exhaust treatment method and apparatus having particulate filters and scr24 Jul 2025US 2025/0237161 A1Corning Incorporated
- Emission treatment catalysts, systems and methods19 Sep 2024US 2024/0307822 A1BASF SE
- Systems and methods for cold operation nox burden reduction1 Aug 2024US 2024/0254938 A1Cummins Inc.
- Exhaust treatment method and apparatus having particulate filters and scr16 May 2024US 2024/0159174 A1Corning Incorporated
- Control device and method for controlling an exhaust gas aftertreatment system9 May 2024US 2024/0151171 A1Scania CV AB
Most cited
By later US patents
- Treatment of diesel exhaust gases207US 4,902,487 AJohnson Matthey PLC · 1990
- Method and apparatus for emission control148US 6,314,722 B1Matros Technologies, Inc. · 2001
- Method for purifying exhaust gas of a diesel engine146US 5,746,989 AToyota Jidosha Kabushiki Kaisha · 1998
- Catalyzed SCR filter and emission treatment system132US 7,229,597 B2BASFD Catalysts LLC · 2007
- Catalytic wall-flow filter103US 6,753,294 B1Johnson Matthey Public Limited Company · 2004