F01N 3/029
By adding non-fuel substances to exhaust
Official title: by adding non-fuel substances to exhaust
F01N3/029 (By adding non-fuel substances to exhaust) appears on 178 US grants and 201 published applications in this corpus.
Search patents in F01N- Granted patents
- 178
- Published applications
- 201
- Assignees
- 117
- Inventors
- 482
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 3 |
| 2003 | 0 | 6 |
| 2004 | 4 | 4 |
| 2005 | 8 | 9 |
| 2006 | 2 | 7 |
| 2007 | 4 | 6 |
| 2008 | 2 | 6 |
| 2009 | 2 | 11 |
| 2010 | 3 | 10 |
| 2011 | 8 | 7 |
| 2012 | 8 | 3 |
| 2013 | 3 | 5 |
| 2014 | 5 | 5 |
| 2015 | 4 | 7 |
| 2016 | 2 | 4 |
| 2017 | 5 | 6 |
| 2018 | 3 | 10 |
| 2019 | 9 | 18 |
| 2020 | 11 | 23 |
| 2021 | 18 | 13 |
| 2022 | 14 | 10 |
| 2023 | 17 | 13 |
| 2024 | 11 | 11 |
| 2025 | 5 | 4 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Display driving device comprising an emission circuit and positive feedback circuit22 Sep 2026US 12,742,407 B2Purem GmbH
- Treatment of particulate filters28 Jul 2026US 12,692,807 B2Johnson Matthey Public Limited Company
- System and method for reducing internal combustion engine emissions23 Sep 2025US 12,421,881 B2Saudi Arabian Oil Company
- Exhaust system, controller and method for an internal combustion engine5 Aug 2025US 12,378,905 B2Jaguar Land Rover Limited
- Exhaust treatment method and apparatus having particulate filters and SCR6 May 2025US 12,291,987 B2Corning Incorporated
- Ignited reducing compositions and methods for catalytically decomposing exhaust gas mixtures9 Oct 2025US 2025/0314185 A1Altered Labs LLC
- Systems including a hydrogen internal combustion engine and aftertreatment system2 Oct 2025US 2025/0305431 A1Cummins Emission Solutions Inc.
- Exhaust treatment method and apparatus having particulate filters and scr24 Jul 2025US 2025/0237161 A1Corning Incorporated
- Mixer Assembly20 Feb 2025US 2025/0059903 A1Tenneco Inc.
- System and method for reducing internal combustion engine emissions28 Nov 2024US 2024/0392711 A1Aramco Overseas Company B.V.
Most cited
By later US patents
- Treatment of diesel exhaust gases207US 4,902,487 AJohnson Matthey PLC · 1990
- Low pressure injection and turbulent mixing in selective catalytic reduction system134US 6,449,947 B1Fleetguard, Inc. · 2002
- Exhaust aftertreatment device, including chemical mixing and acoustic effects87US 6,722,123 B2Fleetguard, Inc. · 2004
- Methods for reducing harmful emissions from a diesel engine61US 6,003,303 AClean Diesel Technologies, Inc. · 1999
- Operation of diesel engines with reduced particulate emission by utilization of platinum group metal fuel additive and pass-through catalytic oxidizer57US 5,501,714 APlatinum Plus, Inc. · 1996