F01N 3/208
Control of selective catalytic reduction [scr]
Official title: {Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent}
F01N3/208 (Control of selective catalytic reduction [scr]) appears on 2,033 US grants and 2,378 published applications in this corpus.
Search patents in F01N- Granted patents
- 2,033
- Published applications
- 2,378
- Assignees
- 413
- Inventors
- 3,491
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 1 |
| 2002 | 7 | 6 |
| 2003 | 5 | 9 |
| 2004 | 9 | 19 |
| 2005 | 9 | 16 |
| 2006 | 10 | 20 |
| 2007 | 8 | 37 |
| 2008 | 10 | 36 |
| 2009 | 15 | 90 |
| 2010 | 33 | 115 |
| 2011 | 47 | 133 |
| 2012 | 87 | 102 |
| 2013 | 114 | 160 |
| 2014 | 126 | 149 |
| 2015 | 160 | 228 |
| 2016 | 163 | 162 |
| 2017 | 169 | 161 |
| 2018 | 137 | 162 |
| 2019 | 174 | 178 |
| 2020 | 177 | 137 |
| 2021 | 138 | 102 |
| 2022 | 117 | 101 |
| 2023 | 89 | 79 |
| 2024 | 84 | 63 |
| 2025 | 72 | 72 |
| 2026 | 38 | 40 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Engine device6 Oct 2026US 12,753,713 B2Yanmar Holdings Co., Ltd.
- Exhaust gas aftertreatment system with two SCR catalysts29 Sep 2026US 12,747,686 B1FEV Group GmbH
- Decomposition chamber for aftertreatment system22 Sep 2026US 12,742,406 B2Cummins Emission Solutions Inc.
- Post-processing system15 Sep 2026US 12,736,003 B2Isuzu Motors Limited
- Exhaust gas purification apparatus1 Sep 2026US 12,723,529 B2Isuzu Motors Limited
- Pressurized systems and methods for providing a nebulized catalyst8 Oct 2026US 2026/0309066 A1Jake Vernon LLC
- Containerized ultra-low nox diesel engine generator set with roof-mounted selective catalytic reduction system8 Oct 2026US 2026/0309075 A1Industrial Service Solutions WC, Inc.
- Decomposition chamber for aftertreatment system1 Oct 2026US 2026/0298121 A1Cummins Emission Solutions Inc.
- Aftertreatment system and engine system1 Oct 2026US 2026/0298122 A1Yanmar Holdings Co., Ltd.
- Exhaust gas aftertreatment system with two scr catalysts1 Oct 2026US 2026/0298123 A1FEV Group GmbH
Most cited
By later US patents
- Reducing no.sub.x emissions from an engine by temperature-controlled urea injection for selective catalytic reduction171US 6,063,350 AClean Diesel Technologies, Inc. · 2000
- Method of and control for monitoring and controlling an electric motor for driving a pump170US 10,018,096 B2Maxon Motor AG · 2018
- Staged reductant injection for improved NO.sub.x reduction157US 6,125,629 AEngelhard Corporation · 2000
- Method and apparatus for controlled introduction of a reducing agent into a nitrogen oxide-containing exhaust gas153US 5,628,186 ASiemens Aktiengesellschaft · 1997
- Exhaust gas purification system for an internal combustion engine133US 5,201,802 AToyota Jidosha Kabushiki Kaisha · 1993