F01N 3/2066
Selective catalytic reduction [scr]
Official title: {Selective catalytic reduction [SCR]}
F01N3/2066 (Selective catalytic reduction [scr]) appears on 4,632 US grants and 5,623 published applications in this corpus.
Search patents in F01N- Granted patents
- 4,632
- Published applications
- 5,623
- Assignees
- 850
- Inventors
- 7,698
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 9 | 0 |
| 1998 | 15 | 0 |
| 1999 | 15 | 0 |
| 2000 | 16 | 0 |
| 2001 | 28 | 7 |
| 2002 | 27 | 23 |
| 2003 | 20 | 38 |
| 2004 | 22 | 55 |
| 2005 | 37 | 53 |
| 2006 | 33 | 62 |
| 2007 | 25 | 126 |
| 2008 | 34 | 141 |
| 2009 | 63 | 201 |
| 2010 | 78 | 266 |
| 2011 | 109 | 267 |
| 2012 | 174 | 212 |
| 2013 | 228 | 269 |
| 2014 | 233 | 327 |
| 2015 | 321 | 424 |
| 2016 | 307 | 451 |
| 2017 | 402 | 438 |
| 2018 | 330 | 437 |
| 2019 | 448 | 356 |
| 2020 | 348 | 331 |
| 2021 | 333 | 273 |
| 2022 | 282 | 263 |
| 2023 | 232 | 193 |
| 2024 | 189 | 174 |
| 2025 | 180 | 132 |
| 2026 | 73 | 104 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Desulfurization method29 Sep 2026US 12,747,685 B2Subaru Corporation
- Display driving device comprising an emission circuit and positive feedback circuit22 Sep 2026US 12,742,407 B2Purem GmbH
- Post-processing system15 Sep 2026US 12,736,003 B2Isuzu Motors Limited
- Exhaust gas purification apparatus1 Sep 2026US 12,723,529 B2Isuzu Motors Limited
- Exhaust gas rectifier and exhaust gas purification system1 Sep 2026US 12,723,530 B2Yanmar Holdings Co., Ltd.
- System for treating an exhaust gas8 Oct 2026US 2026/0307052 A1Johnson Matthey Public Limited Company
- 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.
- An exhaust gas treatment system for treating an exhaust gas stream exiting a gasoline engine1 Oct 2026US 2026/0295528 A1
- Catalytic materials comprising fe-containing zeolitic material for the treatment of an exhaust gas1 Oct 2026US 2026/0295569 A1
Most cited
By later US patents
- Method and apparatus for reducing nitrogen oxides from internal combustion engine207US 5,272,871 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1993
- System comprising duel-fuel and after treatment for heavy-heavy duty diesel (HHDD) engines180US 10,287,943 B1Clean Power Technologies, LLC · 2019
- 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
- Staged reductant injection for improved NO.sub.x reduction157US 6,125,629 AEngelhard Corporation · 2000
- Method and apparatus for emission control148US 6,314,722 B1Matros Technologies, Inc. · 2001