B01D 53/9418
For removing nitrogen oxides by selective catalytic reduction [scr] using a reducing
Official title: {for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas}
B01D53/9418 (For removing nitrogen oxides by selective catalytic reduction [scr] using a reducing) appears on 1,649 US grants and 1,862 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,649
- Published applications
- 1,862
- Assignees
- 468
- Inventors
- 3,131
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 12 | 0 |
| 1978 | 13 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 11 | 0 |
| 1993 | 6 | 0 |
| 1994 | 15 | 0 |
| 1995 | 15 | 0 |
| 1996 | 13 | 0 |
| 1997 | 10 | 0 |
| 1998 | 29 | 0 |
| 1999 | 22 | 0 |
| 2000 | 26 | 0 |
| 2001 | 19 | 10 |
| 2002 | 14 | 6 |
| 2003 | 13 | 16 |
| 2004 | 15 | 21 |
| 2005 | 7 | 10 |
| 2006 | 14 | 20 |
| 2007 | 10 | 28 |
| 2008 | 8 | 26 |
| 2009 | 11 | 56 |
| 2010 | 28 | 77 |
| 2011 | 23 | 79 |
| 2012 | 41 | 85 |
| 2013 | 74 | 73 |
| 2014 | 69 | 91 |
| 2015 | 83 | 117 |
| 2016 | 79 | 108 |
| 2017 | 96 | 152 |
| 2018 | 100 | 193 |
| 2019 | 175 | 148 |
| 2020 | 132 | 122 |
| 2021 | 119 | 101 |
| 2022 | 97 | 94 |
| 2023 | 81 | 81 |
| 2024 | 63 | 75 |
| 2025 | 54 | 41 |
| 2026 | 17 | 32 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Selective catalytic reduction catalyst for the treatment of an exhaust gas8 Sep 2026US 12,728,409 B2BASF Mobile Emissions Catalysts LLC
- Catalyzed soot filter with reduced ammonia oxidation1 Sep 2026US 12,723,531 B2BASF Mobile Emissions Catalysts LLC
- Decomposition chamber with guide swirl mixer11 Aug 2026US 12,704,086 B2Cummins Emission Solutions Inc.
- Apparatus for reducing greenhouse gas emission in vessel and vessel including the same14 Jul 2026US 12,678,736 B2Daewoo Shipbuilding & Marine Engineering Co., Ltd.
- Process for preparing zeolite material having an AFX framework structure and zeolite material as prepared9 Jun 2026US 12,649,666 B2BASF Mobile Emissions Catalysts LLC
- Method for producing fe-doped beta zeolite catalyst monoliths8 Oct 2026US 2026/0307064 A1BASF SE
- Catalytic materials comprising fe-containing zeolitic material for the treatment of an exhaust gas1 Oct 2026US 2026/0295569 A1
- Composite of manganese-based oxide and zeolite useful as nh3-scr catalyst24 Sep 2026US 2026/0284594 A1
- Exhaust gas purification catalyst device3 Sep 2026US 2026/0257210 A1Cataler Corporation
- Systems and methods for diesel oxidation catalyst aging prognostics and diagnosis27 Aug 2026US 2026/0249244 A1Cummins Inc.
Most cited
By later US patents
- Method for reduction of nitrogen oxides with ammonia using promoted zeolite catalysts223US 4,961,917 AEngelhard Corporation · 1990
- Staged metal-promoted zeolite catalysts and method for catalytic reduction of nitrogen oxides using the same156US 5,516,497 AEngelhard Corporation · 1996
- NOx decreasing apparatus for an internal combustion engine153US 5,412,946 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1995
- Method and apparatus for emission control148US 6,314,722 B1Matros Technologies, Inc. · 2001
- Catalyzed SCR filter and emission treatment system132US 7,229,597 B2BASFD Catalysts LLC · 2007