F01N 3/0842
Nitrogen oxides
Official title: {Nitrogen oxides}
F01N3/0842 (Nitrogen oxides) appears on 1,907 US grants and 1,986 published applications in this corpus.
Search patents in F01N- Granted patents
- 1,907
- Published applications
- 1,986
- Assignees
- 345
- Inventors
- 2,989
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 19 | 0 |
| 1996 | 4 | 0 |
| 1997 | 11 | 0 |
| 1998 | 30 | 0 |
| 1999 | 32 | 0 |
| 2000 | 40 | 0 |
| 2001 | 82 | 33 |
| 2002 | 87 | 101 |
| 2003 | 78 | 124 |
| 2004 | 102 | 128 |
| 2005 | 92 | 95 |
| 2006 | 93 | 117 |
| 2007 | 67 | 96 |
| 2008 | 50 | 106 |
| 2009 | 60 | 109 |
| 2010 | 71 | 83 |
| 2011 | 66 | 72 |
| 2012 | 76 | 51 |
| 2013 | 61 | 78 |
| 2014 | 67 | 49 |
| 2015 | 73 | 75 |
| 2016 | 54 | 94 |
| 2017 | 97 | 114 |
| 2018 | 71 | 127 |
| 2019 | 113 | 83 |
| 2020 | 82 | 85 |
| 2021 | 80 | 63 |
| 2022 | 59 | 43 |
| 2023 | 31 | 21 |
| 2024 | 29 | 18 |
| 2025 | 14 | 10 |
| 2026 | 9 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Desulfurization method29 Sep 2026US 12,747,685 B2Subaru Corporation
- Systems including a hydrogen internal combustion engine and aftertreatment system1 Sep 2026US 12,723,528 B2Cummins Emission Solutions Inc.
- Catalyzed soot filter with reduced ammonia oxidation1 Sep 2026US 12,723,531 B2BASF Mobile Emissions Catalysts LLC
- Mild-hybrid electric vehicle (MHEV) emissions aftertreatment system18 Aug 2026US 12,710,025 B2Saudi Arabian Oil Company
- Purification system21 Jul 2026US 12,687,123 B2Isuzu Motors Limited
- Catalytic materials comprising fe-containing zeolitic material for the treatment of an exhaust gas1 Oct 2026US 2026/0295569 A1
- Tractor24 Sep 2026US 2026/0286874 A1Kubota Corporation
- Aqueous composition having improved properties for the treatment of exhaust gases10 Sep 2026US 2026/0266209 A1Totalenergies Onetech
- Exhaust aftertreatment system, an engine system, and methods for controlling operation thereof3 Sep 2026US 2026/0258743 A1Volvo Truck Corporation
- Reduction of nox and n2o in the exhaust gas of ship motors operated using nh330 Jul 2026US 2026/0216649 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
- Exhaust purification device of internal combustion engine199US 5,473,887 AToyota Jidosha Kabushiki Kaisha · 1995
- Exhaust gas purification device for an internal combustion engine197US 5,974,791 AToyota Jidosha Kabushiki Kaisha · 1999
- Method and apparatus for desulfating a no.sub.x trap176US 5,974,788 AFord Global Technologies, LLC · 1999
- Apparatus and method for internal combustion engine control173US 5,657,625 AMitsubishi Jidosha Kogyo Kabushiki Kaisha · 1997