F01N 2610/02
The substance being ammonia or urea
Official title: the substance being ammonia or urea
F01N2610/02 (The substance being ammonia or urea) appears on 3,727 US grants and 4,435 published applications in this corpus.
Search patents in F01N- Granted patents
- 3,727
- Published applications
- 4,435
- Assignees
- 729
- Inventors
- 6,240
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 7 | 0 |
| 1998 | 14 | 0 |
| 1999 | 18 | 0 |
| 2000 | 17 | 0 |
| 2001 | 30 | 11 |
| 2002 | 32 | 25 |
| 2003 | 22 | 42 |
| 2004 | 33 | 66 |
| 2005 | 40 | 52 |
| 2006 | 31 | 63 |
| 2007 | 26 | 122 |
| 2008 | 37 | 126 |
| 2009 | 59 | 193 |
| 2010 | 83 | 238 |
| 2011 | 100 | 247 |
| 2012 | 168 | 161 |
| 2013 | 206 | 211 |
| 2014 | 193 | 239 |
| 2015 | 231 | 331 |
| 2016 | 239 | 318 |
| 2017 | 312 | 333 |
| 2018 | 244 | 312 |
| 2019 | 343 | 279 |
| 2020 | 269 | 258 |
| 2021 | 258 | 196 |
| 2022 | 214 | 188 |
| 2023 | 164 | 140 |
| 2024 | 127 | 118 |
| 2025 | 128 | 90 |
| 2026 | 46 | 76 |
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 rectifier and exhaust gas purification system1 Sep 2026US 12,723,530 B2Yanmar Holdings Co., Ltd.
- Catalyzed soot filter with reduced ammonia oxidation1 Sep 2026US 12,723,531 B2BASF Mobile Emissions Catalysts LLC
- Emissions management for diesel series hybrid powertrains25 Aug 2026US 12,715,426 B2Cummins Inc.
- Work vehicle and aftertreatment system therefor25 Aug 2026US 12,716,375 B2Deere & Company
- Containerized ultra-low nox diesel engine generator set with roof-mounted selective catalytic reduction system8 Oct 2026US 2026/0309075 A1Industrial Service Solutions WC, Inc.
- Ultra-low nox diesel engine generator with selective catalytic reduction engineered exhaust system and method1 Oct 2026US 2026/0298124 A1Industrial Service Solutions WC, Inc.
- Composite of manganese-based oxide and zeolite useful as nh3-scr catalyst24 Sep 2026US 2026/0284594 A1
- Exhaust aftertreatment system24 Sep 2026US 2026/0286878 A1Donaldson Company, Inc.
- Compression ignition engine and system utilizing ammonia as a fuel source24 Sep 2026US 2026/0286881 A1Analytical Engineering, Inc.
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
- 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
- Method and apparatus for emission control148US 6,314,722 B1Matros Technologies, Inc. · 2001
- Low pressure injection and turbulent mixing in selective catalytic reduction system134US 6,449,947 B1Fleetguard, Inc. · 2002