B01D 2251/2067
Urea
B01D2251/2067 (Urea) appears on 775 US grants and 994 published applications in this corpus.
Search patents in B01D- Granted patents
- 775
- Published applications
- 994
- Assignees
- 350
- Inventors
- 1,875
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 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 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 7 | 0 |
| 2001 | 2 | 1 |
| 2002 | 5 | 2 |
| 2003 | 1 | 3 |
| 2004 | 2 | 4 |
| 2005 | 1 | 7 |
| 2006 | 5 | 9 |
| 2007 | 4 | 26 |
| 2008 | 7 | 29 |
| 2009 | 7 | 51 |
| 2010 | 20 | 75 |
| 2011 | 24 | 72 |
| 2012 | 52 | 67 |
| 2013 | 66 | 46 |
| 2014 | 53 | 49 |
| 2015 | 58 | 65 |
| 2016 | 43 | 68 |
| 2017 | 51 | 69 |
| 2018 | 51 | 55 |
| 2019 | 84 | 54 |
| 2020 | 53 | 53 |
| 2021 | 46 | 35 |
| 2022 | 27 | 39 |
| 2023 | 28 | 34 |
| 2024 | 30 | 34 |
| 2025 | 29 | 27 |
| 2026 | 11 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Exhaust gas rectifier and exhaust gas purification system1 Sep 2026US 12,723,530 B2Yanmar Holdings Co., Ltd.
- Flue gas purification system for hazardous waste incineration and purification method25 Aug 2026US 12,714,969 B2Chongqing Greening Environmental Protection Co. Ltd
- 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.
- Systems and methods for ammonia recovery, acid gas separation, or combination thereof7 Jul 2026US 12,673,876 B2Innovator Energy, LLC
- Control systems and methods for exhaust pollution mitigation1 Oct 2026US 2026/0295519 A1ECC TEC MSJ Incorporated
- Structural body and design method therefor, and liquid droplet atomization system including structural body1 Oct 2026US 2026/0295526 A1Tokai University Educational System
- Exhaust aftertreatment system24 Sep 2026US 2026/0286878 A1Donaldson Company, Inc.
- Aqueous composition having improved properties for the treatment of exhaust gases10 Sep 2026US 2026/0266209 A1Totalenergies Onetech
- Waste handling for renewable transportation fuel processes13 Aug 2026US 2026/0233159 A1Honeywell International 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
- Catalyzed SCR filter and emission treatment system132US 7,229,597 B2BASFD Catalysts LLC · 2007
- Reducing NO.sub.x emissions from an engine by temperature-controlled urea injection for selective catalytic reduction120US 5,976,475 AClean Diesel Technologies, Inc. · 1999
- Method for converting exhaust gases from a diesel engine using nitrogen oxide absorbent96US 6,182,443 B2Ford Global Technologies, LLC · 2001
- Thermally regenerable nitric oxide adsorbent90US 8,105,559 B2Johnson Matthey Public Limited Company · 2012