B01D 2251/2062
Ammonia
B01D2251/2062 (Ammonia) appears on 1,009 US grants and 1,266 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,009
- Published applications
- 1,266
- Assignees
- 495
- Inventors
- 2,529
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 1 | 0 |
| 1994 | 8 | 0 |
| 1995 | 5 | 0 |
| 1996 | 10 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 9 | 3 |
| 2002 | 6 | 4 |
| 2003 | 4 | 7 |
| 2004 | 9 | 8 |
| 2005 | 4 | 22 |
| 2006 | 11 | 14 |
| 2007 | 11 | 37 |
| 2008 | 12 | 41 |
| 2009 | 17 | 62 |
| 2010 | 34 | 91 |
| 2011 | 43 | 97 |
| 2012 | 61 | 71 |
| 2013 | 74 | 61 |
| 2014 | 70 | 72 |
| 2015 | 59 | 96 |
| 2016 | 67 | 88 |
| 2017 | 59 | 67 |
| 2018 | 54 | 70 |
| 2019 | 72 | 62 |
| 2020 | 46 | 48 |
| 2021 | 57 | 36 |
| 2022 | 33 | 54 |
| 2023 | 33 | 48 |
| 2024 | 29 | 42 |
| 2025 | 32 | 37 |
| 2026 | 14 | 28 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Nitrogen oxide removing denitrification catalyst having high durability against sulfur dioxide, method for preparing the same, and method for removing nitrogen oxide using the same8 Sep 2026US 12,728,406 B2Korea Institute of Science and Technology
- Multi-stage ammonia-based decarbonization11 Aug 2026US 12,703,638 B2Jiangnan Environmental Protection Group Inc.
- Furnace operation method11 Aug 2026US 12,703,652 B2American Air Liquide, 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.
- System and method for lowering nitrogen oxides content from tail gas30 Jun 2026US 12,667,808 B2
- Method for producing fe-doped beta zeolite catalyst monoliths8 Oct 2026US 2026/0307064 A1BASF SE
- Control systems and methods for exhaust pollution mitigation1 Oct 2026US 2026/0295519 A1ECC TEC MSJ Incorporated
- Composite of manganese-based oxide and zeolite useful as nh3-scr catalyst24 Sep 2026US 2026/0284594 A1
- In-situ regeneration of filter medium for improving catalytic efficiency10 Sep 2026US 2026/0264016 A1W. L. Gore & Associates, Inc.
- Method for optimizing ammonia injection control of denitrification system in thermal power plants considering the characteristics of incoming coal10 Sep 2026US 2026/0268171 A1Datang Environment Industry Group Co., Ltd.
Most cited
By later US patents
- Apparatus for manufacturing a process abatement reactor386US 7,736,600 B2APPLIED Materials.Inc. · 2010
- 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
- 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