B01D 2257/406
Ammonia
B01D2257/406 (Ammonia) appears on 629 US grants and 886 published applications in this corpus.
Search patents in B01D- Granted patents
- 629
- Published applications
- 886
- Assignees
- 512
- Inventors
- 2,248
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 6 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 5 | 0 |
| 2000 | 9 | 0 |
| 2001 | 6 | 4 |
| 2002 | 9 | 11 |
| 2003 | 7 | 4 |
| 2004 | 5 | 11 |
| 2005 | 3 | 10 |
| 2006 | 6 | 8 |
| 2007 | 7 | 13 |
| 2008 | 9 | 14 |
| 2009 | 7 | 20 |
| 2010 | 11 | 43 |
| 2011 | 14 | 39 |
| 2012 | 28 | 43 |
| 2013 | 31 | 41 |
| 2014 | 30 | 24 |
| 2015 | 34 | 36 |
| 2016 | 25 | 59 |
| 2017 | 32 | 41 |
| 2018 | 33 | 43 |
| 2019 | 45 | 53 |
| 2020 | 38 | 42 |
| 2021 | 30 | 43 |
| 2022 | 33 | 42 |
| 2023 | 34 | 62 |
| 2024 | 32 | 80 |
| 2025 | 31 | 54 |
| 2026 | 29 | 46 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Air conditioning and filtration system29 Sep 2026US 12,746,502 B2Work Air Technologies Pty Ltd
- Photocatalyst filter and electronic device comprising same15 Sep 2026US 12,734,266 B2Samsung Electronics Co., Ltd.
- Manufacturing method of chemical adsorbent for removing harmful gases, and apparatus thereof15 Sep 2026US 12,734,501 B2GTScien Co., Ltd.
- Filter for air purification and manufacturing method thereof15 Sep 2026US 12,734,512 B2Hyundai Motor Company
- Gas sorption system8 Sep 2026US 12,728,384 B2Munters Europe Aktiebolag
- Exhaust purification device8 Oct 2026US 2026/0307009 A1Mazda Motor Corporation
- Modified Metal-Organic Framework (MOF) Compositions, Process of Making and Process of Use Thereof8 Oct 2026US 2026/0307047 A1NuMat Technologies, Inc.
- Catalytic article comprising vanadium-containing catalyst and oxidation catalyst8 Oct 2026US 2026/0307065 A1
- Melamine process with urea melt-based washing of melamine offgas1 Oct 2026US 2026/0297039 A1Casale SA
- Generation and utilization of ammoniated water in gasification1 Oct 2026US 2026/0297445 A1SunGas Renewables, Inc.
Most cited
By later US patents
- Respirator filter system167US 5,714,126 AMine Safety Appliances Company · 1998
- Process for purifying a gas by adsorption of the impurities on several active carbons147US 6,402,813 B2L 'Air Liquide-Societe 'Anonyme a 'Directoire et Conseil de Surveillance pour l 'Etude et L'Exploitation des Procedes Georges Claude · 2002
- Microchannel laminated mass exchanger and method of making115US 6,129,973 ABattelle Memorial Institute · 2000
- Composite adsorbent and process for producing same104US 5,231,063 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1993
- Electrical current generation system94US 6,921,597 B2QuestAir Technologies Inc. · 2005