B01D 53/54
Nitrogen compounds
B01D53/54 (Nitrogen compounds) appears on 1,324 US grants and 1,152 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,324
- Published applications
- 1,152
- Assignees
- 832
- Inventors
- 3,215
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 14 | 0 |
| 1978 | 17 | 0 |
| 1979 | 10 | 0 |
| 1980 | 15 | 0 |
| 1981 | 9 | 0 |
| 1982 | 13 | 0 |
| 1983 | 12 | 0 |
| 1984 | 7 | 0 |
| 1985 | 5 | 0 |
| 1986 | 9 | 0 |
| 1987 | 9 | 0 |
| 1988 | 18 | 0 |
| 1989 | 27 | 0 |
| 1990 | 21 | 0 |
| 1991 | 18 | 0 |
| 1992 | 23 | 0 |
| 1993 | 25 | 0 |
| 1994 | 23 | 0 |
| 1995 | 23 | 0 |
| 1996 | 30 | 0 |
| 1997 | 25 | 0 |
| 1998 | 26 | 0 |
| 1999 | 26 | 0 |
| 2000 | 29 | 0 |
| 2001 | 27 | 9 |
| 2002 | 29 | 16 |
| 2003 | 24 | 27 |
| 2004 | 13 | 39 |
| 2005 | 14 | 29 |
| 2006 | 13 | 19 |
| 2007 | 22 | 20 |
| 2008 | 19 | 32 |
| 2009 | 15 | 21 |
| 2010 | 21 | 31 |
| 2011 | 24 | 46 |
| 2012 | 28 | 51 |
| 2013 | 38 | 66 |
| 2014 | 54 | 74 |
| 2015 | 56 | 78 |
| 2016 | 43 | 55 |
| 2017 | 40 | 54 |
| 2018 | 42 | 72 |
| 2019 | 69 | 62 |
| 2020 | 64 | 56 |
| 2021 | 45 | 52 |
| 2022 | 51 | 58 |
| 2023 | 32 | 52 |
| 2024 | 32 | 54 |
| 2025 | 37 | 49 |
| 2026 | 20 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Exhaust system and exhaust method using buffer29 Sep 2026US 12,746,501 B2Samsung Electronics Co., Ltd.
- Flue gas purification system for hazardous waste incineration and purification method25 Aug 2026US 12,714,969 B2Chongqing Greening Environmental Protection Co. Ltd
- Furnace operation method11 Aug 2026US 12,703,652 B2American Air Liquide, Inc.
- Method and device for removing ammonia from exhaust air from a livestock stable4 Aug 2026US 12,697,583 B2
- Absorption column comprising a feed box having a serrated weir and a structured packing and process for the production of nitric acid28 Jul 2026US 12,692,156 B2Yara International Asa
- Removal of atmospheric pollutants from gas, related apparatus, processes and uses thereof24 Sep 2026US 2026/0284589 A1Intelligent Abatement, LLC
- Tractor24 Sep 2026US 2026/0286874 A1Kubota Corporation
- Combination carbon monoxide and nitrogen dioxide scrubber treatment and process17 Sep 2026US 2026/0273461 A1
- Reduction of nox emissions from semiconductor process tools17 Sep 2026US 2026/0273463 A1Taiwan Semiconductor Manufacturing Company.Ltd
- Exhaust gas treatment apparatus10 Sep 2026US 2026/0263994 A1Nanomist Technologies Co., Ltd.
Most cited
By later US patents
- Process for removal or mercury vapor and/or vapor of noxious organic compounds and/or nitrogen oxides from flue gas from an incinerator plant206US 4,889,698 AA/S Niro Atomizer · 1989
- Generation of nitric oxide from air for medical uses171US 5,396,882 AThe General Hospital Corporation · 1995
- Methods for removing air pollutants from combustion flue gas143US 5,670,122 AEnergy and Environmental Research Corporation · 1997
- Surgery plume filter device and method of filtering123US 5,522,808 AEnviroSurgical, Inc. · 1996
- Method for the removal of mercury and nitrogen oxides from combustion flue gas121US 6,375,909 B1Infilco Degremont Inc. · 2002