B01D 53/8621
Removing nitrogen compounds
Official title: {Removing nitrogen compounds}
B01D53/8621 (Removing nitrogen compounds) appears on 1,715 US grants and 1,469 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,715
- Published applications
- 1,469
- Assignees
- 830
- Inventors
- 4,053
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 26 | 0 |
| 1978 | 28 | 0 |
| 1979 | 16 | 0 |
| 1980 | 15 | 0 |
| 1981 | 16 | 0 |
| 1982 | 12 | 0 |
| 1983 | 2 | 0 |
| 1984 | 9 | 0 |
| 1985 | 3 | 0 |
| 1986 | 8 | 0 |
| 1987 | 14 | 0 |
| 1988 | 43 | 0 |
| 1989 | 35 | 0 |
| 1990 | 37 | 0 |
| 1991 | 25 | 0 |
| 1992 | 41 | 0 |
| 1993 | 33 | 0 |
| 1994 | 32 | 0 |
| 1995 | 36 | 0 |
| 1996 | 33 | 0 |
| 1997 | 23 | 0 |
| 1998 | 31 | 0 |
| 1999 | 24 | 0 |
| 2000 | 42 | 0 |
| 2001 | 30 | 15 |
| 2002 | 45 | 37 |
| 2003 | 41 | 43 |
| 2004 | 27 | 53 |
| 2005 | 25 | 47 |
| 2006 | 21 | 43 |
| 2007 | 26 | 38 |
| 2008 | 31 | 38 |
| 2009 | 28 | 54 |
| 2010 | 52 | 65 |
| 2011 | 52 | 71 |
| 2012 | 43 | 74 |
| 2013 | 66 | 71 |
| 2014 | 60 | 75 |
| 2015 | 60 | 84 |
| 2016 | 48 | 71 |
| 2017 | 52 | 56 |
| 2018 | 55 | 83 |
| 2019 | 60 | 62 |
| 2020 | 55 | 67 |
| 2021 | 57 | 52 |
| 2022 | 50 | 70 |
| 2023 | 47 | 50 |
| 2024 | 32 | 54 |
| 2025 | 33 | 55 |
| 2026 | 25 | 41 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Selective catalytic reduction catalyst module support system and installation method15 Sep 2026US 12,736,221 B2Lummus Technology Inc.
- 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
- Flue gas purification system for hazardous waste incineration and purification method25 Aug 2026US 12,714,969 B2Chongqing Greening Environmental Protection Co. Ltd
- 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
- Plant and method for burning carbonate rock24 Sep 2026US 2026/0285749 A1Scheuch Management Holding GmbH
- Reduction of nox emissions from semiconductor process tools17 Sep 2026US 2026/0273463 A1Taiwan Semiconductor Manufacturing Company.Ltd
- In-situ regeneration of filter medium for improving catalytic efficiency10 Sep 2026US 2026/0264016 A1W. L. Gore & Associates, Inc.
Most cited
By later US patents
- Composition of synthetic porous crystalline material, its synthesis183US 5,102,643 AMobil Oil Corporation · 1992
- Synthetic mesoporous crystaline material177US 5,098,684 AMobil Oil Corporation · 1992
- Method for synthesizing mesoporous crystalline material158US 5,057,296 AMobil Oil Corporation · 1991
- Flue gas control system of coal combustion boiler and operating method thereof122US 8,071,060 B2Mitsubishi Heavy Industries, Ltd. · 2011
- Thermally insulative smoking article filter components111US 7,878,209 B2Philip Morris USA Inc. · 2011