B01D 2251/00
Reactants
B01D2251/00 (Reactants) appears on 4,679 US grants and 6,217 published applications in this corpus.
Search patents in B01D- Granted patents
- 4,679
- Published applications
- 6,217
- Assignees
- 2,414
- Inventors
- 11,645
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 13 | 0 |
| 1978 | 4 | 0 |
| 1979 | 7 | 0 |
| 1980 | 9 | 0 |
| 1981 | 10 | 0 |
| 1982 | 1 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 7 | 0 |
| 1989 | 7 | 0 |
| 1990 | 7 | 0 |
| 1991 | 8 | 0 |
| 1992 | 16 | 0 |
| 1993 | 10 | 0 |
| 1994 | 26 | 0 |
| 1995 | 16 | 0 |
| 1996 | 31 | 0 |
| 1997 | 48 | 0 |
| 1998 | 49 | 0 |
| 1999 | 39 | 0 |
| 2000 | 41 | 0 |
| 2001 | 44 | 14 |
| 2002 | 30 | 37 |
| 2003 | 29 | 37 |
| 2004 | 28 | 59 |
| 2005 | 35 | 84 |
| 2006 | 42 | 86 |
| 2007 | 37 | 122 |
| 2008 | 59 | 200 |
| 2009 | 71 | 263 |
| 2010 | 174 | 426 |
| 2011 | 166 | 365 |
| 2012 | 247 | 291 |
| 2013 | 290 | 314 |
| 2014 | 285 | 311 |
| 2015 | 270 | 325 |
| 2016 | 238 | 340 |
| 2017 | 273 | 329 |
| 2018 | 253 | 317 |
| 2019 | 305 | 307 |
| 2020 | 268 | 292 |
| 2021 | 253 | 258 |
| 2022 | 210 | 281 |
| 2023 | 185 | 305 |
| 2024 | 185 | 301 |
| 2025 | 211 | 326 |
| 2026 | 115 | 227 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 2251/20ReductantsIndexing code2,142
- B01D 2251/60Inorganic bases or saltsIndexing code1,253
- B01D 2251/40Alkaline earth metal or magnesium compoundsIndexing code1,104
- B01D 2251/30Alkali metal compoundsIndexing code948
- B01D 2251/10OxidantsIndexing code814
- B01D 2251/50Inorganic acidsIndexing code198
- B01D 2251/95Specific microorganismsIndexing code147
- B01D 2251/80Organic bases or saltsIndexing code108
All 10 subgroupsShow fewer
Recent patents
- Photochemical method and device for volatile organic compound pollution control22 Sep 2026US 12,741,248 B2Ambient Carbon Methane Holding Aps
- Carbon dioxide processing agent and method for producing same22 Sep 2026US 12,741,272 B2Eau De Merus Co., Ltd.
- 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
- Hydrated lime for carbon capture1 Sep 2026US 12,722,136 B1Lhoist North America, Inc.
- Exhaust gas rectifier and exhaust gas purification system1 Sep 2026US 12,723,530 B2Yanmar Holdings Co., Ltd.
- Filter system for the removal of volatile organosulfur compounds (voscs) from indoor air8 Oct 2026US 2026/0306980 A1Air Tech Group, SLU
- Catalytic reactor and system for purification of carbon dioxide streams and methods of using the same8 Oct 2026US 2026/0307007 A1Oxy Low Carbon Ventures, LLC
- System for treating an exhaust gas8 Oct 2026US 2026/0307052 A1Johnson Matthey Public Limited Company
- Method for producing fe-doped beta zeolite catalyst monoliths8 Oct 2026US 2026/0307064 A1BASF SE
- Co2 capture and hydrogen recovery from fuel cell anode off gas8 Oct 2026US 2026/0312104 A1Uop LLC
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
- Flue gas mercury control214US 8,080,088 B12011
- Method and apparatus for reducing nitrogen oxides from internal combustion engine207US 5,272,871 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1993
- System and method for sequestration and separation of mercury in combustion exhaust gas aqueous scrubber systems182US 7,722,843 B12010