B01D 2255/20738
Iron
B01D2255/20738 (Iron) appears on 1,081 US grants and 1,456 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,081
- Published applications
- 1,456
- Assignees
- 548
- Inventors
- 2,822
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 0 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 7 | 0 |
| 2000 | 11 | 0 |
| 2001 | 12 | 9 |
| 2002 | 6 | 9 |
| 2003 | 7 | 10 |
| 2004 | 5 | 10 |
| 2005 | 8 | 12 |
| 2006 | 4 | 16 |
| 2007 | 3 | 25 |
| 2008 | 7 | 33 |
| 2009 | 11 | 74 |
| 2010 | 31 | 84 |
| 2011 | 34 | 82 |
| 2012 | 38 | 79 |
| 2013 | 81 | 86 |
| 2014 | 66 | 90 |
| 2015 | 79 | 100 |
| 2016 | 73 | 82 |
| 2017 | 67 | 80 |
| 2018 | 66 | 97 |
| 2019 | 87 | 85 |
| 2020 | 65 | 79 |
| 2021 | 61 | 71 |
| 2022 | 61 | 57 |
| 2023 | 55 | 57 |
| 2024 | 39 | 53 |
| 2025 | 38 | 34 |
| 2026 | 14 | 42 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Complex oxides for reactive oxygen separation and related applications6 Oct 2026US 12,752,260 B2North Carolina State University
- Selective catalytic reduction catalyst for the treatment of an exhaust gas8 Sep 2026US 12,728,409 B2BASF Mobile Emissions Catalysts LLC
- Steel mill offgas separation and purification18 Aug 2026US 12,708,874 B2Air Products and Chemicals, Inc.
- Method for generating carbon monoxide, method for producing precursor, and material for chemical looping system26 May 2026US 12,637,355 B2Eneos Corporation
- Photo catalytic device for continuous process for co-conversion of CO2+H2O to C1-oxygenates in sunlight19 May 2026US 12,629,661 B2Council of Scientific and Industrial Research An Indian Registered Body Incorporated Under the Regn. of Soc. Act (Act Xxi of 1860)
- Catalytic materials comprising fe-containing zeolitic material for the treatment of an exhaust gas1 Oct 2026US 2026/0295569 A1
- System and method for treating air containing volatile organic compounds (vocs)10 Sep 2026US 2026/0264014 A1Taiwan Semiconductor Manufacturing Company.Ltd
- Method for capturing co2 and use of a metal-based surface for capturing co227 Aug 2026US 2026/0249243 A1Institut National De La Recherche Scientifique
- Catalyst composition, exhaust gas treatment method using the same, and exhaust gas treatment system including the same13 Aug 2026US 2026/0233206 A1Gwangju Institute of Science and Technology
- Synthesis of cha zeolitic materials, cha zeolitic materials obtainable therefrom and scr catalysts comprising the same13 Aug 2026US 2026/0234010 A1BASF Mobile Emissions Catalysts LLC
Most cited
By later US patents
- Method for reduction of nitrogen oxides with ammonia using promoted zeolite catalysts223US 4,961,917 AEngelhard Corporation · 1990
- System and method for sequestration and separation of mercury in combustion exhaust gas aqueous scrubber systems182US 7,722,843 B12010
- Staged metal-promoted zeolite catalysts and method for catalytic reduction of nitrogen oxides using the same156US 5,516,497 AEngelhard Corporation · 1996
- Catalyzed SCR filter and emission treatment system132US 7,229,597 B2BASFD Catalysts LLC · 2007
- Monomodal and polymodal catalyst supports and catalysts having narrow pore size distributions and their production129US 5,935,897 ABASF SE · 1999