B01D 2255/50
Zeolites
B01D2255/50 (Zeolites) appears on 1,300 US grants and 1,716 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,300
- Published applications
- 1,716
- Assignees
- 397
- Inventors
- 2,528
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 7 | 0 |
| 1993 | 3 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 7 | 0 |
| 1997 | 2 | 0 |
| 1998 | 8 | 0 |
| 1999 | 10 | 0 |
| 2000 | 14 | 0 |
| 2001 | 12 | 10 |
| 2002 | 13 | 14 |
| 2003 | 14 | 16 |
| 2004 | 14 | 17 |
| 2005 | 7 | 14 |
| 2006 | 10 | 23 |
| 2007 | 6 | 27 |
| 2008 | 13 | 38 |
| 2009 | 15 | 75 |
| 2010 | 29 | 96 |
| 2011 | 29 | 96 |
| 2012 | 61 | 73 |
| 2013 | 67 | 76 |
| 2014 | 75 | 87 |
| 2015 | 68 | 139 |
| 2016 | 87 | 106 |
| 2017 | 92 | 105 |
| 2018 | 88 | 147 |
| 2019 | 115 | 107 |
| 2020 | 91 | 93 |
| 2021 | 90 | 76 |
| 2022 | 65 | 69 |
| 2023 | 57 | 70 |
| 2024 | 47 | 71 |
| 2025 | 39 | 35 |
| 2026 | 20 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Selective catalytic reduction catalyst for the treatment of an exhaust gas8 Sep 2026US 12,728,409 B2BASF Mobile Emissions Catalysts LLC
- Catalytic material for treating an exhaust gas produced by a natural gas engine1 Sep 2026US 12,722,145 B2Johnson Matthey Public Limited Company
- Air purifier with air treatment basket30 Jun 2026US 12,667,809 B2BISSELL Inc.
- Nanotubes in porous particles23 Jun 2026US 12,661,634 B2The Administrators of the Tulane Educational Fund
- Process for preparing zeolite material having an AFX framework structure and zeolite material as prepared9 Jun 2026US 12,649,666 B2BASF Mobile Emissions Catalysts LLC
- Catalytic article comprising vanadium-containing catalyst and oxidation catalyst8 Oct 2026US 2026/0307065 A1
- Improved hydrocarbon trap for cold-start hydrocarbon control from internal combustion engines1 Oct 2026US 2026/0295527 A1
- Catalytic materials comprising fe-containing zeolitic material for the treatment of an exhaust gas1 Oct 2026US 2026/0295569 A1
- Apparatus, system and method for processing exhaust gas24 Sep 2026US 2026/0284574 A1Taiwan Semiconductor Manufacturing Company.Ltd
- Composite of manganese-based oxide and zeolite useful as nh3-scr catalyst24 Sep 2026US 2026/0284594 A1
Most cited
By later US patents
- Method for reduction of nitrogen oxides with ammonia using promoted zeolite catalysts223US 4,961,917 AEngelhard Corporation · 1990
- 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
- Exhaust emission control device for a diesel engine106US 4,934,142 AToyota Jidosha Kabushiki Kaisha · 1990
- Plasma fuel processing for NOx control of lean burn engines101US 6,176,078 B1Engelhard Corporation · 2001