B01D 2255/9155
Wall flow filters
B01D2255/9155 (Wall flow filters) appears on 592 US grants and 842 published applications in this corpus.
Search patents in B01D- Granted patents
- 592
- Published applications
- 842
- Assignees
- 129
- Inventors
- 1,317
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 2 | 1 |
| 2005 | 0 | 3 |
| 2006 | 1 | 9 |
| 2007 | 1 | 4 |
| 2008 | 0 | 9 |
| 2009 | 4 | 9 |
| 2010 | 10 | 9 |
| 2011 | 9 | 15 |
| 2012 | 10 | 25 |
| 2013 | 15 | 19 |
| 2014 | 17 | 31 |
| 2015 | 29 | 40 |
| 2016 | 31 | 29 |
| 2017 | 26 | 56 |
| 2018 | 40 | 72 |
| 2019 | 47 | 66 |
| 2020 | 46 | 71 |
| 2021 | 66 | 85 |
| 2022 | 68 | 81 |
| 2023 | 58 | 63 |
| 2024 | 41 | 69 |
| 2025 | 47 | 40 |
| 2026 | 23 | 35 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Method for manufacturing exhaust gas purification catalyst29 Sep 2026US 12,746,538 B2Cataler Corporation
- Honeycomb structure8 Sep 2026US 12,728,377 B2NGK Insulators, Ltd.
- Selective catalytic reduction catalyst for the treatment of an exhaust gas8 Sep 2026US 12,728,409 B2BASF Mobile Emissions Catalysts LLC
- Catalyzed soot filter with reduced ammonia oxidation1 Sep 2026US 12,723,531 B2BASF Mobile Emissions Catalysts LLC
- Composite, zoned oxidation catalyst for a compression ignition internal combustion engine25 Aug 2026US 12,714,990 B2Johnson Matthey Public Limited Company
- Honeycomb structure and honeycomb filter1 Oct 2026US 2026/0295525 A1NGK Insulators, Ltd.
- Pillar-shaped honeycomb structure1 Oct 2026US 2026/0295572 A1NGK Insulators, Ltd.
- Composite of manganese-based oxide and zeolite useful as nh3-scr catalyst24 Sep 2026US 2026/0284594 A1
- Modified copper zeolites and method of using the same for treatment of gas streams containing nox24 Sep 2026US 2026/0284646 A1BASF SE
- Catalyst article for treating exhaust gas, its method of manufacture and uses thereof10 Sep 2026US 2026/0264015 A1Johnson Matthey Public Limited Company
Most cited
By later US patents
- Method and apparatus for emission control148US 6,314,722 B1Matros Technologies, Inc. · 2001
- Catalyzed SCR filter and emission treatment system132US 7,229,597 B2BASFD Catalysts LLC · 2007
- Catalytic wall-flow filter103US 6,753,294 B1Johnson Matthey Public Limited Company · 2004
- Copper CHA zeolite catalysts85US 7,601,662 B2BASF Catalysts LLC · 2009
- Method for treating soot-containing exhaust56US 7,097,817 B2Johnson Matthey Public Limited Company · 2006