B01D 2255/9035
Three zones
B01D2255/9035 (Three zones) appears on 77 US grants and 106 published applications in this corpus.
Search patents in B01D- Granted patents
- 77
- Published applications
- 106
- Assignees
- 33
- Inventors
- 278
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 2 |
| 2012 | 2 | 4 |
| 2013 | 1 | 1 |
| 2014 | 4 | 2 |
| 2015 | 2 | 4 |
| 2016 | 1 | 6 |
| 2017 | 8 | 7 |
| 2018 | 6 | 12 |
| 2019 | 7 | 8 |
| 2020 | 9 | 8 |
| 2021 | 6 | 9 |
| 2022 | 7 | 11 |
| 2023 | 8 | 7 |
| 2024 | 6 | 9 |
| 2025 | 6 | 7 |
| 2026 | 3 | 4 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Composite, zoned oxidation catalyst for a compression ignition internal combustion engine25 Aug 2026US 12,714,990 B2Johnson Matthey Public Limited Company
- Performance enhancement of a platinum-containing catalyst via exhaust gas hydrogen enrichment16 Jun 2026US 12,654,160 B2BASF Mobile Emissions Catalysts LLC
- Diesel oxidation catalyst6 Jan 2026US 12,515,208 B2Umicore AG & Co. KG
- Composite, zoned oxidation catalyst for a compression ignition internal combustion engine1 Jul 2025US 12,343,714 B2Johnson Matthey Public Limited Company
- Composite, zone-coated, dual-use ammonia (AMOX) and nitric oxide oxidation catalyst3 Jun 2025US 12,318,760 B2Johnson Matthey Public Limited Company
- Exhaust gas purification catalyst composition, exhaust gas purification catalyst and exhaust gas purification system3 Sep 2026US 2026/0257173 A1Mitsui Mining & Smelting Co., Ltd.
- A multifunctional catalyst system30 Jul 2026US 2026/0216650 A1Dinex A/S
- Method for the manufacture of a catalytic gasoline particulate filter26 Mar 2026US 2026/0084140 A1Johnson Matthey Public Limited Compaany
- Selective catalytic reduction system for exhaust gas treatment, and exhaust gas purification apparatus for lean combustion engines comprising selective catalytic reduction system for exhaust gas treatment22 Jan 2026US 2026/0021449 A1N. E. Chemcat Corporation
- Exhaust gas purification device and method for manufacturing exhaust gas purification device18 Dec 2025US 2025/0381525 A1Cataler Corporation
Most cited
By later US patents
- Integrated SCR and AMOx catalyst systems28US 8,293,182 B2BASF SE · 2012
- Zoned catalytic filters for treatment of exhaust gas16US 8,789,356 B2Johnson Matthey Public Limited Company · 2014
- Catalytic converter16US 9,579,633 B2Toyota Jidosha Kabushiki Kaisha · 2017
- Layered automotive catalyst composites14US 10,512,898 B2BASF SE · 2019
- Perovskite with an ovlerlayer SCR component as an ammonia oxidation catalyst and a system for exhaust emission control on diesel engines14US 9,649,596 B2Johnson Matthey Public Limited Company · 2017