B01D 2255/9037
More than three zones
B01D2255/9037 (More than three zones) appears on 20 US grants and 27 published applications in this corpus.
Search patents in B01D- Granted patents
- 20
- Published applications
- 27
- Assignees
- 8
- Inventors
- 64
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 3 | 1 |
| 2015 | 1 | 0 |
| 2016 | 1 | 3 |
| 2017 | 1 | 0 |
| 2018 | 1 | 5 |
| 2019 | 4 | 1 |
| 2020 | 2 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 1 |
| 2023 | 2 | 3 |
| 2024 | 0 | 5 |
| 2025 | 2 | 1 |
| 2026 | 2 | 2 |
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
- Sulfur-containing organic compound assisted metal nanoparticle synthesis for three-way catalysis application17 Feb 2026US 12,551,869 B2Johnson Matthey Public Limited Company
- Composite, zoned oxidation catalyst for a compression ignition internal combustion engine1 Jul 2025US 12,343,714 B2Johnson Matthey Public Limited Company
- Composite, zoned oxidation catalys for a compression ignition internal combustion engine13 May 2025US 12,296,319 B2Johnson Matthey Public Limited Company
- Composite, zoned oxidation catalyst for a compression ignition internal combustion engine19 Dec 2023US 11,845,064 B2
- Exhaust Gas Purification Catalyst20 Aug 2026US 2026/0243188 A1Cataler Corporation
- Exhaust Gas Purification Catalyst23 Jul 2026US 2026/0208107 A1Cataler Corporation
- Composite, zoned oxidation catalyst for a compression ignition internal combustion engine18 Sep 2025US 2025/0288980 A1Johnson Matthey Public Limited Company
- Sulfur-containing organic compound assisted metal nanoparticle synthesis for three-way catalysis application15 Aug 2024US 2024/0269612 A1Johnson Matthey Public Limited Company
- Ammonia slip catalyst filter11 Jul 2024US 2024/0226864 A1Johnson Matthey Public Limited Company
Most cited
By later US patents
- Gasoline engine emissions treatment systems having particulate filters32US 8,815,189 B2BASF SE · 2014
- Ammonia slip catalyst designed to be first in an SCR system16US 10,201,807 B2Johnson Matthey Public Limited Company · 2019
- Zoned catalytic filters for treatment of exhaust gas16US 8,789,356 B2Johnson Matthey Public Limited Company · 2014
- Layered automotive catalyst composites14US 10,512,898 B2BASF SE · 2019
- Exhaust system without a DOC having an ASC acting as a DOC in a system with an SCR catalyst before the ASC12US 9,937,489 B2Johnson Matthey Public Limited Company · 2018