B01D 2255/9032
Two zones
B01D2255/9032 (Two zones) appears on 303 US grants and 436 published applications in this corpus.
Search patents in B01D- Granted patents
- 303
- Published applications
- 436
- Assignees
- 73
- Inventors
- 720
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 4 |
| 2011 | 1 | 14 |
| 2012 | 7 | 12 |
| 2013 | 7 | 13 |
| 2014 | 9 | 20 |
| 2015 | 12 | 22 |
| 2016 | 16 | 35 |
| 2017 | 30 | 29 |
| 2018 | 18 | 55 |
| 2019 | 29 | 40 |
| 2020 | 38 | 28 |
| 2021 | 32 | 28 |
| 2022 | 24 | 31 |
| 2023 | 29 | 42 |
| 2024 | 15 | 30 |
| 2025 | 22 | 13 |
| 2026 | 10 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Exhaust gas purification device and method for manufacturing exhaust gas purification device29 Sep 2026US 12,746,533 B2Cataler Corporation
- 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
- Gas treatment system, semiconductor process system including the same, and gas treatment method using the same26 May 2026US 12,636,612 B2Samsung Electronics Co., Ltd.
- Exhaust gas purification catalyst device7 Apr 2026US 12,594,525 B2Cataler Corporation
- Gas treatment system, semiconductor process system including the same, and gas treatment method using the same10 Sep 2026US 2026/0264013 A1Samsung Electronics Co., Ltd.
- Exhaust Gas Purification Catalyst20 Aug 2026US 2026/0243188 A1Cataler Corporation
- A multifunctional catalyst system30 Jul 2026US 2026/0216650 A1Dinex A/S
- Ammonia oxidation catalyst with zoned scr inlet and pgm outlet for gasoline applications23 Jul 2026US 2026/0208105 A1BASF SE
- Exhaust Gas Purification Catalyst23 Jul 2026US 2026/0208107 A1Cataler Corporation
Most cited
By later US patents
- SCR on low thermal mass filter substrates45US 7,998,423 B2BASF SE · 2011
- Diesel oxidation catalyst and use thereof in diesel and advanced combustion diesel engine systems26US 9,440,192 B2BASF SE · 2016
- Double layered exhaust gas purification catalyst25US 8,853,120 B2Toyota Jidosha Kabushiki Kaisha · 2014
- Oxidation catalyst for treating the exhaust gas of a compression ignition engine25US 9,034,286 B2Johnson Matthey Public Limited Company · 2015
- Oxidation catalyst for treating the exhaust gas of a compression ignition engine22US 9,527,034 B2Johnson Matthey Public Limited Company · 2016