B01D 2255/904
Multiple catalysts
B01D2255/904 (Multiple catalysts) appears on 223 US grants and 282 published applications in this corpus.
Search patents in B01D- Granted patents
- 223
- Published applications
- 282
- Assignees
- 116
- Inventors
- 629
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 5 |
| 2008 | 0 | 1 |
| 2009 | 3 | 4 |
| 2010 | 0 | 6 |
| 2011 | 1 | 4 |
| 2012 | 3 | 8 |
| 2013 | 5 | 8 |
| 2014 | 9 | 10 |
| 2015 | 9 | 25 |
| 2016 | 11 | 17 |
| 2017 | 27 | 51 |
| 2018 | 28 | 31 |
| 2019 | 31 | 22 |
| 2020 | 26 | 12 |
| 2021 | 19 | 21 |
| 2022 | 16 | 21 |
| 2023 | 15 | 11 |
| 2024 | 7 | 8 |
| 2025 | 8 | 5 |
| 2026 | 2 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Automotive 3-way catalyst system containing a tail pipe catalyst4 Aug 2026US 12,697,604 B2BASF Mobile Emissions Catalysts LLC
- Exhaust gas emissions abatement system13 Jan 2026US 12,521,696 B2Shell USA, Inc.
- Layered catalytic article and method of manufacturing the catalytic article30 Sep 2025US 12,427,504 B2BASF Mobile Emissions Catalysts LLC
- Valve arrangement for split-flow close-coupled catalyst2 Sep 2025US 12,404,794 B2Cummins Emission Solutions Inc.
- Catalytic wall-flow filter27 May 2025US 12,312,990 B1Johnson Matthey Public Limited Company
- Exhaust aftertreatment system, an engine system, and methods for controlling operation thereof3 Sep 2026US 2026/0258743 A1Volvo Truck Corporation
- Reducing the content of nox and n2o in the offgas from firing plants operated with nh3 for catalytic decomposition of nh330 Jul 2026US 2026/0216648 A1
- A multifunctional catalyst system30 Jul 2026US 2026/0216650 A1Dinex A/S
- Catalyst comprising a sulfur-trap material for the treatment of an exhaust gas stream containing one or more of formaldehyde, nitrogen oxide (no), and hydrocarbons9 Jul 2026US 2026/0192253 A1
- Nh3-scr denitration system and method for synergistic purification of co21 May 2026US 2026/0138087 A1Institute of Process Engineering, Chinese Academy of Sciences
Most cited
By later US patents
- Catalyst for exhaust gas purification and method for exhaust gas purification63US 5,376,610 ANGK Insulators, Ltd. · 1994
- Catalysed substrate monolith51US 8,667,785 B2Johnson Matthey Public Limited Company · 2014
- SCR on low thermal mass filter substrates45US 7,998,423 B2BASF SE · 2011
- Gasoline engine emissions treatment systems having particulate traps29US 8,173,087 B2BASF SE · 2012
- Diesel oxidation catalyst and use thereof in diesel and advanced combustion diesel engine systems26US 9,440,192 B2BASF SE · 2016