F01N 3/105
General auxiliary catalysts
Official title: {General auxiliary catalysts, e.g. upstream or downstream of the main catalyst}
F01N3/105 (General auxiliary catalysts) appears on 1,169 US grants and 1,468 published applications in this corpus.
Search patents in F01N- Granted patents
- 1,169
- Published applications
- 1,468
- Assignees
- 301
- Inventors
- 2,465
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 2 |
| 2004 | 3 | 6 |
| 2005 | 2 | 10 |
| 2006 | 6 | 15 |
| 2007 | 8 | 53 |
| 2008 | 14 | 58 |
| 2009 | 25 | 79 |
| 2010 | 31 | 95 |
| 2011 | 38 | 95 |
| 2012 | 70 | 79 |
| 2013 | 93 | 91 |
| 2014 | 86 | 88 |
| 2015 | 99 | 124 |
| 2016 | 84 | 94 |
| 2017 | 95 | 91 |
| 2018 | 53 | 85 |
| 2019 | 87 | 78 |
| 2020 | 66 | 78 |
| 2021 | 80 | 44 |
| 2022 | 59 | 59 |
| 2023 | 48 | 49 |
| 2024 | 55 | 44 |
| 2025 | 45 | 25 |
| 2026 | 17 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus and method for lambda control of spark-ignition engines, and motor vehicle29 Sep 2026US 12,747,711 B2Schaeffler Technologies AG & Co. KG
- Exhaust gas purification apparatus1 Sep 2026US 12,723,529 B2Isuzu Motors Limited
- Work vehicle and aftertreatment system therefor25 Aug 2026US 12,716,375 B2Deere & Company
- Method to determine the oxygen storage capacity of a catalytic converter of an exhaust gas system of an internal combustion engine14 Jul 2026US 12,680,491 B2Marelli Europe S.P.A.
- Catalytic heater for an exhaust gas system of an internal combustion engine, exhaust gas system and method of operating an exhaust gas system23 Jun 2026US 12,662,955 B2Purem GmbH
- System for treating an exhaust gas8 Oct 2026US 2026/0307052 A1Johnson Matthey Public Limited Company
- Improved hydrocarbon trap for cold-start hydrocarbon control from internal combustion engines1 Oct 2026US 2026/0295527 A1
- Composite of manganese-based oxide and zeolite useful as nh3-scr catalyst24 Sep 2026US 2026/0284594 A1
- Multi-stage emission system for large displacement compression ignition non-road diesel, diesel-natural gas or alternative fuel mixture generator systems for emergency and non-emergency stationary power applications17 Sep 2026US 2026/0275892 A1Bluefin ESI, Inc.
- Exhaust aftertreatment system, an engine system, and methods for controlling operation thereof3 Sep 2026US 2026/0258743 A1Volvo Truck Corporation
Most cited
By later US patents
- Layered catalyst composite162US 5,597,771 AEngelhard Corporation · 1997
- Method and apparatus for controlled introduction of a reducing agent into a nitrogen oxide-containing exhaust gas153US 5,628,186 ASiemens Aktiengesellschaft · 1997
- Catalyzed SCR filter and emission treatment system132US 7,229,597 B2BASFD Catalysts LLC · 2007
- Integrated NOx and PM reduction devices for the treatment of emissions from internal combustion engines116US 7,062,904 B1Eaton Corporation · 2006
- Adaptive exhaust temperature estimation and control105US 5,722,236 AFord Global Technologies, LLC · 1998