F01N 3/303
Filtering additional air
Official title: {Filtering additional air}
F01N3/303 (Filtering additional air) appears on 39 US grants and 40 published applications in this corpus.
Search patents in F01N- Granted patents
- 39
- Published applications
- 40
- Assignees
- 27
- Inventors
- 107
- Latest grant
- 5 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 2 |
| 2004 | 2 | 2 |
| 2005 | 2 | 8 |
| 2006 | 3 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 2 | 2 |
| 2015 | 0 | 3 |
| 2016 | 5 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 2 | 3 |
| 2020 | 2 | 0 |
| 2021 | 0 | 3 |
| 2022 | 3 | 0 |
| 2023 | 1 | 1 |
| 2024 | 3 | 8 |
| 2025 | 5 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Exhaust system, controller and method for an internal combustion engine5 Aug 2025US 12,378,905 B2Jaguar Land Rover Limited
- Exhaust gas aftertreatment system20 May 2025US 12,305,555 B2Cummins Emission Solutions Inc.
- Off-road vehicle and engine thereof8 Apr 2025US 12,270,360 B2Zhejiang CFMOTO Power Co., Ltd.
- Purification system25 Mar 2025US 12,258,897 B2Isuzu Motors Limited
- Exhaust gas purification device and engine25 Feb 2025US 12,234,761 B2Yanmar Holdings Co., Ltd.
- Exhaust gas aftertreatment system3 Oct 2024US 2024/0328337 A1Cummins Emission Solutions Inc.
- Exhaust gas purification device and engine19 Sep 2024US 2024/0309786 A1Yanmar Holdings Co., Ltd.
- Purification system19 Sep 2024US 2024/0309790 A1Isuzu Motors Limited
- Method and device for operating an internal combustion engine19 Sep 2024US 2024/0309822 A1Robert Bosch GmbH
- Exhaust system, controller and method for an internal combustion engine1 Aug 2024US 2024/0254905 A1Jaguar Land Rover Limited
Most cited
By later US patents
- Secondary air system for an internal combustion engine29US 6,094,909 AFilterwerk Mann & Hummel GmbH · 2000
- Muffler for internal combustion engine27US 5,902,971 AKioritz Corporation · 1999
- Drive assembly for a vehicle19US 6,295,817 B1DaimlerChrysler AG · 2001
- Secondary air feeding apparatus and method of detecting abnormality in the apparatus19US 6,918,245 B2Toyota Jidosha Kabushiki Kaisha · 2005
- Exhaust gas muffler18US 6,832,665 B2Advanced Car Specialties Limited · 2004