F01N 3/323
Electrically driven air pumps
Official title: {Electrically driven air pumps}
F01N3/323 (Electrically driven air pumps) appears on 91 US grants and 88 published applications in this corpus.
Search patents in F01N- Granted patents
- 91
- Published applications
- 88
- Assignees
- 50
- Inventors
- 252
- Latest grant
- 9 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 3 | 1 |
| 2004 | 2 | 6 |
| 2005 | 2 | 7 |
| 2006 | 3 | 4 |
| 2007 | 3 | 1 |
| 2008 | 1 | 0 |
| 2009 | 1 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 3 |
| 2012 | 0 | 6 |
| 2013 | 1 | 5 |
| 2014 | 7 | 5 |
| 2015 | 5 | 3 |
| 2016 | 3 | 5 |
| 2017 | 7 | 6 |
| 2018 | 3 | 3 |
| 2019 | 5 | 5 |
| 2020 | 4 | 6 |
| 2021 | 4 | 5 |
| 2022 | 9 | 5 |
| 2023 | 10 | 7 |
| 2024 | 6 | 2 |
| 2025 | 1 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Internal combustion engine for a motor vehicle, in particular for a motor car9 Sep 2025US 12,410,744 B2Mercedes-Benz Group AG
- Systems and methods for reducing aftertreatment system NOX emissions12 Nov 2024US 12,140,096 B2Cummins Emission Solutions Inc.
- Internal combustion engine for a motor vehicle, and motor vehicle2 Jul 2024US 12,025,042 B2Mercedes-Benz Group AG
- Systems and methods for reducing aftertreatment system NOx emissions2 Apr 2024US 11,946,428 B2Cummins Emission Solutions Inc.
- Method and apparatus for electrically heating a catalytic converter20 Feb 2024US 11,905,871 B2Vitesco Technologies GmbH
- Systems and methods for zero nox emissions during an operating period30 Oct 2025US 2025/0334091 A1Cummins Inc.
- Pre-heat system for upstream elements and catalysts of a selective catalytic reduction device9 Oct 2025US 2025/0314186 A1Safety Power Inc.
- Internal Combustion Engine for a Motor Vehicle, in Particular for a Motor Car21 Nov 2024US 2024/0384681 A1Mercedes-Benz Group AG
- Method and Apparatus for Electrically Heating a Catalytic Converter11 Jan 2024US 2024/0011423 A1Vitesco Technologies GmbH
- Systems and methods for reducing aftertreatment system nox emissions30 Nov 2023US 2023/0383707 A1Cummins Emission Solutions Inc.
Most cited
By later US patents
- Method and apparatus for estimating and controlling no x trap temperature88US 5,746,049 AFord Global Technologies, LLC · 1998
- Secondary air system for an internal combustion engine29US 6,094,909 AFilterwerk Mann & Hummel GmbH · 2000
- Method and a device for purifying exhaust gas of an internal combustion engine27US 5,979,157 AToyota Jidosha Kabushiki Kaisha · 1999
- Automotive hydrocarbon adsorber system25US 5,916,133 ACorning Incorporated · 1999
- Secondary air control apparatus for exhaust gas purifier18US 5,675,968 AMitsubishi Denki Kabushiki Kaisha · 1997