F01N 2550/04
Filtering activity of particulate filters
F01N2550/04 (Filtering activity of particulate filters) appears on 424 US grants and 471 published applications in this corpus.
Search patents in F01N- Granted patents
- 424
- Published applications
- 471
- Assignees
- 140
- Inventors
- 880
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 4 | 2 |
| 2003 | 1 | 5 |
| 2004 | 4 | 13 |
| 2005 | 6 | 9 |
| 2006 | 10 | 13 |
| 2007 | 6 | 15 |
| 2008 | 4 | 18 |
| 2009 | 13 | 14 |
| 2010 | 16 | 12 |
| 2011 | 8 | 21 |
| 2012 | 17 | 28 |
| 2013 | 18 | 23 |
| 2014 | 29 | 28 |
| 2015 | 24 | 27 |
| 2016 | 19 | 30 |
| 2017 | 28 | 33 |
| 2018 | 28 | 31 |
| 2019 | 45 | 31 |
| 2020 | 25 | 43 |
| 2021 | 36 | 18 |
| 2022 | 27 | 13 |
| 2023 | 12 | 17 |
| 2024 | 18 | 11 |
| 2025 | 12 | 9 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Low resistance exhaust system with correction module for regeneration control5 May 2026US 12,618,353 B1
- Method and system for detecting and quantifying regeneration events in a diesel particulate filter5 May 2026US 12,618,354 B2Intangles Lab Pvt. Ltd.
- Treatment device, treatment method, and exhaust gas treatment system5 May 2026US 12,620,297 B2Komatsu Ltd.
- Particulate filter7 Apr 2026US 12,594,515 B2BASF Mobile Emissions Catalysts LLC
- Systems and methods for filter regeneration with cylinder deactivation16 Dec 2025US 12,497,927 B2Cummins Inc.
- Controller for internal combustion engine, control method for internal combustion engine, and storage medium17 Sep 2026US 2026/0275894 A1Toyota Jidosha Kabushiki Kaisha
- Exhaust system state determination method and exhaust system state determination device3 Sep 2026US 2026/0258745 A1Nissan Motor Co., Ltd.
- Method and device for detecting pressure difference of particulate filter27 Aug 2026US 2026/0251084 A1
- Exhaust purification device13 Aug 2026US 2026/0235058 A1Tokyo Roki Co., Ltd.
- Controller for internal combustion engine25 Jun 2026US 2026/0176997 A1Toyota Jidosha Kabushiki Kaisha
Most cited
By later US patents
- Radio frequency process sensing, control, and diagnostics network and system267US 10,118,119 B2CTS Corporation · 2018
- Antenna system for soot detecting72US 5,497,099 AEngine Control Systems Ltd. · 1996
- Method for determining load on particulate filter for engine exhaust, including estimation of ash content65US 6,405,528 B1Ford Global Technologies, LLC · 2002
- Filter regenerating apparatus and method for an internal combustion engine57US 5,423,180 AMatsushita Electric Industrial Co., Ltd. · 1995
- System for particulate matter sensor signal processing53US 7,765,792 B2Honeywell International Inc. · 2010