F01N 2550/22
Monitoring or diagnosing the deterioration of exhaust systems: of electric heaters for
Official title: of electric heaters for exhaust systems or their power supply
F01N2550/22 (Monitoring or diagnosing the deterioration of exhaust systems: of electric heaters for) appears on 106 US grants and 97 published applications in this corpus.
Search patents in F01N- Granted patents
- 106
- Published applications
- 97
- Assignees
- 49
- Inventors
- 235
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 3 |
| 2010 | 0 | 3 |
| 2011 | 0 | 2 |
| 2012 | 3 | 4 |
| 2013 | 4 | 1 |
| 2014 | 4 | 4 |
| 2015 | 3 | 3 |
| 2016 | 2 | 0 |
| 2017 | 1 | 12 |
| 2018 | 1 | 5 |
| 2019 | 6 | 4 |
| 2020 | 7 | 14 |
| 2021 | 7 | 10 |
| 2022 | 17 | 11 |
| 2023 | 12 | 6 |
| 2024 | 13 | 8 |
| 2025 | 8 | 4 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods to assess state-of-health of an exhaust gas constituent capture device28 Jul 2026US 12,692,811 B2Cummins Inc.
- Multiple heater exhaust aftertreatment system architecture and methods of control thereof9 Jun 2026US 12,650,088 B2Cummins Inc.
- Electrically heated mixer assembly for an exhaust aftertreatment system11 Nov 2025US 12,467,396 B1Caterpillar Inc.
- Valve arrangement for split-flow close-coupled catalyst2 Sep 2025US 12,404,794 B2Cummins Emission Solutions Inc.
- Systems and methods for managing ammonia slip with a heater29 Jul 2025US 12,372,019 B2Cummins Inc.
- Multiple heater exhaust aftertreatment system architecture and methods of control thereof24 Sep 2026US 2026/0286875 A1Cummins Inc.
- In-vehicle temperature estimation device1 Jan 2026US 2026/0002461 A1Autonetworks Technologies, Ltd.
- Electrically heated mixer assembly for an exhaust aftertreatment system13 Nov 2025US 2025/0347240 A1Caterpillar Inc.
- Aftertreatment system heater controls3 Jul 2025US 2025/0215817 A1Cummins Inc.
- Systems and methods to assess state-of-health of an exhaust gas constituent capture device19 Jun 2025US 2025/0198321 A1Cummins Inc.
Most cited
By later US patents
- Exhaust emission control apparatus for internal combustion engine47US 5,224,335 AToyota Jidosha Kabushiki Kaisha · 1993
- Systems and methods for electrically heated exhaust catalyst diagnostics31US 10,301,991 B1Ford Global Technologies, LLC · 2019
- Method and assembly for operating an electrical heater of a catalytic converter system31US 5,694,770 AEMITEC Gesellschaft fuer Emissionstechnologie mbH · 1997
- Circuit and control method for electrically heating a catalyst29US 5,645,745 AChrysler Corporation · 1997
- Apparatus for controlling power supplied to an electrically heated catalyst attached to an exhaust gas passage of an internal combustion engine28US 5,746,053 AToyota Jidosha Kabushiki Kaisha · 1998