F01N 2550/00
Monitoring or diagnosing the deterioration of exhaust systems
F01N2550/00 (Monitoring or diagnosing the deterioration of exhaust systems) appears on 2,488 US grants and 2,238 published applications in this corpus.
Search patents in F01N- Granted patents
- 2,488
- Published applications
- 2,238
- Assignees
- 386
- Inventors
- 4,027
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 21 | 0 |
| 1993 | 29 | 0 |
| 1994 | 43 | 0 |
| 1995 | 58 | 0 |
| 1996 | 35 | 0 |
| 1997 | 33 | 0 |
| 1998 | 70 | 0 |
| 1999 | 62 | 0 |
| 2000 | 40 | 0 |
| 2001 | 43 | 19 |
| 2002 | 60 | 51 |
| 2003 | 61 | 65 |
| 2004 | 50 | 72 |
| 2005 | 49 | 49 |
| 2006 | 62 | 52 |
| 2007 | 34 | 68 |
| 2008 | 18 | 71 |
| 2009 | 43 | 97 |
| 2010 | 61 | 87 |
| 2011 | 59 | 90 |
| 2012 | 102 | 102 |
| 2013 | 74 | 103 |
| 2014 | 116 | 113 |
| 2015 | 115 | 138 |
| 2016 | 108 | 153 |
| 2017 | 141 | 154 |
| 2018 | 119 | 122 |
| 2019 | 155 | 125 |
| 2020 | 104 | 133 |
| 2021 | 122 | 80 |
| 2022 | 105 | 73 |
| 2023 | 71 | 81 |
| 2024 | 95 | 72 |
| 2025 | 70 | 42 |
| 2026 | 24 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01N 2550/02Catalytic activity of catalytic convertersIndexing code1,174
- F01N 2550/04Filtering activity of particulate filtersIndexing code424
- F01N 2550/05Systems for adding substances into exhaustIndexing code371
- F01N 2550/03Monitoring or diagnosing the deterioration of exhaust systems: of sorbing activity ofIndexing code299
- F01N 2550/14Systems for adding secondary air into exhaustIndexing code156
- F01N 2550/22Monitoring or diagnosing the deterioration of exhaust systems: of electric heaters forIndexing code106
- F01N 2550/06Monitoring or diagnosing the deterioration of exhaust systems: by-pass systemsIndexing code62
- F01N 2550/24Determining the presence or absence of an exhaust treating deviceIndexing code61
All 9 subgroupsShow fewer
Recent patents
- Apparatus for diagnosing a post-processing system6 Oct 2026US 12,753,715 B2AVL Software and Functions GmbH
- Estimation method for determining the oxygen storage capacity of a catalytic converter22 Sep 2026US 12,742,408 B2Ferrari S.P. A.
- System and method for controlling a cold light off catalyst8 Sep 2026US 12,729,639 B2Fca US LLC
- Diesel exhaust fluid sensor simulator device1 Sep 2026US 12,723,533 B1
- Systems and methods to assess state-of-health of an exhaust gas constituent capture device28 Jul 2026US 12,692,811 B2Cummins Inc.
- Ultra-low nox diesel engine generator with selective catalytic reduction engineered exhaust system and method1 Oct 2026US 2026/0298124 A1Industrial Service Solutions WC, Inc.
- Multiple heater exhaust aftertreatment system architecture and methods of control thereof24 Sep 2026US 2026/0286875 A1Cummins Inc.
- System and method for controlled heat exchanger swapping17 Sep 2026US 2026/0275893 A1Innio Waukesha Gas Engines Inc.
- Controller for internal combustion engine, control method for internal combustion engine, and storage medium17 Sep 2026US 2026/0275894 A1Toyota Jidosha Kabushiki Kaisha
- System and method for controlling a cold light off catalyst3 Sep 2026US 2026/0258742 A1Fca US LLC
Most cited
By later US patents
- Radio frequency process sensing, control, and diagnostics network and system267US 10,118,119 B2CTS Corporation · 2018
- Reducing no.sub.x emissions from an engine by temperature-controlled urea injection for selective catalytic reduction171US 6,063,350 AClean Diesel Technologies, Inc. · 2000
- Method for controlling the level of oxygen stored by a catalyst within a catalytic converter152US 5,842,340 AMotorola, Inc. · 1998
- Exhaust gas purification system for an internal combustion engine133US 5,201,802 AToyota Jidosha Kabushiki Kaisha · 1993
- Exhaust purification device of internal combustion engine131US 5,437,153 AToyota Jidosha Kabushiki Kaisha · 1995