F01N 9/00
Electrical control of exhaust gas treating apparatus
Official title: Electrical control of exhaust gas treating apparatus (monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N11/00; conjoint electrical control of two or more combustion engine functions F02D43/00)
F01N9/00 (Electrical control of exhaust gas treating apparatus) appears on 3,743 US grants and 3,961 published applications in this corpus.
Search patents in F01N- Granted patents
- 3,743
- Published applications
- 3,961
- Assignees
- 621
- Inventors
- 6,206
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 12 | 0 |
| 1985 | 13 | 0 |
| 1986 | 14 | 0 |
| 1987 | 9 | 0 |
| 1988 | 3 | 0 |
| 1989 | 14 | 0 |
| 1990 | 9 | 0 |
| 1991 | 11 | 0 |
| 1992 | 19 | 0 |
| 1993 | 24 | 0 |
| 1994 | 23 | 0 |
| 1995 | 31 | 0 |
| 1996 | 27 | 0 |
| 1997 | 25 | 0 |
| 1998 | 39 | 0 |
| 1999 | 26 | 0 |
| 2000 | 14 | 0 |
| 2001 | 19 | 11 |
| 2002 | 24 | 25 |
| 2003 | 17 | 50 |
| 2004 | 30 | 65 |
| 2005 | 49 | 92 |
| 2006 | 64 | 86 |
| 2007 | 62 | 126 |
| 2008 | 40 | 139 |
| 2009 | 76 | 160 |
| 2010 | 74 | 189 |
| 2011 | 110 | 184 |
| 2012 | 161 | 166 |
| 2013 | 165 | 207 |
| 2014 | 183 | 169 |
| 2015 | 199 | 216 |
| 2016 | 163 | 209 |
| 2017 | 207 | 262 |
| 2018 | 208 | 285 |
| 2019 | 288 | 252 |
| 2020 | 261 | 296 |
| 2021 | 276 | 193 |
| 2022 | 219 | 181 |
| 2023 | 191 | 142 |
| 2024 | 154 | 102 |
| 2025 | 124 | 98 |
| 2026 | 42 | 56 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Desulfurization method29 Sep 2026US 12,747,685 B2Subaru Corporation
- Apparatus and method for lambda control of spark-ignition engines, and motor vehicle29 Sep 2026US 12,747,711 B2Schaeffler Technologies AG & Co. KG
- Emissions management for diesel series hybrid powertrains25 Aug 2026US 12,715,426 B2Cummins Inc.
- Work vehicle and aftertreatment system therefor25 Aug 2026US 12,716,375 B2Deere & Company
- Systems and methods for reducing emissions with smart alternator18 Aug 2026US 12,709,274 B2Cummins Inc.
- Systems and methods for controlling tailpipe exhaust emissions1 Oct 2026US 2026/0298125 A1Cummins Inc.
- Exhaust monitoring apparatus and exhaust monitoring method27 Aug 2026US 2026/0251083 A1Toyota Jidosha Kabushiki Kaisha
- Method and device for detecting pressure difference of particulate filter27 Aug 2026US 2026/0251084 A1
- Exhaust gas purification device, exhaust gas purification method, and control device20 Aug 2026US 2026/0243204 A1Komatsu Ltd.
- Aftertreatment system nox and ammonia control strategy13 Aug 2026US 2026/0235059 A1Cummins Inc.
Most cited
By later US patents
- Radio frequency process sensing, control, and diagnostics network and system267US 10,118,119 B2CTS Corporation · 2018
- Apparatus and method for internal combustion engine control173US 5,657,625 AMitsubishi Jidosha Kogyo Kabushiki Kaisha · 1997
- Combustion exhaust purification system and method146US 5,522,218 ACaterpillar Inc. · 1996
- 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