F01N 3/18
Characterised by methods of operation
Official title: characterised by methods of operation; Control
F01N3/18 (Characterised by methods of operation) appears on 9,134 US grants and 9,677 published applications in this corpus.
Search patents in F01N- Granted patents
- 9,134
- Published applications
- 9,677
- Assignees
- 1,408
- Inventors
- 13,493
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 63 | 0 |
| 1977 | 29 | 0 |
| 1978 | 39 | 0 |
| 1979 | 43 | 0 |
| 1980 | 42 | 0 |
| 1981 | 31 | 0 |
| 1982 | 16 | 0 |
| 1983 | 16 | 0 |
| 1984 | 15 | 0 |
| 1985 | 9 | 0 |
| 1986 | 9 | 0 |
| 1987 | 8 | 0 |
| 1988 | 5 | 0 |
| 1989 | 8 | 0 |
| 1990 | 17 | 0 |
| 1991 | 20 | 0 |
| 1992 | 45 | 0 |
| 1993 | 76 | 0 |
| 1994 | 76 | 0 |
| 1995 | 124 | 0 |
| 1996 | 92 | 0 |
| 1997 | 86 | 0 |
| 1998 | 119 | 0 |
| 1999 | 104 | 0 |
| 2000 | 85 | 0 |
| 2001 | 103 | 28 |
| 2002 | 86 | 96 |
| 2003 | 82 | 144 |
| 2004 | 98 | 189 |
| 2005 | 125 | 154 |
| 2006 | 118 | 195 |
| 2007 | 94 | 250 |
| 2008 | 83 | 274 |
| 2009 | 129 | 372 |
| 2010 | 182 | 466 |
| 2011 | 199 | 469 |
| 2012 | 319 | 390 |
| 2013 | 410 | 502 |
| 2014 | 442 | 547 |
| 2015 | 535 | 687 |
| 2016 | 509 | 640 |
| 2017 | 602 | 623 |
| 2018 | 495 | 636 |
| 2019 | 648 | 571 |
| 2020 | 546 | 517 |
| 2021 | 508 | 437 |
| 2022 | 483 | 469 |
| 2023 | 399 | 348 |
| 2024 | 341 | 279 |
| 2025 | 300 | 226 |
| 2026 | 121 | 168 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Engine device6 Oct 2026US 12,753,713 B2Yanmar Holdings Co., Ltd.
- Desulfurization method29 Sep 2026US 12,747,685 B2Subaru Corporation
- Exhaust gas aftertreatment system with two SCR catalysts29 Sep 2026US 12,747,686 B1FEV Group GmbH
- Electrically heated exhaust gas purification catalyst22 Sep 2026US 12,741,271 B2Mitsui Kinzoku Company, Limited
- Electrically heatable honeycomb structure having corrugated layers of different cell density22 Sep 2026US 12,742,405 B2Vitesco Technologies GmbH
- System for treating an exhaust gas8 Oct 2026US 2026/0307052 A1Johnson Matthey Public Limited Company
- Pressurized systems and methods for providing a nebulized catalyst8 Oct 2026US 2026/0309066 A1Jake Vernon LLC
- Containerized ultra-low nox diesel engine generator set with roof-mounted selective catalytic reduction system8 Oct 2026US 2026/0309075 A1Industrial Service Solutions WC, Inc.
- An exhaust gas treatment system for treating an exhaust gas stream exiting a gasoline engine1 Oct 2026US 2026/0295528 A1
- Catalytic materials comprising fe-containing zeolitic material for the treatment of an exhaust gas1 Oct 2026US 2026/0295569 A1
Most cited
By later US patents
- Remote power recharge for electronic equipment421US 7,068,991 B22006
- Hybrid vehicles228US 6,554,088 B2Paice LLC · 2003
- Method and apparatus for reducing nitrogen oxides from internal combustion engine207US 5,272,871 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1993
- Exhaust gas control using a spark plug ionization signal198US 6,980,903 B2Visteon Global Technologies, Inc. · 2005
- Hybrid car and an operating method therefor181US 5,441,122 AMitsubishi Jidosha Kogyo Kabushiki Kaisha · 1995