F01N 3/20
Specially adapted for catalytic conversion
Official title: specially adapted for catalytic conversion (F01N3/22 takes precedence)
F01N3/20 (Specially adapted for catalytic conversion) appears on 8,494 US grants and 9,355 published applications in this corpus.
Search patents in F01N- Granted patents
- 8,494
- Published applications
- 9,355
- Assignees
- 1,321
- Inventors
- 12,674
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 25 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 9 | 0 |
| 1981 | 11 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 8 | 0 |
| 1990 | 16 | 0 |
| 1991 | 17 | 0 |
| 1992 | 38 | 0 |
| 1993 | 65 | 0 |
| 1994 | 66 | 0 |
| 1995 | 102 | 0 |
| 1996 | 80 | 0 |
| 1997 | 76 | 0 |
| 1998 | 101 | 0 |
| 1999 | 95 | 0 |
| 2000 | 77 | 0 |
| 2001 | 95 | 27 |
| 2002 | 80 | 91 |
| 2003 | 79 | 135 |
| 2004 | 84 | 166 |
| 2005 | 110 | 138 |
| 2006 | 103 | 181 |
| 2007 | 84 | 233 |
| 2008 | 79 | 262 |
| 2009 | 119 | 356 |
| 2010 | 171 | 452 |
| 2011 | 186 | 461 |
| 2012 | 309 | 377 |
| 2013 | 401 | 495 |
| 2014 | 426 | 523 |
| 2015 | 513 | 664 |
| 2016 | 497 | 625 |
| 2017 | 587 | 605 |
| 2018 | 480 | 625 |
| 2019 | 633 | 560 |
| 2020 | 534 | 506 |
| 2021 | 491 | 418 |
| 2022 | 470 | 461 |
| 2023 | 393 | 343 |
| 2024 | 333 | 271 |
| 2025 | 287 | 217 |
| 2026 | 118 | 163 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01N 3/206Adding periodically or continuously substances to exhaust gases for promoting purification5,961
- F01N 3/2006Periodically heating or cooling catalytic reactors2,441
- F01N 3/2053By-passing catalytic reactors360
- F01N 3/2093Periodically blowing a gas through the converter61
- F01N 3/2086Activating the catalyst by light, photo-catalysts35
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