F01N 3/06
Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise
Official title: for extinguishing sparks
F01N3/06 (Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise) appears on 84 US grants and 29 published applications in this corpus.
Search patents in F01N- Granted patents
- 84
- Published applications
- 29
- Assignees
- 53
- Inventors
- 180
- Latest grant
- 20 Feb 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 8 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 1 |
| 2002 | 5 | 3 |
| 2003 | 2 | 3 |
| 2004 | 0 | 2 |
| 2005 | 3 | 1 |
| 2006 | 0 | 1 |
| 2007 | 2 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 1 | 2 |
| 2012 | 3 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 6 |
| 2015 | 2 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 2 | 2 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Exhaust system combustion for rapid catalyst heating20 Feb 2024US 11,905,900 B1Saudi Arabian Oil Company
- Compact slip-in spark arrestor30 May 2023US 11,661,873 B2
- System for a combined spark arrestor and muffler assembly18 Apr 2023US 11,629,621 B2Transportation IP Holdings, LLC
- Exhaust device equipped with spark arrester27 Jul 2021US 11,073,068 B2Honda Motor Co., Ltd.
- Engine and engine-driven working machine21 Jul 2020US 10,718,243 B2Koki Holdings Co., Ltd.
- Method and apparatus for cleaning exhaust gas7 Sep 2023US 2023/0277984 A1Nanomist Technologies Co., Ltd.
- Compact slip-in spark arrestor27 Apr 2023US 2023/0128285 A1
- System for a combined spark arrestor and muffler assembly30 Dec 2021US 2021/0404359 A1Transportation IP Holdings, LLC
- Exhaust device equipped with spark arrester19 Sep 2019US 2019/0284984 A1Honda Motor Co., Ltd.
- Engine and engine-driven working machine18 Jan 2018US 2018/0016956 A1Hitachi Koki Co., Ltd.
Most cited
By later US patents
- Combination spark arrestor and aspirating muffler129US 4,147,230 ANelson Industries, Inc. · 1979
- Engine exhaust gas purification catalyst and exhaust gas purifier84US 6,047,544 ANissan Motor Co., Ltd. · 2000
- Narrow profile power handle for line trimmer and the like83US 4,286,675 ABeaird-Poulan Division of Emerson Electric Co. · 1981
- Water and steam injection in cogeneration system78US 4,928,478 AGeneral Electric Company · 1990
- Spark arrester with spark filter55US 6,467,570 B1Arvin Technologies, Inc. · 2002