F01N 2370/40
Activated carbon or charcoal
F01N2370/40 (Activated carbon or charcoal) appears on 29 US grants and 6 published applications in this corpus.
Search patents in F01N- Granted patents
- 29
- Published applications
- 6
- Assignees
- 11
- Inventors
- 46
- Latest grant
- 18 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 2 |
| 2021 | 0 | 1 |
| 2022 | 2 | 1 |
| 2023 | 1 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Active hydrocarbon trap for reduction of emissions from internal combustion engines using an electrically-heated catalyst18 Feb 2025US 12,228,056 B1Saudi Arabian Oil Company
- System and method for filtering exhaust gases of a vehicle3 Sep 2024US 12,078,091 B2
- Carbon dioxide reduction filter18 Apr 2023US 11,628,396 B2
- CO2 recovery system25 Oct 2022US 11,480,084 B2Toyota Jidosha Kabushiki Kaisha
- Vehicle18 Jan 2022US 11,225,898 B2Toyota Jidosha Kabushiki Kaisha
- System and method for filtering exhaust gases of a vehicle10 Nov 2022US 2022/0356824 A1
- Carbon dioxide reduction filter13 May 2021US 2021/0138395 A1
- Co2 recovery system17 Dec 2020US 2020/0391575 A1Toyota Jidosha Kabushiki Kaisha
- Vehicle10 Dec 2020US 2020/0386142 A1Toyota Jidosha Kabushiki Kaisha
- Filter for vehicle exhaust system26 May 2011US 2011/0120101 A1
Most cited
By later US patents
- Device for removal of contaminants from fluid streams235US 5,750,026 ACorning Incorporated · 1998
- Process for removing sulfur oxides and nitrogen oxides from flue gases using halogen-impregnated actuated carbon with simultaneous injection of ammonia95US 3,961,020 AHitachi, Ltd. · 1976
- Exhaust gas purifying apparatus for automobile84US 4,985,210 A501 Toyota Jidosha Kabushiki Kaisha · 1991
- Exhaust gas purification system of internal combustion engine52US 5,946,906 AHonda Giken Kogyo Kabushiki Kaisha · 1999
- High temperature gas filtering device51US 4,149,862 A1979