F02D 41/025
By changing the composition of the exhaust gas
Official title: {by changing the composition of the exhaust gas, e.g. for exothermic reaction on exhaust gas treating apparatus}
F02D41/025 (By changing the composition of the exhaust gas) appears on 418 US grants and 423 published applications in this corpus.
Search patents in F02D- Granted patents
- 418
- Published applications
- 423
- Assignees
- 102
- Inventors
- 934
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 1 | 0 |
| 2001 | 14 | 2 |
| 2002 | 2 | 10 |
| 2003 | 9 | 7 |
| 2004 | 12 | 14 |
| 2005 | 5 | 12 |
| 2006 | 10 | 9 |
| 2007 | 11 | 15 |
| 2008 | 7 | 15 |
| 2009 | 4 | 19 |
| 2010 | 10 | 25 |
| 2011 | 18 | 22 |
| 2012 | 25 | 14 |
| 2013 | 13 | 24 |
| 2014 | 22 | 13 |
| 2015 | 15 | 30 |
| 2016 | 25 | 14 |
| 2017 | 19 | 21 |
| 2018 | 14 | 30 |
| 2019 | 37 | 30 |
| 2020 | 30 | 31 |
| 2021 | 34 | 13 |
| 2022 | 19 | 22 |
| 2023 | 22 | 12 |
| 2024 | 14 | 9 |
| 2025 | 6 | 4 |
| 2026 | 1 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Method for purifying exhaust gas of a diesel engine146US 5,746,989 AToyota Jidosha Kabushiki Kaisha · 1998
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