F01N 3/0821
Combined with particulate filter
Official title: {combined with particulate filter}
F01N3/0821 (Combined with particulate filter) appears on 473 US grants and 577 published applications in this corpus.
Search patents in F01N- Granted patents
- 473
- Published applications
- 577
- Assignees
- 162
- Inventors
- 1,032
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 7 | 6 |
| 2002 | 4 | 24 |
| 2003 | 12 | 31 |
| 2004 | 25 | 41 |
| 2005 | 28 | 49 |
| 2006 | 31 | 48 |
| 2007 | 28 | 41 |
| 2008 | 17 | 64 |
| 2009 | 25 | 47 |
| 2010 | 36 | 27 |
| 2011 | 34 | 26 |
| 2012 | 27 | 20 |
| 2013 | 24 | 16 |
| 2014 | 20 | 14 |
| 2015 | 18 | 18 |
| 2016 | 17 | 17 |
| 2017 | 17 | 15 |
| 2018 | 14 | 18 |
| 2019 | 11 | 16 |
| 2020 | 11 | 17 |
| 2021 | 16 | 4 |
| 2022 | 9 | 7 |
| 2023 | 10 | 2 |
| 2024 | 9 | 8 |
| 2025 | 2 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Post-combustion engine exhaust gases absorber18 Aug 2026US 12,710,005 B2
- Emission treatment catalysts, systems and methods26 May 2026US 12,636,613 B2BASF Mobile Emissions Catalysts LLC
- Systems and methods for measuring exhaust gas species and SCR catalyst NOx storage for SCR-related controls and diagnostics8 Jul 2025US 12,352,197 B2Cummins Inc.
- Catalytic converter of vehicle15 Apr 2025US 12,276,221 B2Faurecia Korea, Ltd.
- Particulate filter24 Dec 2024US 12,173,634 B2Cataler Corporation
- Systems and methods for measuring exhaust gas species and catalyst nox storage for catalyst-related controls and diagnostics25 Sep 2025US 2025/0297564 A1Cummins Inc.
- Post-Combustion Engine Exhaust Gases Absorber28 Nov 2024US 2024/0392712 A1
- Emission treatment catalysts, systems and methods19 Sep 2024US 2024/0307822 A1BASF SE
- Particulate filter22 Aug 2024US 2024/0280038 A1Cataler Corporation
- Reduction of tailpipe emissions from gasoline internal combustion engines with a combination of sorbents30 May 2024US 2024/0175382 A1Aramco Overseas Company B.V.
Most cited
By later US patents
- Device for removal of contaminants from fluid streams235US 5,750,026 ACorning Incorporated · 1998
- Method for purifying exhaust gas of a diesel engine146US 5,746,989 AToyota Jidosha Kabushiki Kaisha · 1998
- System and methods for improved emission control of internal combustion engines using pulsed fuel flow93US 7,082,753 B2Catalytica Energy Systems, Inc. · 2006
- Device for purifying the exhaust gas of a diesel engine85US 5,711,149 AToyota Jidosha Kabushiki Kaisha · 1998
- NOx aftertreatment system and method for internal combustion engines83US 6,732,507 B1Southwest Research Institute · 2004