F01N 2430/04
Influencing exhaust purification: by adding non-fuel substances to combustion air or fuel
Official title: by adding non-fuel substances to combustion air or fuel, e.g. additives
F01N2430/04 (Influencing exhaust purification: by adding non-fuel substances to combustion air or fuel) appears on 101 US grants and 100 published applications in this corpus.
Search patents in F01N- Granted patents
- 101
- Published applications
- 100
- Assignees
- 62
- Inventors
- 224
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 6 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 2 |
| 2003 | 2 | 7 |
| 2004 | 1 | 8 |
| 2005 | 5 | 10 |
| 2006 | 4 | 6 |
| 2007 | 2 | 9 |
| 2008 | 2 | 5 |
| 2009 | 8 | 3 |
| 2010 | 7 | 1 |
| 2011 | 4 | 3 |
| 2012 | 0 | 3 |
| 2013 | 0 | 2 |
| 2014 | 2 | 3 |
| 2015 | 0 | 1 |
| 2016 | 2 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 1 |
| 2019 | 3 | 10 |
| 2020 | 2 | 3 |
| 2021 | 3 | 2 |
| 2022 | 4 | 6 |
| 2023 | 5 | 5 |
| 2024 | 3 | 5 |
| 2025 | 2 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for reducing emissions from a hydrogen combustion engine2 Jun 2026US 12,644,403 B2Hyundai Motor Company
- Additive for cleaning SCR systems5 Aug 2025US 12,378,505 B2Tunap GmbH & Co. KG
- Purification system25 Mar 2025US 12,258,897 B2Isuzu Motors Limited
- Explosion safe electrolysis unit29 Oct 2024US 12,129,786 B2
- Internal combustion engine system14 May 2024US 11,982,217 B2Volvo Truck Corporation
- Method for reducing emissions from a hydrogen combustion engine16 Apr 2026US 2026/0104003 A1Hyundai Motor Company
- Engine power generation system control device2 Apr 2026US 2026/0092569 A1Hitachi, Ltd.
- Enhanced operation of hydrogen and ammonia engines11 Dec 2025US 2025/0376937 A1
- Additive for cleaning scr systems7 Nov 2024US 2024/0368504 A1Tunap GmbH & Co. KG
- Purification system19 Sep 2024US 2024/0309790 A1Isuzu Motors Limited
Most cited
By later US patents
- Variable oxygen/nitrogen enriched intake air system for internal combustion engine applications110US 5,649,517 AThe University of Chicago · 1997
- System for fueling and feeding chemicals to internal combustion engines for NO.sub.x reduction97US 5,809,774 AClean Diesel Technologies, Inc. · 1998
- Methods for reducing harmful emissions from a diesel engine61US 6,003,303 AClean Diesel Technologies, Inc. · 1999
- Reduction of nitrogen oxides emissions from diesel engines58US 5,535,708 APlatinum Plus, Inc. · 1996
- Method and apparatus for treating exhaust gas from vehicles58US 6,212,883 B1Moon-Ki Cho · 2001