F02M 27/04
Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means
Official title: by electric means, {ionisation, polarisation} or magnetism
F02M27/04 (Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means) appears on 490 US grants and 433 published applications in this corpus.
Search patents in F02M- Granted patents
- 490
- Published applications
- 433
- Assignees
- 237
- Inventors
- 848
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 7 | 0 |
| 1978 | 7 | 0 |
| 1979 | 5 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 8 | 0 |
| 1983 | 6 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 8 | 0 |
| 1992 | 9 | 0 |
| 1993 | 5 | 0 |
| 1994 | 12 | 0 |
| 1995 | 4 | 0 |
| 1996 | 9 | 0 |
| 1997 | 13 | 0 |
| 1998 | 8 | 0 |
| 1999 | 14 | 0 |
| 2000 | 10 | 0 |
| 2001 | 17 | 3 |
| 2002 | 11 | 11 |
| 2003 | 10 | 23 |
| 2004 | 17 | 17 |
| 2005 | 12 | 22 |
| 2006 | 12 | 20 |
| 2007 | 6 | 21 |
| 2008 | 14 | 21 |
| 2009 | 14 | 30 |
| 2010 | 9 | 25 |
| 2011 | 9 | 25 |
| 2012 | 13 | 20 |
| 2013 | 21 | 13 |
| 2014 | 19 | 39 |
| 2015 | 22 | 18 |
| 2016 | 21 | 20 |
| 2017 | 14 | 24 |
| 2018 | 12 | 18 |
| 2019 | 16 | 5 |
| 2020 | 11 | 14 |
| 2021 | 11 | 15 |
| 2022 | 10 | 13 |
| 2023 | 10 | 5 |
| 2024 | 9 | 2 |
| 2025 | 3 | 7 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydrogen generator for internal combusion engines16 Jun 2026US 12,655,818 B2MöbiVolt Defense LLC
- Fuel-reforming device and fuel-reforming method21 Oct 2025US 12,447,458 B2National University Corporation Tokai National Higher Education and Research System
- Cold start catalyst light-off1 Apr 2025US 12,264,633 B1Fca US LLC
- Fuel conditioning system25 Feb 2025US 12,234,793 B1
- System for controlling production of ozone for an internal combustion engine3 Dec 2024US 12,158,125 B1
- Carbonous Gas Conversion System9 Jul 2026US 2026/0193801 A1
- Emission reduction19 Feb 2026US 2026/0049587 A1
- Magnetic device for controlling fluid flow in a well2 Oct 2025US 2025/0305386 A1Petroleo Brasileiro S.A. - Petrobras
- Method and system for direct hydrogen fuel injection of combustion engine2 Oct 2025US 2025/0305442 A1Cosmic Energy Power Inc.
- Cold start catalyst light-off3 Apr 2025US 2025/0109718 A1Fca US LLC
Most cited
By later US patents
- Method and apparatus for operation of combustion engines205US 6,155,212 A2000
- Method and apparatus to increase combustion efficiency and to reduce exhaust gas pollutants from combustion of a fuel158US 6,851,413 B1Ronnell Company, Inc. · 2005
- Electrohydrodynamic (EHD) control of fuel injection in gas turbines137US 4,439,980 AThe United States of America as represented by the Secretary of the Navy · 1984
- Energy conversion system106US 6,756,140 B12004
- Air ionization system for internal combustion engines93US 5,010,869 AZenion Industries, Inc. · 1991