F02B 43/00
Engines characterised by operating on gaseous fuels
Official title: Engines characterised by operating on gaseous fuels; Plants including such engines (engines characterised by the gas-air charge being ignited by compression ignition of an additional fuel F02B7/06; engines convertible from gas to other fuel consumption F02B69/04)
F02B43/00 (Engines characterised by operating on gaseous fuels) appears on 1,387 US grants and 1,211 published applications in this corpus.
Search patents in F02B- Granted patents
- 1,387
- Published applications
- 1,211
- Assignees
- 661
- Inventors
- 2,566
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 25 | 0 |
| 1978 | 17 | 0 |
| 1979 | 10 | 0 |
| 1980 | 15 | 0 |
| 1981 | 11 | 0 |
| 1982 | 20 | 0 |
| 1983 | 20 | 0 |
| 1984 | 19 | 0 |
| 1985 | 28 | 0 |
| 1986 | 13 | 0 |
| 1987 | 12 | 0 |
| 1988 | 12 | 0 |
| 1989 | 17 | 0 |
| 1990 | 10 | 0 |
| 1991 | 23 | 0 |
| 1992 | 23 | 0 |
| 1993 | 23 | 0 |
| 1994 | 29 | 0 |
| 1995 | 33 | 0 |
| 1996 | 20 | 0 |
| 1997 | 16 | 0 |
| 1998 | 29 | 0 |
| 1999 | 25 | 0 |
| 2000 | 23 | 0 |
| 2001 | 32 | 3 |
| 2002 | 14 | 35 |
| 2003 | 30 | 43 |
| 2004 | 30 | 43 |
| 2005 | 28 | 24 |
| 2006 | 22 | 28 |
| 2007 | 24 | 20 |
| 2008 | 13 | 25 |
| 2009 | 11 | 38 |
| 2010 | 20 | 47 |
| 2011 | 21 | 55 |
| 2012 | 33 | 52 |
| 2013 | 39 | 67 |
| 2014 | 35 | 79 |
| 2015 | 52 | 71 |
| 2016 | 48 | 88 |
| 2017 | 51 | 73 |
| 2018 | 61 | 68 |
| 2019 | 63 | 59 |
| 2020 | 54 | 45 |
| 2021 | 44 | 32 |
| 2022 | 32 | 41 |
| 2023 | 44 | 56 |
| 2024 | 38 | 38 |
| 2025 | 30 | 42 |
| 2026 | 27 | 39 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hybrid hydrogen fuel cell combustor power system6 Oct 2026US 12,755,989 B2Caterpillar Inc.
- Varied intake valve operation for improved transient response in gaseous fuel engine22 Sep 2026US 12,742,427 B1Caterpillar Inc.
- Blow-by gas processing apparatus, internal combustion engine, and supercharger18 Aug 2026US 12,710,003 B2IHI Corporation
- Fuel agnostic compression ignition engine18 Aug 2026US 12,710,015 B2Climate Energy Investments, LLC
- Pre-chamber combustion systems and methods11 Aug 2026US 12,704,088 B2M2X Energy Inc.
- High pressure gas compresor environmental recovery system8 Oct 2026US 2026/0309137 A1Flowco MasterCo LLC
- Varied intake valve operation for improved transient response in gaseous fuel engine24 Sep 2026US 2026/0286908 A1Caterpillar Inc.
- Lubricating fluid for internal combustion engines fueled with alternative combustion fuels having high auto-ignition temperatures17 Sep 2026US 2026/0275226 A1Afton Chemical Corporation
- Ammonia pre-chamber internal combustion engine17 Sep 2026US 2026/0275900 A1Regents of the University of Minnesota
- Spark ignition systems for opposed piston engines and related methods17 Sep 2026US 2026/0275901 A1Enginuity Power Systems, Inc.
Most cited
By later US patents
- Conversion of coal to electricity289US 4,549,396 AMobil Oil Corporation · 1985
- System for fueling electric powered hydraulic fracturing equipment with multiple fuel sources255US 10,020,711 B2U.S. Well Services, LLC · 2018
- Bi-fuel control system and retrofit assembly for diesel engines231US 6,543,395 B2Gas Technologies LLC · 2003
- Method and apparatus for operation of combustion engines205US 6,155,212 A2000
- System comprising duel-fuel and after treatment for heavy-heavy duty diesel (HHDD) engines180US 10,287,943 B1Clean Power Technologies, LLC · 2019