Engine device
US-2025290456-A1 · Sep 18, 2025 · US
Heavy or light fuel oils; Fuels characterised by their impurities such as sulfur content or differences in grade, e.g. for ships
Heavy or light fuel oils; Fuels characterised by their impurities such as sulfur content or differences in grade, e.g. for ships · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F02D19/0657 |
| Official title | {Heavy or light fuel oils; Fuels characterised by their impurities such as sulfur content or differences in grade, e.g. for ships} |
| Display label | Heavy or light fuel oils; Fuels characterised by their impurities such as sulfur content or differences in grade, e.g. for ships |
| Total patents | 57 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 7 |
| 2021 | 5 |
| 2022 | 8 |
| 2023 | 7 |
| 2024 | 3 |
| 2025 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Engine device
US-2025290465-A1 · Sep 18, 2025 · US
Ammonia mixed combustion engine
US-2025290457-A1 · Sep 18, 2025 · US
Dual fuel engine system
US-2025163847-A1 · May 22, 2025 · US
Dual fuel lockout switch for generator engine
US-2025154911-A1 · May 15, 2025 · US
Dual fuel engine system having fuel-actuated unit pumps and method
US-12234782-B1 · Feb 25, 2025 · US
Engine Apparatus
US-2025035055-A1 · Jan 30, 2025 · US
Dual fuel lockout switch for generator engine
US-2024183319-A1 · Jun 6, 2024 · US
Dual fuel lockout switch for generator engine
US-11905895-B2 · Feb 20, 2024 · US
Heating value estimation
US-11885276-B2 · Jan 30, 2024 · US
Apparatus for reducing greenhouse gas emission in vessel and vessel including the same
US-11852062-B2 · Dec 26, 2023 · US
Dual fuel generator with remote regulator
US-11840970-B2 · Dec 12, 2023 · US
Apparatus for reducing greenhouse gas emission in vessel and vessel including the same
US-2023383678-A1 · Nov 30, 2023 · US
Engine
US-11767798-B2 · Sep 26, 2023 · US
Dual fuel lockout switch for generator engine
US-2023235707-A1 · Jul 27, 2023 · US
Engine
US-2023072707-A1 · Mar 9, 2023 · US
Off-board fuel regulator for generator engine
US-2023023142-A1 · Jan 26, 2023 · US
Off-board fuel regulator for generator engine
US-11530654-B2 · Dec 20, 2022 · US
Engine
US-11525411-B2 · Dec 13, 2022 · US
Off-board fuel regulator for generator engine
US-11492985-B2 · Nov 8, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02D19/0657?
- CPC F02D19/0657 is the Cooperative Patent Classification code for “Heavy or light fuel oils; Fuels characterised by their impurities such as sulfur content or differences in grade, e.g. for ships.”
- How many patents are filed under CPC F02D19/0657 (Heavy or light fuel oils; Fuels characterised by their impurities such as sulfur content or differences in grade, e.g. for ships)?
- Our database includes 57 publications tagged with this CPC code.
- Is patent activity under CPC F02D19/0657 growing?
- Publication counts under this code: 3 in 2024 vs 7 in 2025 (latest complete years).