Internal combustion engine
US-2026055722-A1 · Feb 26, 2026 · US
for heating ({F02M31/005 takes precedence;} for purifying liquid fuel F02M37/30)
for heating ({F02M31/005 takes precedence;} for purifying liquid fuel F02M37/30) · 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 | F02M31/02 |
| Official title | for heating ({F02M31/005 takes precedence;} for purifying liquid fuel F02M37/30) |
| Display label | for heating ({F02M31/005 takes precedence;} for purifying liquid fuel F02M37/30) |
| Total patents | 48 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 5 |
| 2017 | 5 |
| 2018 | 8 |
| 2019 | 5 |
| 2020 | 3 |
| 2021 | 6 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 2 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Systems and method for vehicle thermal management
US-2026049567-A1 · Feb 19, 2026 · US
Systems and methods for actively managing pilot fuel storage tanks
US-12421908-B1 · Sep 23, 2025 · US
Fuel supply device and engine system
US-2025283436-A1 · Sep 11, 2025 · US
Fuel supply device for gas fuel
US-12173674-B1 · Dec 24, 2024 · US
Starting engine with generator to idle speed or higher without fueling
US-11970988-B2 · Apr 30, 2024 · US
Method and system for radiator fan operation for charge air cooler ice elimination
US-11821392-B2 · Nov 21, 2023 · US
Separating a fuel on-board a vehicle
US-11719200-B2 · Aug 8, 2023 · US
Method and system for radiator fan operation for charge air cooler ice elimination
US-2023151784-A1 · May 18, 2023 · US
Engine air intake device
US-11371474-B2 · Jun 28, 2022 · US
Vehicle system with fuel separation system and method of using same
US-11339754-B1 · May 24, 2022 · US
Vaporized-fuel treating apparatus
US-11203992-B2 · Dec 21, 2021 · US
Starting engine with generator to idle speed or higher without fueling
US-2021310427-A1 · Oct 7, 2021 · US
Engine air intake device
US-2021254585-A1 · Aug 19, 2021 · US
Separating a fuel on-board a vehicle
US-2021172407-A1 · Jun 10, 2021 · US
Separating a fuel on-board a vehicle
US-10927799-B2 · Feb 23, 2021 · US
Fuel heating
US-10920707-B2 · Feb 16, 2021 · US
Integrated natural gas flow regulation system including fuel temperature homogenization for improved engine performance and reduced emissions
US-10859009-B2 · Dec 8, 2020 · US
System and method for starting an engine
US-10550784-B2 · Feb 4, 2020 · US
Vaporized-fuel treating apparatus
US-2020018247-A1 · Jan 16, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02M31/02?
- CPC F02M31/02 is the Cooperative Patent Classification code for “for heating ({F02M31/005 takes precedence;} for purifying liquid fuel F02M37/30).”
- How many patents are filed under CPC F02M31/02 (for heating ({F02M31/005 takes precedence;} for purifying liquid fuel F02M37/30))?
- Our database includes 48 publications tagged with this CPC code.
- Is patent activity under CPC F02M31/02 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).