Handling of fuel vapour
US-12311752-B2 · May 27, 2025 · US
returning to the fuel tank
returning to the fuel tank · 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 | F02M33/08 |
| Official title | returning to the fuel tank |
| Display label | returning to the fuel tank |
| Total patents | 27 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 8 |
| 2018 | 6 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 2 |
| 2022 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Adjusting a fuel on-board a vehicle
US-11293386-B2 · Apr 5, 2022 · US
Handling of fuel vapour
US-2021402872-A1 · Dec 30, 2021 · US
Fuel system for a vehicle
US-11118530-B1 · Sep 14, 2021 · US
Adjusting a fuel on-board a vehicle
US-10697380-B2 · Jun 30, 2020 · US
Fuel tank arrangement for a dual fuel internal combustion engine
US-10343516-B2 · Jul 9, 2019 · US
Method for detecting a sticking tank vent valve
US-10166862-B2 · Jan 1, 2019 · US
A fuel tank arrangement for a dual fuel internal combustion engine
US-2018304740-A1 · Oct 25, 2018 · US
Adjusting a fuel on-board a vehicle
US-2018245524-A1 · Aug 30, 2018 · US
Method for detecting a sticking tank vent valve
US-2018208054-A1 · Jul 26, 2018 · US
Fuel system for bi-fuel vehicle and method of filling bi-fuel vehicle with LPG fuel using the same
US-10018154-B2 · Jul 10, 2018 · US
Adjusting a fuel on-board a vehicle
US-9957903-B2 · May 1, 2018 · US
Adjusting a fuel on-board a vehicle
US-2018066613-A1 · Mar 8, 2018 · US
Diesel low pressure/high pressure flow control system
US-9828931-B1 · Nov 28, 2017 · US
Adjusting a fuel on-board a vehicle
US-9816467-B2 · Nov 14, 2017 · US
Engine starting system with purge pump
US-9777683-B2 · Oct 3, 2017 · US
Fuel system
US-9752544-B2 · Sep 5, 2017 · US
Adjusting a fuel on-board a vehicle
US-2017234276-A1 · Aug 17, 2017 · US
Adjusting a fuel on-board a vehicle
US-2017234244-A1 · Aug 17, 2017 · US
Method for suctioning liquid fuel from a liquid trap in a fuel tank; and fuel system for a motor vehicle
US-9631586-B2 · Apr 25, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02M33/08?
- CPC F02M33/08 is the Cooperative Patent Classification code for “returning to the fuel tank.”
- How many patents are filed under CPC F02M33/08 (returning to the fuel tank)?
- Our database includes 27 publications tagged with this CPC code.
- Is patent activity under CPC F02M33/08 growing?
- Publication counts under this code: 1 in 2022 vs 1 in 2025 (latest complete years).