Value for an internal combustion engine and production method
US-2024240577-A1 · Jul 18, 2024 · US
by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve · 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 | F01L3/14 |
| Official title | by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve |
| Display label | by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve |
| Total patents | 63 |
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 | 6 |
| 2016 | 11 |
| 2017 | 11 |
| 2018 | 7 |
| 2019 | 5 |
| 2020 | 4 |
| 2021 | 8 |
| 2022 | 4 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hydrogen combustion engine and passenger car and commercial vehicle
US-2024229687-A1 · Jul 11, 2024 · US
Internal combustion engine with at least one hollow-head valve
US-11828207-B2 · Nov 28, 2023 · US
Poppet valve
US-11767774-B2 · Sep 26, 2023 · US
Method for manufacturing engine poppet valve
US-11536167-B2 · Dec 27, 2022 · US
Hollow poppet valve and manufacturing method therefor
US-11384842-B2 · Jul 12, 2022 · US
Hollow exhaust poppet valve
US-11300018-B2 · Apr 12, 2022 · US
Method for producing a hollow valve
US-11247284-B2 · Feb 15, 2022 · US
Valve seat ring of a gas exchange valve and gas exchange valve
US-11193402-B2 · Dec 7, 2021 · US
Cylinder head and engine
US-11143063-B2 · Oct 12, 2021 · US
Cylinder head and engine
US-2021285345-A1 · Sep 16, 2021 · US
Method for Manufacturing Engine Poppet Valve
US-2021270154-A1 · Sep 2, 2021 · US
Hollow poppet valve and manufacturing method therefor
US-2021190212-A1 · Jun 24, 2021 · US
Poppet valve
US-2021180479-A1 · Jun 17, 2021 · US
Valve seat ring of a gas exchange valve and gas exchange valve
US-2021148257-A1 · May 20, 2021 · US
Hollow Exhaust Poppet Valve
US-2021003044-A1 · Jan 7, 2021 · US
Poppet valve for an internal combustion engine
US-10760455-B2 · Sep 1, 2020 · US
Internal combustion engine with at least one hollow-head valve
US-2020232354-A1 · Jul 23, 2020 · US
Method for filling with metallic sodium
US-10710153-B2 · Jul 14, 2020 · US
Sliding mechanism
US-10590812-B2 · Mar 17, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01L3/14?
- CPC F01L3/14 is the Cooperative Patent Classification code for “by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve.”
- How many patents are filed under CPC F01L3/14 (by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve)?
- Our database includes 63 publications tagged with this CPC code.
- Is patent activity under CPC F01L3/14 growing?
- Publication counts under this code: 2 in 2024 vs 3 in 2025 (latest complete years).