Exhaust valve, exhaust valve assembly and exhaust valve system for two-stroke internal combustion engines, two-stroke internal combustion engine having same and method for cleaning an exhaust valve
US-12018627-B2 · Jun 25, 2024 · US
for engines with other than four-stroke cycle, e.g. with two-stroke cycle (F01L1/26, F01L1/28 take precedence)
for engines with other than four-stroke cycle, e.g. with two-stroke cycle (F01L1/26, F01L1/28 take precedence) · 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 | F01L1/38 |
| Official title | for engines with other than four-stroke cycle, e.g. with two-stroke cycle (F01L1/26, F01L1/28 take precedence) |
| Display label | for engines with other than four-stroke cycle, e.g. with two-stroke cycle (F01L1/26, F01L1/28 take precedence) |
| 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 | 7 |
| 2016 | 3 |
| 2017 | 3 |
| 2018 | 7 |
| 2019 | 9 |
| 2020 | 11 |
| 2021 | 8 |
| 2022 | 9 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Exhaust valve, exhaust valve assembly and exhaust valve system for two-stroke internal combustion engines, two-stroke internal combustion engine having same and method for cleaning an exhaust valve
US-11578679-B2 · Feb 14, 2023 · US
Exhaust valve, exhaust valve assembly and exhaust valve system for two-stroke internal combustion engines, two-stroke internal combustion engine having same and method for cleaning an exhaust valve
US-11560864-B2 · Jan 24, 2023 · US
Internal combustion engine system
US-11519305-B2 · Dec 6, 2022 · US
Valve train with cylinder deactivation and compression release
US-11512653-B2 · Nov 29, 2022 · US
Exhaust valve, exhaust valve assembly and exhaust valve system for two-stroke internal combustion engines, two-stroke internal combustion engine having same and method for cleaning an exhaust valve
US-2022316421-A1 · Oct 6, 2022 · US
Exhaust valve, exhaust valve assembly and exhaust valve system for two-stroke internal combustion engines, two-stroke internal combustion engine having same and method for cleaning an exhaust valve
US-2022316420-A1 · Oct 6, 2022 · US
Exhaust valve, exhaust valve assembly and exhaust valve system for two-stroke internal combustion engines, two-stroke internal combustion engine having same and method for cleaning an exhaust valve
US-2022316419-A1 · Oct 6, 2022 · US
Pivot valve for rotary internal combustion engine
US-11421584-B1 · Aug 23, 2022 · US
Exhaust valve, exhaust valve assembly and exhaust valve system for two-stroke internal combustion engines, two-stroke internal combustion engine having same and method for cleaning an exhaust valve
US-11396853-B2 · Jul 26, 2022 · US
Method for controlling a powertrain system during upshifting
US-11370443-B2 · Jun 28, 2022 · US
Internal combustion engine system
US-2022154604-A1 · May 19, 2022 · US
A method for controlling a powertrain system during upshifting
US-2021362721-A1 · Nov 25, 2021 · US
Valve train with cylinder deactivation and compression release
US-2021340921-A1 · Nov 4, 2021 · US
Valve train assembly
US-2021317760-A1 · Oct 14, 2021 · US
Rotary internal combustion engine
US-11143098-B1 · Oct 12, 2021 · US
Turbocharger for an internal combustion engine
US-11131242-B2 · Sep 28, 2021 · US
Valve train with cylinder deactivation and compression release
US-11092088-B2 · Aug 17, 2021 · US
Piston combinations for opposed-piston engines
US-11060403-B2 · Jul 13, 2021 · US
Turbocharger for an internal combustion engine
US-2021010420-A1 · Jan 14, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01L1/38?
- CPC F01L1/38 is the Cooperative Patent Classification code for “for engines with other than four-stroke cycle, e.g. with two-stroke cycle (F01L1/26, F01L1/28 take precedence).”
- How many patents are filed under CPC F01L1/38 (for engines with other than four-stroke cycle, e.g. with two-stroke cycle (F01L1/26, F01L1/28 take precedence))?
- Our database includes 63 publications tagged with this CPC code.
- Is patent activity under CPC F01L1/38 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).