Gas exchange valve for an internal combustion engine
US-11174763-B2 · Nov 16, 2021 · US
poppet valves
poppet valves · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B23P15/002 |
| Official title | {poppet valves} |
| Display label | poppet valves |
| Total patents | 73 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 12 |
| 2016 | 14 |
| 2017 | 12 |
| 2018 | 10 |
| 2019 | 4 |
| 2020 | 1 |
| 2021 | 7 |
| 2022 | 7 |
| 2023 | 5 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for Manufacturing Engine Poppet Valve
US-2021270154-A1 · Sep 2, 2021 · US
Method of Manufacturing Engine Valve Intermediate Product with Boss Portion
US-2021245309-A1 · Aug 12, 2021 · US
Hollow poppet valve and manufacturing method therefor
US-2021190212-A1 · Jun 24, 2021 · US
Poppet, assembly, and methods of assembling and using the same
US-2021187675-A1 · Jun 24, 2021 · US
Poppet valve
US-2021180479-A1 · Jun 17, 2021 · US
Welded check valve
US-2021148474-A1 · May 20, 2021 · US
Gas exchange valve for an internal combustion engine
US-2020362734-A1 · Nov 19, 2020 · US
Poppet valve and method for manufacturing same
US-10473002-B2 · Nov 12, 2019 · US
Composite sandwich panels for oilfield valve
US-10337627-B2 · Jul 2, 2019 · US
Highly-viscous substance dispensing method and highly-viscous substance dispensing apparatus
US-10252307-B2 · Apr 9, 2019 · US
Pressure-Limiting Valve
US-2019093782-A1 · Mar 28, 2019 · US
Automatic ring valve shutters for automatic ring valves and method for manufacturing said shutters
US-10145480-B2 · Dec 4, 2018 · US
Method for the ultrasonic measurement of a wall thickness in hollow valves
US-10139222-B2 · Nov 27, 2018 · US
Highly-viscous substance dispensing method and highly-viscous substance dispensing apparatus
US-2018264530-A1 · Sep 20, 2018 · US
Passive exhaust valve with dual torsion spring
US-9982793-B2 · May 29, 2018 · US
Passive exhaust valve with external torsion spring
US-9982794-B2 · May 29, 2018 · US
Method of making a valve stem seal with formable retainer tabs
US-9943935-B2 · Apr 17, 2018 · US
Diamond sintered sampling relief valve
US-2018045618-A1 · Feb 15, 2018 · US
Metering valve assembly and method of assembly thereof
US-2018045121-A1 · Feb 15, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B23P15/002?
- CPC B23P15/002 is the Cooperative Patent Classification code for “poppet valves.”
- How many patents are filed under CPC B23P15/002 (poppet valves)?
- Our database includes 73 publications tagged with this CPC code.
- Is patent activity under CPC B23P15/002 growing?
- Publication counts under this code: 5 in 2023 vs 1 in 2025 (latest complete years).