Piston and internal combustion engine
US-2026036073-A1 · Feb 5, 2026 · US
This page is not indexed by search engines while we improve data quality.
the skirt wall having cavities
the skirt wall having cavities · 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 | F02F3/027 |
| Official title | {the skirt wall having cavities} |
| Display label | the skirt wall having cavities |
| Total patents | 20 |
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 | 2 |
| 2016 | 2 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 5 |
| 2021 | 4 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Piston for assembly with a cylinder
US-12258922-B2 · Mar 25, 2025 · US
Piston for assembly with a cylinder
US-2024175407-A1 · May 30, 2024 · US
Steel piston with optimized design
US-11566581-B2 · Jan 31, 2023 · US
Piston
US-11067032-B2 · Jul 20, 2021 · US
Piston
US-2021189995-A1 · Jun 24, 2021 · US
Piston for internal combustion engine
US-10927787-B2 · Feb 23, 2021 · US
Piston for internal combustion engine
US-10890135-B2 · Jan 12, 2021 · US
Steel Piston With Optimized Design
US-2020378336-A1 · Dec 3, 2020 · US
Piston for internal combustion engine
US-2020263629-A1 · Aug 20, 2020 · US
Diesel piston with sharp-step profile
US-10634089-B2 · Apr 28, 2020 · US
Piston For Internal Combustion Engine
US-2020095952-A1 · Mar 26, 2020 · US
Piston for internal combustion engine
US-2020088128-A1 · Mar 19, 2020 · US
Diesel piston with sharp-step profile
US-2019178203-A1 · Jun 13, 2019 · US
Piston for engine
US-10018147-B2 · Jul 10, 2018 · US
Monobloc piston with a low friction skirt
US-9909526-B2 · Mar 6, 2018 · US
Oil retention in the bore/piston interfaces of ported cylinders in opposed-piston engines
US-9482153-B2 · Nov 1, 2016 · US
Piston for engine
US-2016312739-A1 · Oct 27, 2016 · US
Piston for internal combustion engine
US-9086030-B2 · Jul 21, 2015 · US
Piston for an engine
US-9086147-B2 · Jul 21, 2015 · US