Fan unit and outdoor unit
US-2026016022-A1 · Jan 15, 2026 · US
with roughened surfaces
with roughened surfaces · 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 | F05D2240/31 |
| Official title | with roughened surfaces |
| Display label | with roughened surfaces |
| Total patents | 47 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 6 |
| 2017 | 4 |
| 2018 | 5 |
| 2019 | 7 |
| 2020 | 3 |
| 2021 | 5 |
| 2022 | 6 |
| 2024 | 3 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Suction side micro-riblet patches for a turbine airfoil
US-12428963-B1 · Sep 30, 2025 · US
Axial fan
US-2025243880-A1 · Jul 31, 2025 · US
Blower fan
US-12297840-B2 · May 13, 2025 · US
Method for producing steam turbine member
US-12031454-B2 · Jul 9, 2024 · US
Turbine engine with an airfoil having a set of dimples
US-11933193-B2 · Mar 19, 2024 · US
Blower fan
US-2024084814-A1 · Mar 14, 2024 · US
Impeller design and manufacturing method with pentagonal channel geometry
US-11441572-B2 · Sep 13, 2022 · US
Turbine engine with an airfoil having a set of dimples
US-2022220854-A1 · Jul 14, 2022 · US
Rotor disk and rotor blade for a gas turbine compressor or turbine stage of an aeroengine
US-2022195877-A1 · Jun 23, 2022 · US
Method for producing steam turbine member
US-2022178264-A1 · Jun 9, 2022 · US
Fan blades with abrasive tips
US-11333169-B2 · May 17, 2022 · US
Impeller design and manufacturing method with pentagonal channel geometry
US-2022056921-A1 · Feb 24, 2022 · US
System and method to apply multiple thermal treatments to workpiece and related turbomachine components
US-11199101-B2 · Dec 14, 2021 · US
Turbine engine airfoil with a modified leading edge
US-11156099-B2 · Oct 26, 2021 · US
Pulse plated abrasive grit
US-11078588-B2 · Aug 3, 2021 · US
System and method to apply multiple thermal treatments to workpiece and related turbomachine components
US-2021180461-A1 · Jun 17, 2021 · US
Icephobic vane for a compressor of an axial turbine engine
US-10907488-B2 · Feb 2, 2021 · US
Method of applying riblets to an aerodynamic surface
US-10760600-B2 · Sep 1, 2020 · US
Icephobic Vane for a Compressor of an Axial Turbine Engine
US-2020080433-A1 · Mar 12, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F05D2240/31?
- CPC F05D2240/31 is the Cooperative Patent Classification code for “with roughened surfaces.”
- How many patents are filed under CPC F05D2240/31 (with roughened surfaces)?
- Our database includes 47 publications tagged with this CPC code.
- Is patent activity under CPC F05D2240/31 growing?
- Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).