Moving part, compressor, and manufacturing method thereof
US-12038005-B2 · Jul 16, 2024 · US
Surface treatment
Surface treatment · 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 | F04C2230/92 |
| Official title | Surface treatment |
| Display label | Surface treatment |
| Total patents | 65 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 6 |
| 2017 | 9 |
| 2018 | 3 |
| 2019 | 6 |
| 2020 | 8 |
| 2021 | 7 |
| 2022 | 3 |
| 2023 | 7 |
| 2024 | 4 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Roots pump containing rotors that capture and discharge a foreign substance
US-11976656-B2 · May 7, 2024 · US
Rotary compressor including a plurality of recessed portions for retaining lubricating oil
US-11959480-B2 · Apr 16, 2024 · US
Aluminum alloy for sliding component, and sliding component
US-2023399723-A1 · Dec 14, 2023 · US
Roots pump
US-2023304497-A1 · Sep 28, 2023 · US
Sealing structure and scroll air compressor having same
US-11725657-B2 · Aug 15, 2023 · US
Moving part, compressor, and manufacturing method thereof
US-2023250821-A1 · Aug 10, 2023 · US
Gear and bearing indents to induce fluid film
US-11713716-B2 · Aug 1, 2023 · US
Rotary compressor
US-2023050050-A1 · Feb 16, 2023 · US
Gear and bearing indents to induce fluid film
US-2023048163-A1 · Feb 16, 2023 · US
Compressor including laser-hardened bearing surfaces
US-2022099091-A1 · Mar 31, 2022 · US
Sealing structure and scroll air compressor having same
US-2022034322-A1 · Feb 3, 2022 · US
Phobic/philic structures in refrigeration systems and liquid vapor separation in refrigeration systems
US-2022026125-A1 · Jan 27, 2022 · US
Mud motor stators and pumps and method of making
US-11192211-B2 · Dec 7, 2021 · US
Phobic/philic structures in refrigeration systems and liquid vapor separation in refrigeration systems
US-11137183-B2 · Oct 5, 2021 · US
Outer ring for variable oil pump and manufacturing method thereof
US-2021252595-A1 · Aug 19, 2021 · US
Scroll compressor including fixed and orbiting scrolls having different heights and surface hardenings
US-11092155-B2 · Aug 17, 2021 · US
Friction-Optimized Vacuum Orbiter Pump
US-2021222694-A1 · Jul 22, 2021 · US
Vane pump
US-11035363-B2 · Jun 15, 2021 · US
Scroll compressor including a fixed and orbiting scroll
US-2021148361-A1 · May 20, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C2230/92?
- CPC F04C2230/92 is the Cooperative Patent Classification code for “Surface treatment.”
- How many patents are filed under CPC F04C2230/92 (Surface treatment)?
- Our database includes 65 publications tagged with this CPC code.
- Is patent activity under CPC F04C2230/92 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).