Rotary engine with housing having silicon carbide plate
US-11613995-B2 · Mar 28, 2023 · US
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Improving properties of machine parts
Improving properties of machine parts · 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 | F04C2230/90 |
| Official title | Improving properties of machine parts |
| Display label | Improving properties of machine parts |
| Total patents | 14 |
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 | 1 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 3 |
| 2023 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of manufacture of scroll compressors and scroll compressors manufactured thereby
US-11486394-B2 · Nov 1, 2022 · US
Variable lubricant vane pump
US-11396811-B2 · Jul 26, 2022 · US
Pump end plate manufacturing method and pump
US-11255330-B2 · Feb 22, 2022 · US
Rotor for a compressor
US-11047387-B2 · Jun 29, 2021 · US
Pump end plate manufacturing method and pump
US-2021148364-A1 · May 20, 2021 · US
Method for modifying performance of rotor profile by adjusting meshing line segments
US-10883496-B2 · Jan 5, 2021 · US
Variable lubricant vane pump
US-2020300092-A1 · Sep 24, 2020 · US
Method of manufacture of scroll compressors and scroll compressors manufactured thereby
US-2020248688-A1 · Aug 6, 2020 · US
Rotary engine with housing having silicon carbide plate
US-2020200009-A1 · Jun 25, 2020 · US
Hybrid metal-plastic parts and process for manufacturing the same
US-2019195221-A1 · Jun 27, 2019 · US
Method for Modifying Performance of Rotor Profile by Adjusting Meshing Line Segments
US-2019186487-A1 · Jun 20, 2019 · US
Rotor for a compressor
US-2019093655-A1 · Mar 28, 2019 · US
Trochoidal rotary device
US-9121405-B2 · Sep 1, 2015 · US