Compressor, refrigerant compressing apparatus, and refrigerating apparatus
US-2018347556-A1 · Dec 6, 2018 · US
Hermetic compressors
Hermetic compressors · 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 | F04B39/023 |
| Official title | {Hermetic compressors} |
| Display label | Hermetic compressors |
| Total patents | 154 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 12 |
| 2016 | 20 |
| 2017 | 19 |
| 2018 | 16 |
| 2019 | 12 |
| 2020 | 19 |
| 2021 | 12 |
| 2022 | 13 |
| 2023 | 14 |
| 2024 | 9 |
| 2025 | 7 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hermetic Compressor for Positive Displacement
US-2018335233-A1 · Nov 22, 2018 · US
Compressor having oil-level sensing system
US-10125768-B2 · Nov 13, 2018 · US
Compressor With Flooded Start Control
US-2018320672-A1 · Nov 8, 2018 · US
Closed compressor and refrigeration device
US-2018216609-A1 · Aug 2, 2018 · US
Sealed compressor and refrigeration device
US-10001116-B2 · Jun 19, 2018 · US
Simple inverter-control-type refrigerator, inverter control unit for refrigerator, and inverter compressor using same
US-10001311-B2 · Jun 19, 2018 · US
Method and a system for protecting a resonant linear compressor
US-10001119-B2 · Jun 19, 2018 · US
Refrigeration apparatus
US-9897360-B2 · Feb 20, 2018 · US
Introduced in a System for Connecting Refrigerant Fluid Discharge Tubes to Cylinder Caps of Hermetic Compressors, and Corresponding Process of Performing Thereof
US-2017356434-A1 · Dec 14, 2017 · US
Hermetic rotary compressor
US-9828996-B2 · Nov 28, 2017 · US
Linear compressor
US-2017321671-A1 · Nov 9, 2017 · US
Permanent magnet embedded electric motor, compressor and refrigeration air conditioner
US-2017294814-A1 · Oct 12, 2017 · US
Compressor assembly with liquid sensor
US-9784274-B2 · Oct 10, 2017 · US
Closed compressor and refrigeration device
US-2017268492-A1 · Sep 21, 2017 · US
Acoustic Attenuating Device for Compressors
US-2017248131-A1 · Aug 31, 2017 · US
Hermetic compressor
US-9745973-B2 · Aug 29, 2017 · US
Hermetically sealed rotary compressor and refrigeration cycle device
US-9719512-B2 · Aug 1, 2017 · US
Network device and communication control method
US-9719383-B2 · Aug 1, 2017 · US
Sealed System for An Appliance
US-2017211869-A1 · Jul 27, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B39/023?
- CPC F04B39/023 is the Cooperative Patent Classification code for “Hermetic compressors.”
- How many patents are filed under CPC F04B39/023 (Hermetic compressors)?
- Our database includes 154 publications tagged with this CPC code.
- Is patent activity under CPC F04B39/023 growing?
- Publication counts under this code: 9 in 2024 vs 7 in 2025 (latest complete years).