Refrigerant compositions for refrigerant compressor systems
US-12410351-B2 · Sep 9, 2025 · US
characterised by the use of a special lubricant
characterised by the use of a special lubricant · 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 | F04B39/0215 |
| Official title | {characterised by the use of a special lubricant} |
| Display label | characterised by the use of a special lubricant |
| Total patents | 44 |
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 | 4 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 4 |
| 2019 | 5 |
| 2020 | 7 |
| 2021 | 7 |
| 2022 | 5 |
| 2023 | 5 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Compressor and manufacturing method thereof
US-11976650-B2 · May 7, 2024 · US
Refrigerant compositions for refrigerant compressor systems
US-2023374361-A1 · Nov 23, 2023 · US
Linear compressor
US-11746768-B2 · Sep 5, 2023 · US
Linear compressor
US-11725642-B2 · Aug 15, 2023 · US
Linear compressor
US-11725644-B2 · Aug 15, 2023 · US
Compressor and manufacturing method thereof
US-11542939-B2 · Jan 3, 2023 · US
Liquid injection ring and refrigerant lubricated bearing assembly
US-11473625-B2 · Oct 18, 2022 · US
Linear compressor
US-2022170450-A1 · Jun 2, 2022 · US
Linear compressor
US-2022090591-A1 · Mar 24, 2022 · US
Linear compressor
US-11261856-B2 · Mar 1, 2022 · US
Linear compressor
US-11231025-B2 · Jan 25, 2022 · US
Liquid Injection Ring and Refrigerant Lubricated Bearing Assembly
US-2021270321-A1 · Sep 2, 2021 · US
Compressor and manufacturing method thereof
US-2021140425-A1 · May 13, 2021 · US
Compressor and manufacturing method thereof
US-2021140424-A1 · May 13, 2021 · US
Linear compressor
US-2021095653-A1 · Apr 1, 2021 · US
Ti alloy nano composite coating-film and manufacturing method therefor
US-2021047721-A1 · Feb 18, 2021 · US
Refrigerant compressor and freezer including same
US-10914010-B2 · Feb 9, 2021 · US
Refrigerant compressor and freezing apparatus using same
US-10895408-B2 · Jan 19, 2021 · US
Refrigerant compressor and refrigeration device including refrigerant compressor
US-10865782-B2 · Dec 15, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B39/0215?
- CPC F04B39/0215 is the Cooperative Patent Classification code for “characterised by the use of a special lubricant.”
- How many patents are filed under CPC F04B39/0215 (characterised by the use of a special lubricant)?
- Our database includes 44 publications tagged with this CPC code.
- Is patent activity under CPC F04B39/0215 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).