Refrigeration cycle apparatus
US-2018363965-A1 · Dec 20, 2018 · US
by injecting a liquid
by injecting a liquid · 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 | F25B31/008 |
| Official title | {by injecting a liquid} |
| Display label | by injecting a liquid |
| Total patents | 216 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 15 |
| 2017 | 18 |
| 2018 | 22 |
| 2019 | 24 |
| 2020 | 26 |
| 2021 | 24 |
| 2022 | 21 |
| 2023 | 17 |
| 2024 | 17 |
| 2025 | 17 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Compressor Cooling System
US-2018347877-A1 · Dec 6, 2018 · US
Refrigerant vapor compression system operation
US-10088202-B2 · Oct 2, 2018 · US
Motor cooling system for chillers
US-10072468-B2 · Sep 11, 2018 · US
Vehicle air conditioner
US-10047988-B2 · Aug 14, 2018 · US
Oil separate and collect device
US-2018202425-A1 · Jul 19, 2018 · US
Cooling system with low temperature load
US-9982919-B2 · May 29, 2018 · US
Scroll compressor and refrigeration cycle apparatus
US-2018128270-A1 · May 10, 2018 · US
Compressor driving motor and cooling method for same
US-2018094626-A1 · Apr 5, 2018 · US
Refrigerant distribution apparatus and methods for transport refrigeration system
US-9909786-B2 · Mar 6, 2018 · US
Closed loop solar refrigeration system
US-2018031286-A1 · Feb 1, 2018 · US
Turbo refrigerator
US-9879886-B2 · Jan 30, 2018 · US
Cooling fan for refrigerant cooled motor
US-2018017296-A1 · Jan 18, 2018 · US
Air conditioner system of a vehicle
US-9855834-B2 · Jan 2, 2018 · US
Air-conditioning apparatus with regulation of injection flow rate
US-9797610-B2 · Oct 24, 2017 · US
Solar refrigeration system with a closed refrigerant loop
US-9791187-B2 · Oct 17, 2017 · US
Refrigerant cooling and lubrication system with refrigerant vapor vent line
US-2017234585-A1 · Aug 17, 2017 · US
Motor of compressor and refrigeration cycle apparatus
US-2017222528-A1 · Aug 3, 2017 · US
Outdoor unit and refrigeration cycle apparatus
US-2017205128-A1 · Jul 20, 2017 · US
Compressor cooling system
US-2017198696-A1 · Jul 13, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F25B31/008?
- CPC F25B31/008 is the Cooperative Patent Classification code for “by injecting a liquid.”
- How many patents are filed under CPC F25B31/008 (by injecting a liquid)?
- Our database includes 216 publications tagged with this CPC code.
- Is patent activity under CPC F25B31/008 growing?
- Publication counts under this code: 17 in 2024 vs 17 in 2025 (latest complete years).