Refrigeration cycle apparatus, and abnormality detection system for refrigeration cycle apparatus
US-10161661-B2 · Dec 25, 2018 · US
Detecting refrigerant leaks
Detecting refrigerant leaks · 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 | F25B2500/222 |
| Official title | Detecting refrigerant leaks |
| Display label | Detecting refrigerant leaks |
| Total patents | 654 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 20 |
| 2017 | 32 |
| 2018 | 40 |
| 2019 | 64 |
| 2020 | 64 |
| 2021 | 72 |
| 2022 | 105 |
| 2023 | 67 |
| 2024 | 97 |
| 2025 | 68 |
| 2026 | 19 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Refrigeration cycle apparatus and refrigeration cycle system
US-2018106516-A1 · Apr 19, 2018 · US
Indoor unit for air-conditioning apparatus
US-2017370605-A1 · Dec 28, 2017 · US
Air conditioning system and method for leakage detection in an air conditioning system
US-2017355246-A1 · Dec 14, 2017 · US
Indoor unit of air-conditioning apparatus
US-2017343258-A1 · Nov 30, 2017 · US
Air conditioner
US-2017336092-A1 · Nov 23, 2017 · US
Air conditioner
US-2017328620-A1 · Nov 16, 2017 · US
Control device for air conditioning system, air conditioning system, and method for determining anomaly of air conditioning system
US-2017314801-A1 · Nov 2, 2017 · US
System for refrigerant charge verification using two condenser coil temperatures
US-9803902-B2 · Oct 31, 2017 · US
Air conditioning apparatus
US-9791196-B2 · Oct 17, 2017 · US
Cooling device management system with refrigerant leakage detection function
US-9791195-B2 · Oct 17, 2017 · US
Refrigeration cycle apparatus
US-2017292744-A1 · Oct 12, 2017 · US
Air-conditioning apparatus
US-2017284718-A1 · Oct 5, 2017 · US
System for supplying liquefied natural gas fuel with leak detection
US-9776702-B2 · Oct 3, 2017 · US
Detection device for turbomachine system
US-2017276616-A1 · Sep 28, 2017 · US
Refrigeration cycle apparatus, and abnormality detection system for refrigeration cycle apparatus
US-2017268811-A1 · Sep 21, 2017 · US
Heat pump apparatus
US-2017227262-A1 · Aug 10, 2017 · US
Composition for heat cycle system, and heat cycle system
US-9725632-B2 · Aug 8, 2017 · US
Method of and system for detecting loss of refrigerant charge
US-2017219262-A1 · Aug 3, 2017 · US
Method and a system for estimating loss of refrigerant charge in an rvcs system
US-2017219263-A1 · Aug 3, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F25B2500/222?
- CPC F25B2500/222 is the Cooperative Patent Classification code for “Detecting refrigerant leaks.”
- How many patents are filed under CPC F25B2500/222 (Detecting refrigerant leaks)?
- Our database includes 654 publications tagged with this CPC code.
- Is patent activity under CPC F25B2500/222 growing?
- Publication counts under this code: 97 in 2024 vs 68 in 2025 (latest complete years).