Air-conditioning system or refrigerant branch unit
US-11486619-B2 · Nov 1, 2022 · US
Preventing leaks from developing
Preventing leaks from developing · 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 | F25B2500/221 |
| Official title | Preventing leaks from developing |
| Display label | Preventing leaks from developing |
| Total patents | 117 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 6 |
| 2017 | 2 |
| 2018 | 6 |
| 2019 | 11 |
| 2020 | 12 |
| 2021 | 13 |
| 2022 | 20 |
| 2023 | 10 |
| 2024 | 21 |
| 2025 | 8 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Initial power up or power outage refrigerant purge
US-2022325929-A1 · Oct 13, 2022 · US
Multi-air conditioner for heating and cooling operations
US-2022090832-A1 · Mar 24, 2022 · US
Refrigeration apparatus with leak detection on the usage side and a refrigerant release mechanism
US-11280523-B2 · Mar 22, 2022 · US
Multi-air conditioner for heating and cooling and method for controlling multi-air conditioner for heating and cooling
US-2022065505-A1 · Mar 3, 2022 · US
Systems and methods for transport climate control circuit management and isolation
US-2021404718-A1 · Dec 30, 2021 · US
Refrigeration Leak Detection
US-2021404685-A1 · Dec 30, 2021 · US
Refrigeration Leak Detection
US-2021381708-A1 · Dec 9, 2021 · US
Air-conditioning apparatus and air-conditioning system
US-11181303-B2 · Nov 23, 2021 · US
Refrigerant charging method
US-2021348816-A1 · Nov 11, 2021 · US
Refrigeration leak detection
US-11131471-B1 · Sep 28, 2021 · US
Pulse tube refrigerating machine
US-11098931-B2 · Aug 24, 2021 · US
Refrigerant leak detection and mitigation
US-2021207831-A1 · Jul 8, 2021 · US
Refrigeration apparatus
US-11041666-B2 · Jun 22, 2021 · US
Refrigeration apparatus
US-11015852-B2 · May 25, 2021 · US
Air conditioner and indoor unit
US-2021131706-A1 · May 6, 2021 · US
Air-conditioning system or refrigerant branch unit
US-2021071920-A1 · Mar 11, 2021 · US
Refrigerant pipe fitting and refrigerant pipe fitting method using thereof
US-2021003326-A1 · Jan 7, 2021 · US
Air conditioning system
US-10852042-B2 · Dec 1, 2020 · US
Refrigeration cycle apparatus
US-2020333056-A1 · Oct 22, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F25B2500/221?
- CPC F25B2500/221 is the Cooperative Patent Classification code for “Preventing leaks from developing.”
- How many patents are filed under CPC F25B2500/221 (Preventing leaks from developing)?
- Our database includes 117 publications tagged with this CPC code.
- Is patent activity under CPC F25B2500/221 growing?
- Publication counts under this code: 21 in 2024 vs 8 in 2025 (latest complete years).