Method of controlling operation of fuel cell triple cogeneration system
US-2025149603-A1 · May 8, 2025 · US
the refrigerant being ammonia evaporated from aqueous solution {(F25B15/025 takes precedence)}
the refrigerant being ammonia evaporated from aqueous solution {(F25B15/025 takes precedence)} · 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 | F25B15/04 |
| Official title | the refrigerant being ammonia evaporated from aqueous solution {(F25B15/025 takes precedence)} |
| Display label | the refrigerant being ammonia evaporated from aqueous solution {(F25B15/025 takes precedence)} |
| Total patents | 52 |
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 | 3 |
| 2016 | 1 |
| 2017 | 4 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 9 |
| 2021 | 11 |
| 2022 | 7 |
| 2023 | 6 |
| 2024 | 4 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Defrost system which utilizes electric heater for thermosiphon
US-12292226-B2 · May 6, 2025 · US
Green ammonia absorption cooling
US-2025100892-A1 · Mar 27, 2025 · US
Sorption system and method for operating same
US-12018864-B2 · Jun 25, 2024 · US
Compact membrane-based thermochemical energy storage system
US-11988454-B2 · May 21, 2024 · US
Cooling machine
US-11940184-B2 · Mar 26, 2024 · US
Waste heat utilizing absorption refrigeration system for climate control and/or electric systems cooling
US-2024042823-A1 · Feb 8, 2024 · US
Cooling machine
US-11768015-B2 · Sep 26, 2023 · US
Refrigerator based on molecular sieve
US-11768021-B2 · Sep 26, 2023 · US
Defrost system
US-2023127825-A1 · Apr 27, 2023 · US
Liquid ammonia, sodium nitrate and lithium bromide absorption refrigeration system
US-11609028-B2 · Mar 21, 2023 · US
Compact membrane-based thermochemical energy storage system
US-2023075850-A1 · Mar 9, 2023 · US
Sorption system and method for operating same
US-2023041044-A1 · Feb 9, 2023 · US
Refrigerator based on molecular sieve
US-2022381488-A1 · Dec 1, 2022 · US
Heat pump for a HVACandR system
US-11486612-B2 · Nov 1, 2022 · US
Air-cooled ammonia refrigeration systems and methods
US-11466905-B2 · Oct 11, 2022 · US
Method and arrangement
US-2022154974-A1 · May 19, 2022 · US
Utilization of solar systems to harvest atmospheric moisture for various applications including panel cleaning
US-11303244-B2 · Apr 12, 2022 · US
Liquid ammonia, sodium nitrate and lithium bromide diffusion refrigeration system
US-2022057117-A1 · Feb 24, 2022 · US
Liquid ammonia, sodium nitrate and lithium bromide absorption refrigeration system
US-2022057116-A1 · Feb 24, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F25B15/04?
- CPC F25B15/04 is the Cooperative Patent Classification code for “the refrigerant being ammonia evaporated from aqueous solution {(F25B15/025 takes precedence)}.”
- How many patents are filed under CPC F25B15/04 (the refrigerant being ammonia evaporated from aqueous solution {(F25B15/025 takes precedence)})?
- Our database includes 52 publications tagged with this CPC code.
- Is patent activity under CPC F25B15/04 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).