Adsorption heat pump
US-12529500-B2 · Jan 20, 2026 · US
for absorption-type refrigeration systems
for absorption-type refrigeration systems · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C09K5/047 |
| Official title | {for absorption-type refrigeration systems} |
| Display label | for absorption-type refrigeration systems |
| Total patents | 59 |
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 | 7 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 6 |
| 2019 | 9 |
| 2020 | 4 |
| 2021 | 9 |
| 2022 | 3 |
| 2023 | 7 |
| 2024 | 4 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Heat pump and heat pump unit using same
US-12276465-B2 · Apr 15, 2025 · US
Coolant and heat pump refrigerant
US-2024400876-A1 · Dec 5, 2024 · US
Absorption Refrigeration Cycle and Compression-Absorption Refrigeration Cycle
US-2024263061-A1 · Aug 8, 2024 · US
Waste heat utilizing absorption refrigeration system for climate control and/or electric systems cooling
US-2024042823-A1 · Feb 8, 2024 · US
Adsorption cooling system using carbon aerogel
US-11878282-B2 · Jan 23, 2024 · US
Heat pump and heat pump unit using same
US-2023392884-A1 · Dec 7, 2023 · US
Sustainable evaporative cooling coating for a broad range of relative humidity
US-2023392062-A1 · Dec 7, 2023 · US
Adsorption heat pump
US-2023375235-A1 · Nov 23, 2023 · US
Diffusion absorption refrigeration apparatus and refrigeration method
US-11674720-B2 · Jun 13, 2023 · US
Air-conditioning method and device
US-11609000-B2 · Mar 21, 2023 · US
Ionic liquid additives for use as an absorbent in absorption chillers
US-11608460-B2 · Mar 21, 2023 · US
Liquid ammonia, sodium nitrate and lithium bromide absorption refrigeration system
US-11609028-B2 · Mar 21, 2023 · US
Absorption cycle apparatus and related method
US-11466189-B2 · Oct 11, 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
Adsorption cooling system using carbon aerogel
US-2021346864-A1 · Nov 11, 2021 · US
Adsorption cooling system using carbon aerogel
US-2021308651-A1 · Oct 7, 2021 · US
Liquid desiccant based dehumidification and cooling system
US-11123682-B2 · Sep 21, 2021 · US
Liquid desiccant based dehumidification and cooling system
US-11090605-B2 · Aug 17, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C09K5/047?
- CPC C09K5/047 is the Cooperative Patent Classification code for “for absorption-type refrigeration systems.”
- How many patents are filed under CPC C09K5/047 (for absorption-type refrigeration systems)?
- Our database includes 59 publications tagged with this CPC code.
- Is patent activity under CPC C09K5/047 growing?
- Publication counts under this code: 4 in 2024 vs 1 in 2025 (latest complete years).