Defrosting device and refrigerator having the same
US-10386102-B2 · Aug 20, 2019 · US
by hot-fluid circulating system separate from the refrigerant system
by hot-fluid circulating system separate from the refrigerant system · 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 | F25D21/12 |
| Official title | by hot-fluid circulating system separate from the refrigerant system |
| Display label | by hot-fluid circulating system separate from the refrigerant system |
| Total patents | 149 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 13 |
| 2017 | 18 |
| 2018 | 18 |
| 2019 | 15 |
| 2020 | 16 |
| 2021 | 13 |
| 2022 | 17 |
| 2023 | 12 |
| 2024 | 9 |
| 2025 | 6 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Defroster and refrigerator having same
US-2019011171-A1 · Jan 10, 2019 · US
Refrigeration cycle device
US-2018354344-A1 · Dec 13, 2018 · US
Refrigerator appliance with a convertible freezer compartment
US-2018335242-A1 · Nov 22, 2018 · US
Secondary cooling path in refrigerator
US-10132548-B2 · Nov 20, 2018 · US
Refrigerator
US-2018292121-A1 · Oct 11, 2018 · US
Defrosting device and refrigerator having the same
US-2018283766-A1 · Oct 4, 2018 · US
Evaporator and refrigerator having the same
US-2018245826-A1 · Aug 30, 2018 · US
Heat pump
US-10047991-B2 · Aug 14, 2018 · US
Transport refrigeration unit
US-2018195789-A1 · Jul 12, 2018 · US
Defrosting device and refrigerator having the same
US-2018156523-A1 · Jun 7, 2018 · US
Control device for air-conditioning equipment and air conditioning system
US-2018156524-A1 · Jun 7, 2018 · US
Low energy refrigerator heat source
US-2018128536-A1 · May 10, 2018 · US
Refrigeration Device With A Heat Exchanger
US-2018120018-A1 · May 3, 2018 · US
Low energy evaporator defrost
US-2018058746-A1 · Mar 1, 2018 · US
Low Charge Packaged Refrigeration Systems
US-2018045444-A1 · Feb 15, 2018 · US
Specialty cooling features using extruded evaporator
US-9885513-B2 · Feb 6, 2018 · US
Unitary heat pump air conditioner having a compressed vapor diversion loop
US-9879891-B2 · Jan 30, 2018 · US
Low energy refrigerator heat source
US-9874390-B2 · Jan 23, 2018 · US
Sublimation defrost system and sublimation defrost method for refrigeration apparatus
US-9863677-B2 · Jan 9, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F25D21/12?
- CPC F25D21/12 is the Cooperative Patent Classification code for “by hot-fluid circulating system separate from the refrigerant system.”
- How many patents are filed under CPC F25D21/12 (by hot-fluid circulating system separate from the refrigerant system)?
- Our database includes 149 publications tagged with this CPC code.
- Is patent activity under CPC F25D21/12 growing?
- Publication counts under this code: 9 in 2024 vs 6 in 2025 (latest complete years).