Cooling system with temperature rise indication capability
US-2021389043-A1 · Dec 16, 2021 · US
by timer
by timer · 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 | F25D21/008 |
| Official title | {by timer} |
| Display label | by timer |
| Total patents | 112 |
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 | 10 |
| 2016 | 4 |
| 2017 | 1 |
| 2018 | 12 |
| 2019 | 14 |
| 2020 | 12 |
| 2021 | 24 |
| 2022 | 14 |
| 2023 | 6 |
| 2024 | 7 |
| 2025 | 5 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for measuring defrost time in a refrigeration space
US-11175087-B1 · Nov 16, 2021 · US
Refrigerator and method for controlling the same
US-2021207874-A1 · Jul 8, 2021 · US
Refrigerator
US-2021148625-A1 · May 20, 2021 · US
Controlled defrost for chilled environments
US-2021140701-A1 · May 13, 2021 · US
Refrigerator
US-10907872-B2 · Feb 2, 2021 · US
System and method of controlling refrigerator and freezer units to reduce consumed energy
US-10883757-B2 · Jan 5, 2021 · US
Defrosting system for a cold plate and method of defrosting a cold plate
US-2020370816-A1 · Nov 26, 2020 · US
Refrigerator
US-2020224951-A1 · Jul 16, 2020 · US
Return air intake grille de-icing method
US-10696139-B2 · Jun 30, 2020 · US
Systems and methods for multi-sense control algorithm for atomizers in refrigerators
US-10690360-B2 · Jun 23, 2020 · US
Refrigerator and controlling method thereof
US-2020173709-A1 · Jun 4, 2020 · US
Refrigerator and control method thereof
US-2020173708-A1 · Jun 4, 2020 · US
Refrigerator and method of controlling the same
US-2020166269-A1 · May 28, 2020 · US
Defrost heat discharge system and refrigerator having the same
US-10663213-B2 · May 26, 2020 · US
Evaporator coil protection for HVAC systems
US-10655877-B2 · May 19, 2020 · US
Merchandiser including frame heaters
US-10655904-B2 · May 19, 2020 · US
Method for operating a fan within a refrigerator appliance
US-10634414-B2 · Apr 28, 2020 · US
Device and method for measuring defrost time
US-2020072531-A1 · Mar 5, 2020 · US
Supplemental cooling system load control using random start of first defrost cycle
US-10488100-B2 · Nov 26, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F25D21/008?
- CPC F25D21/008 is the Cooperative Patent Classification code for “by timer.”
- How many patents are filed under CPC F25D21/008 (by timer)?
- Our database includes 112 publications tagged with this CPC code.
- Is patent activity under CPC F25D21/008 growing?
- Publication counts under this code: 7 in 2024 vs 5 in 2025 (latest complete years).