Method for determining batch thickness in an all-electric glass tank
US-2026084996-A1 · Mar 26, 2026 · US
Devices for monitoring the level of the melt
Devices for monitoring the level of the melt · 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 | F27D21/0028 |
| Official title | {Devices for monitoring the level of the melt} |
| Display label | Devices for monitoring the level of the melt |
| Total patents | 41 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 6 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 3 |
| 2021 | 2 |
| 2022 | 4 |
| 2023 | 4 |
| 2024 | 6 |
| 2025 | 4 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Liquid level detection method and detection apparatus for the same, molten material liquid level detection method and detection apparatus for the same, and method for operating vertical furnace
US-12584690-B2 · Mar 24, 2026 · US
Residual liquid amount detection method and detection apparatus for the same, residual molten material amount detection method and detection apparatus for the same, and method for operating vertical furnace
US-12577629-B2 · Mar 17, 2026 · US
Method for detecting fluctuation of solidified layer and method for operating blast furnace
US-12540363-B2 · Feb 3, 2026 · US
Metal material supply device
US-12487030-B2 · Dec 2, 2025 · US
Refill system with improved utilization rate of ultra-thin glass production process
US-12415741-B2 · Sep 16, 2025 · US
Sensor controlled launder flow
US-12311434-B2 · May 27, 2025 · US
Automatic monitoring of smelt flow exiting a recovery boiler
US-12195918-B2 · Jan 14, 2025 · US
Furnace slag amount estimation device, furnace slag amount estimation method, and molten steel production method
US-2024393159-A1 · Nov 28, 2024 · US
Blast furnace slag level estimation method, operation guidance method, method of producing hot metal, blast furnace slag level estimation apparatus, and operation guidance apparatus
US-2024337447-A1 · Oct 10, 2024 · US
Sensor controlled launder flow
US-2024226995-A9 · Jul 11, 2024 · US
Residual liquid amount detection method and detection apparatus for the same, residual molten material amount detection method and detection apparatus for the same, and method for operating vertical furnace
US-2024132982-A1 · Apr 25, 2024 · US
Sensor controlled launder flow
US-2024131577-A1 · Apr 25, 2024 · US
Liquid level detection method and detection apparatus for the same, molten material liquid level detection method and detection apparatus for the same, and method for operating vertical furnace
US-2024118029-A1 · Apr 11, 2024 · US
Furnace controller and method of operating a furnace
US-11740022-B2 · Aug 29, 2023 · US
Method for detecting fluctuation of solidified layer and method for operating blast furnace
US-2023151448-A1 · May 18, 2023 · US
Metal material supply device
US-2023113814-A1 · Apr 13, 2023 · US
Melting method in an electric arc furnace and melting apparatus
US-2023040089-A1 · Feb 9, 2023 · US
Automatic monitoring of smelt flow exiting a recovery boiler
US-2022396918-A1 · Dec 15, 2022 · US
System and method of operating a batch melting furnace
US-11441206-B2 · Sep 13, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F27D21/0028?
- CPC F27D21/0028 is the Cooperative Patent Classification code for “Devices for monitoring the level of the melt.”
- How many patents are filed under CPC F27D21/0028 (Devices for monitoring the level of the melt)?
- Our database includes 41 publications tagged with this CPC code.
- Is patent activity under CPC F27D21/0028 growing?
- Publication counts under this code: 6 in 2024 vs 4 in 2025 (latest complete years).