Method for operating electric furnace
US-2025383152-A1 · Dec 18, 2025 · US
heated electrically, with or without any other source of heat
heated electrically, with or without any other source of heat · 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 | F27B3/08 |
| Official title | heated electrically, with or without any other source of heat |
| Display label | heated electrically, with or without any other source of heat |
| Total patents | 54 |
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 | 5 |
| 2017 | 4 |
| 2018 | 5 |
| 2019 | 5 |
| 2020 | 8 |
| 2021 | 10 |
| 2022 | 6 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Stack melting apparatus
US-2025180292-A1 · Jun 5, 2025 · US
Electrolytic smelting system
US-12305245-B2 · May 20, 2025 · US
Electric furnace and steelmaking method
US-2024191315-A1 · Jun 13, 2024 · US
Electric furnace
US-11898797-B2 · Feb 13, 2024 · US
Method for controlling furnace, and analyzing device for carrying out this method
US-11885565-B2 · Jan 30, 2024 · US
Method for producing metal ingot
US-11833582-B2 · Dec 5, 2023 · US
Furnace assembly for a metal-making process
US-11543182-B2 · Jan 3, 2023 · US
Electric furnace and method for melting and reducing iron oxide-containing iron raw material
US-11536514-B2 · Dec 27, 2022 · US
Method for producing metal ingot
US-11498118-B2 · Nov 15, 2022 · US
Electric furnace
US-11473841-B2 · Oct 18, 2022 · US
Electrolytic smelting system
US-2022243293-A1 · Aug 4, 2022 · US
Melting furnace with simultaneously rotatable and movable electrode rod
US-11371779-B2 · Jun 28, 2022 · US
Melting method in an electric arc furnace and corresponding apparatus
US-11346605-B2 · May 31, 2022 · US
Graphite production method and production device
US-2021403328-A1 · Dec 30, 2021 · US
Flicker control for electric arc furnace
US-11122654-B2 · Sep 14, 2021 · US
Melting method in an electric arc furnace and corresponding apparatus
US-2021231373-A1 · Jul 29, 2021 · US
Electric furnace and method for melting and reducing iron oxide-containing iron raw material
US-2021190427-A1 · Jun 24, 2021 · US
Auxiliary burner for electric furnace
US-11041621-B2 · Jun 22, 2021 · US
Arc furnace bottom construction
US-11029091-B2 · Jun 8, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F27B3/08?
- CPC F27B3/08 is the Cooperative Patent Classification code for “heated electrically, with or without any other source of heat.”
- How many patents are filed under CPC F27B3/08 (heated electrically, with or without any other source of heat)?
- Our database includes 54 publications tagged with this CPC code.
- Is patent activity under CPC F27B3/08 growing?
- Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).