A method for manufacturing pig iron in an electrical smelting furnace and associated electrical smelting furnace
US-2026043100-A1 · Feb 12, 2026 · US
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Tapping equipment; Equipment for removing {or retaining} slag
Tapping equipment; Equipment for removing {or retaining} slag · 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 | F27D3/15 |
| Official title | Tapping equipment; Equipment for removing {or retaining} slag |
| Display label | Tapping equipment; Equipment for removing {or retaining} slag |
| Total patents | 15 |
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 | 1 |
| 2017 | 1 |
| 2019 | 2 |
| 2020 | 4 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hood for Si-metal tapping
US-11874064-B2 · Jan 16, 2024 · US
Slag door for a melting furnace
US-11614283-B2 · Mar 28, 2023 · US
Roller treatment process and treatment device suitable for total-amount steel slag treatment
US-11519043-B2 · Dec 6, 2022 · US
Melting work device and melting work method
US-11473842-B2 · Oct 18, 2022 · US
Control method and apparatus for inhibiting slag entrapment in ladle in last stage of pouring during continuous casting
US-11154926-B2 · Oct 26, 2021 · US
Second-level liquid slag cache system with flow and temperature monitoring and control functions
US-11079179-B2 · Aug 3, 2021 · US
Melting work device and melting work method
US-2020400376-A1 · Dec 24, 2020 · US
Hood for si-metal tapping
US-2020393198-A1 · Dec 17, 2020 · US
Second-level liquid slag cache system with flow and temperature monitoring and control functions
US-2020355437-A1 · Nov 12, 2020 · US
Slag door for a melting furnace
US-2020309456-A1 · Oct 1, 2020 · US
Control method and apparatus for inhibiting slag entrapment in ladle in last stage of pouring during continuous casting
US-2019291176-A1 · Sep 26, 2019 · US
Roller treatment process and treatment device suitable for total-amount steel slag treatment
US-2019203307-A1 · Jul 4, 2019 · US
Tap on a metallurgical vessel, in particular on an electric arc furnace
US-2017261263-A1 · Sep 14, 2017 · US
Slag removal device and slag removal method
US-2015240322-A1 · Aug 27, 2015 · US