Method of operating an electric arc furnace and steel mill
US-12584182-B2 · Mar 24, 2026 · US
obtaining iron or steel in a molten state
obtaining iron or steel in a molten state · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C21B13/0006 |
| Official title | {obtaining iron or steel in a molten state} |
| Display label | obtaining iron or steel in a molten state |
| Total patents | 61 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 4 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 1 |
| 2022 | 2 |
| 2023 | 6 |
| 2024 | 8 |
| 2025 | 22 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Treating cooling water in iron production facilities, and associated systems, devices, and methods
US-2026054312-A1 · Feb 26, 2026 · US
Use of residual iron within granulated metallic unit production facilities, and associated systems, devices, and methods
US-2026034581-A1 · Feb 5, 2026 · US
Continuous granulated metallic units production, and associated systems, devices, and methods
US-2026001124-A1 · Jan 1, 2026 · US
Use of a basic oxygen furnace to produce granulated metallic units, and associated systems, devices, and methods
US-2025353076-A1 · Nov 20, 2025 · US
Use of residual iron within granulated metallic unit production facilities, and associated systems, devices, and methods
US-12465973-B2 · Nov 11, 2025 · US
Continuous granulated metallic units production, and associated systems, devices, and methods
US-12427569-B2 · Sep 30, 2025 · US
Production device for carbon material, production system for carbon material, carbon circulation system, production method for carbon material, and carbon circulation method
US-2025296062-A1 · Sep 25, 2025 · US
Low-carbon granulated metallic units
US-12420335-B2 · Sep 23, 2025 · US
Method for melting direct reduced iron, solid iron and method for producing the same, material for civil engineering and construction and method for producing the same, and system for melting direct reduced iron
US-2025283185-A1 · Sep 11, 2025 · US
Use of a basic oxygen furnace to produce granulated metallic units, and associated systems, devices, and methods
US-12403529-B2 · Sep 2, 2025 · US
Low-sulfur granulated metallic units
US-12397346-B2 · Aug 26, 2025 · US
Method for iron making by continuous smelting reduction
US-12378614-B2 · Aug 5, 2025 · US
Method for producing grained iron, and grained iron
US-2025243554-A1 · Jul 31, 2025 · US
Treating cooling water in iron production facilities, and associated systems, devices, and methods
US-12370599-B2 · Jul 29, 2025 · US
Method for manufacturing carbonaceous material-containing agglomerate ore, and method for manufacturing molten pig iron
US-2025137080-A1 · May 1, 2025 · US
Processing granulated metallic units within electric arc furnaces, and associated systems and methods
US-2025084496-A1 · Mar 13, 2025 · US
Torpedo cars for use with granulated metallic unit production, and associated systems, devices, and methods
US-2025083222-A1 · Mar 13, 2025 · US
Continuous granulated metallic units production, and associated systems, devices, and methods
US-2025083232-A1 · Mar 13, 2025 · US
Low-sulfur granulated metallic units, and associated systems, devices, and methods
US-2025083223-A1 · Mar 13, 2025 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B13/0006?
- CPC C21B13/0006 is the Cooperative Patent Classification code for “obtaining iron or steel in a molten state.”
- How many patents are filed under CPC C21B13/0006 (obtaining iron or steel in a molten state)?
- Our database includes 61 publications tagged with this CPC code.
- Is patent activity under CPC C21B13/0006 growing?
- Publication counts under this code: 8 in 2024 vs 22 in 2025 (latest complete years).