Molten iron dephosphorization method
US-12584183-B2 · Mar 24, 2026 · US
Dephosphorising or desulfurising
Dephosphorising or desulfurising · 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 | C21C1/02 |
| Official title | Dephosphorising or desulfurising |
| Display label | Dephosphorising or desulfurising |
| Total patents | 44 |
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 | 5 |
| 2018 | 4 |
| 2019 | 2 |
| 2020 | 4 |
| 2021 | 1 |
| 2022 | 4 |
| 2023 | 2 |
| 2024 | 7 |
| 2025 | 4 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
A method for manufacturing pig iron in an electrical smelting furnace and associated electrical smelting furnace
US-2026043100-A1 · Feb 12, 2026 · US
A method for manufacturing pig iron in an electrical smelting furnace and associated electrical smelting furnace
US-2026028687-A1 · Jan 29, 2026 · US
Method for manufacturing pig iron into an electrical smelting furnace and associated smelting furnace
US-2026022428-A1 · Jan 22, 2026 · US
Method for producing grained iron, and grained iron
US-2025243554-A1 · Jul 31, 2025 · US
Electrolytic smelting system
US-12305245-B2 · May 20, 2025 · US
Cold iron source melting ratio estimation device, converter-type refining furnace control device, cold iron source melting ratio estimation method, and molten iron refining treatment method
US-2025075280-A1 · Mar 6, 2025 · US
Process for the refining of iron oxides, iron oxides resulting thereof and their use
US-2025042764-A1 · Feb 6, 2025 · US
Molten pig iron manufacturing method
US-2024368716-A1 · Nov 7, 2024 · US
Method for dephosphorization of molten iron
US-2024229177-A1 · Jul 11, 2024 · US
Method for operating converter and method for producing molten steel
US-2024167112-A1 · May 23, 2024 · US
Method for desulfurizing molten metal
US-2024076756-A1 · Mar 7, 2024 · US
Converter steelmaking method
US-2024068061-A1 · Feb 29, 2024 · US
Refining method of molten iron and manufacturing method of molten steel using same
US-2024068060-A1 · Feb 29, 2024 · US
Molten iron refining method
US-2024060149-A1 · Feb 22, 2024 · US
Method for manufacturing low-phosphorus molten steel
US-2023313330-A1 · Oct 5, 2023 · US
Method for dephosphorization of hot metal, and refining agent
US-11542566-B2 · Jan 3, 2023 · US
Molten iron dephosphorization method
US-2022259686-A1 · Aug 18, 2022 · US
Electrolytic smelting system
US-2022243293-A1 · Aug 4, 2022 · US
KR desulfurization stirring paddle casting material and preparation method therefor
US-11267764-B2 · Mar 8, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21C1/02?
- CPC C21C1/02 is the Cooperative Patent Classification code for “Dephosphorising or desulfurising.”
- How many patents are filed under CPC C21C1/02 (Dephosphorising or desulfurising)?
- Our database includes 44 publications tagged with this CPC code.
- Is patent activity under CPC C21C1/02 growing?
- Publication counts under this code: 7 in 2024 vs 4 in 2025 (latest complete years).