A method for manufacturing pig iron in an electrical smelting furnace and associated electrical smelting furnace
US-2026022429-A1 · Jan 22, 2026 · US
Agents used for dephosphorising or desulfurising
Agents used for 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 | C21C1/025 |
| Official title | {Agents used for dephosphorising or desulfurising} |
| Display label | Agents used for dephosphorising or desulfurising |
| Total patents | 31 |
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 | 4 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 4 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 1 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 1 |
| 2026 | 2 |
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 smelting furnace
US-2026015682-A1 · Jan 15, 2026 · US
Process for manufacturing a slag conditioning agent for steel desulfurization
US-12378619-B2 · Aug 5, 2025 · US
Process for manufacturing a slag conditioning agent for steel desulfurization
US-2024247330-A1 · Jul 25, 2024 · US
Method for dephosphorization of molten iron
US-2024229177-A1 · Jul 11, 2024 · US
Process for manufacturing a slag conditioning agent for steel desulfurization
US-11932914-B2 · Mar 19, 2024 · US
Fluorite synthetic stones and method of making fluorite synthetic stones
US-2023357075-A1 · Nov 9, 2023 · US
Method of making steel by deeply dephosphorization in hot metal tank and decarburization using semi-steel with nearly zero phosphorus load in converter
US-11674192-B2 · Jun 13, 2023 · US
Method for removing phosphorus from phosphorus-containing substance
US-11649514-B2 · May 16, 2023 · US
Method of making steel by deeply dephosphorization in hot metal tank and decarburization using semi-steel with nearly zero phosphorus load in converter
US-2023121123-A1 · Apr 20, 2023 · US
Method for dephosphorization of hot metal, and refining agent
US-11542566-B2 · Jan 3, 2023 · US
KR desulfurization stirring paddle casting material and preparation method therefor
US-11267764-B2 · Mar 8, 2022 · US
Process for manufacturing a slag conditioning agent for steel desulfurization
US-2021395846-A1 · Dec 23, 2021 · US
Method for removing phosphorus from phosphorus-containing substance
US-2021071274-A1 · Mar 11, 2021 · US
Method for manufacturing manganese raw material and method for manufacturing manganese-containing molten steel
US-2021054479-A1 · Feb 25, 2021 · US
Method for dephosphorization of molten iron, and refining agent
US-2020385830-A1 · Dec 10, 2020 · US
Process for dephosphorization of molten metal during a refining process
US-10822668-B2 · Nov 3, 2020 · US
Kr desulfurization stirring paddle casting material and preparation method therefor
US-2020308065-A1 · Oct 1, 2020 · US
Molten iron refining method and device thereof
US-10077482-B2 · Sep 18, 2018 · US
Method for refining hot metal in converter
US-9957581-B2 · May 1, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21C1/025?
- CPC C21C1/025 is the Cooperative Patent Classification code for “Agents used for dephosphorising or desulfurising.”
- How many patents are filed under CPC C21C1/025 (Agents used for dephosphorising or desulfurising)?
- Our database includes 31 publications tagged with this CPC code.
- Is patent activity under CPC C21C1/025 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).