A method for manufacturing pig iron in an electrical smelting furnace and associated electrical smelting furnace
US-2026043100-A1 · Feb 12, 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 | C21C7/0645 |
| Official title | {Agents used for dephosphorising or desulfurising} |
| Display label | Agents used for dephosphorising or desulfurising |
| Total patents | 65 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 2 |
| 2017 | 6 |
| 2018 | 4 |
| 2019 | 11 |
| 2020 | 6 |
| 2021 | 6 |
| 2022 | 2 |
| 2023 | 8 |
| 2024 | 7 |
| 2025 | 4 |
| 2026 | 6 |
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-2025388985-A1 · Dec 25, 2025 · US
Methods for processing entrained slag inclusions in steel with deoxidized calcium with fixed aluminum
US-2025346970-A1 · Nov 13, 2025 · US
Process for manufacturing a slag conditioning agent for steel desulfurization
US-12378619-B2 · Aug 5, 2025 · US
Method for producing grained iron, and grained iron
US-2025243554-A1 · Jul 31, 2025 · US
Converter bottom blowing system capable of allowing multiple media to share bottom blowing lances and method for using same
US-12123063-B2 · Oct 22, 2024 · US
Method for secondarily refining molten steel and method of producing steel
US-2024271234-A1 · Aug 15, 2024 · US
Molten steel denitrification method, simultaneous denitrification and desulfurization treatment method, and steel production method
US-2024263261-A1 · Aug 8, 2024 · US
Method for producing steel
US-12054796-B2 · Aug 6, 2024 · US
Process for manufacturing a slag conditioning agent for steel desulfurization
US-2024247330-A1 · Jul 25, 2024 · US
Converter bottom blowing system capable of allowing multiple media to share bottom blowing lances and method for using same
US-2024247328-A1 · Jul 25, 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
Red mud-based composite calcium ferrite and preparation method and use thereof
US-11773025-B2 · Oct 3, 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
Red mud-based composite calcium ferrite and preparation method and use thereof
US-2023117352-A1 · Apr 20, 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
Alloy steel manufacturing method
US-11549162-B2 · Jan 10, 2023 · US
Method for dephosphorization of hot metal, and refining agent
US-11542566-B2 · Jan 3, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21C7/0645?
- CPC C21C7/0645 is the Cooperative Patent Classification code for “Agents used for dephosphorising or desulfurising.”
- How many patents are filed under CPC C21C7/0645 (Agents used for dephosphorising or desulfurising)?
- Our database includes 65 publications tagged with this CPC code.
- Is patent activity under CPC C21C7/0645 growing?
- Publication counts under this code: 7 in 2024 vs 4 in 2025 (latest complete years).