Method for producing molten steel
US-12281365-B2 · Apr 22, 2025 · US
This page is not indexed by search engines while we improve data quality.
Removing impurities other than carbon, phosphorus or sulfur
Removing impurities other than carbon, phosphorus or sulfur · 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 | C21C1/04 |
| Official title | Removing impurities other than carbon, phosphorus or sulfur |
| Display label | Removing impurities other than carbon, phosphorus or sulfur |
| Total patents | 16 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for refining molten iron
US-2024271233-A1 · Aug 15, 2024 · US
Method for operating converter and method for producing molten steel
US-2024167112-A1 · May 23, 2024 · US
Refining method of molten iron and manufacturing method of molten steel using same
US-2024068060-A1 · Feb 29, 2024 · US
Processes for purifying iron-bearing materials
US-2023399710-A1 · Dec 14, 2023 · US
Non-oriented electrical steel sheet, method for producing same, and hot-rolled steel sheet
US-2023366058-A1 · Nov 16, 2023 · US
Method for producing molten steel
US-2022389527-A1 · Dec 8, 2022 · US
Method of dechromizing molten iron and method of manufacturing phosphate fertilizer raw material
US-11254992-B2 · Feb 22, 2022 · US
Method for ironmaking by smelting reduction in stir-generated vortex
US-11091816-B2 · Aug 17, 2021 · US
Method of dechromizing molten iron and method of manufacturing phosphate fertilizer raw material
US-2020239973-A1 · Jul 30, 2020 · US
Method for ironmaking by smelting reduction in stir-generated vortex
US-2019230746-A1 · Jul 25, 2019 · US
Method for preliminary treatment of molten iron
US-9920390-B2 · Mar 20, 2018 · US
Method for predicting degree of contamination of molten steel during ladle exchange
US-9460248-B2 · Oct 4, 2016 · US
Method of refining molten iron
US-9315875-B2 · Apr 19, 2016 · US
Method for producing mold steel, mold steel, method of producing pre-hardened mold material, and pre-hardened mold material
US-2015044087-A1 · Feb 12, 2015 · US
Method for preliminary treatment of molten iron
US-2015000470-A1 · Jan 1, 2015 · US