Sustainable steel production with co-generation of hydrogen
US-12503737-B2 · Dec 23, 2025 · US
Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 (treating molten metals during moulding B22D1/00, B22D27/00)
Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 (treating molten metals during moulding B22D1/00, B22D27/00) · 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 | C21C7/00 |
| Official title | Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 (treating molten metals during moulding B22D1/00, B22D27/00) |
| Display label | Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 (treating molten metals during moulding B22D1/00, B22D27/00) |
| Total patents | 64 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 3 |
| 2017 | 7 |
| 2018 | 4 |
| 2019 | 17 |
| 2020 | 3 |
| 2021 | 4 |
| 2022 | 4 |
| 2023 | 5 |
| 2024 | 5 |
| 2025 | 6 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Control device for vacuum degassing line, control method for vacuum degassing line, operation method, and method of producing molten steel
US-2025320572-A1 · Oct 16, 2025 · US
Furnace state estimation device, furnace state estimation method, and molten steel production method
US-2025179597-A1 · Jun 5, 2025 · US
Method for controlling nitrogen in steelmaking by spraying hydrogen containing plasma
US-12234521-B2 · Feb 25, 2025 · US
Operation method of ladle refining treatment
US-12172208-B2 · Dec 24, 2024 · US
Method for controlling nitrogen in steelmaking by spraying hydrogen containing plasma
US-2024401161-A1 · Dec 5, 2024 · US
Steel material, and crankshaft made of the steel material
US-2024368744-A1 · Nov 7, 2024 · US
Molten pig iron manufacturing method
US-2024368716-A1 · Nov 7, 2024 · US
Sustainable steel production with co-generation of hydrogen
US-2024327939-A1 · Oct 3, 2024 · US
Steel Material, for Pressure Vessel, Showing Excellent Hydrogen-Induced Cracking Resistance and Method for Preparing Same
US-2023212704-A1 · Jul 6, 2023 · US
Stainless steel with good mirror polishability and method for producing same
US-2023115048-A1 · Apr 13, 2023 · US
Stainless steel for metal foils, stainless steel foil, and methods for producing them
US-2023077573-A1 · Mar 16, 2023 · US
Operation method of ladle refining treatment
US-2023012857-A1 · Jan 19, 2023 · US
Method for dephosphorization of hot metal, and refining agent
US-11542566-B2 · Jan 3, 2023 · US
System and method for determination of air entrapment in ladles
US-11475180-B2 · Oct 18, 2022 · US
Method and system for predicting addition amount of slagging lime during lf refining, and lf refining method
US-2022145413-A1 · May 12, 2022 · US
Method and system for predicting addition amount of slagging lime during LF refining, and LF refining method
US-11326217-B1 · May 10, 2022 · US
Steel material
US-2022025493-A1 · Jan 27, 2022 · US
Carburizer and carburization method using the same
US-2021404047-A1 · Dec 30, 2021 · US
Sulfur additive for molten steel and method for producing resulfurized steel
US-11098384-B2 · Aug 24, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21C7/00?
- CPC C21C7/00 is the Cooperative Patent Classification code for “Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 (treating molten metals during moulding B22D1/00, B22D27/00).”
- How many patents are filed under CPC C21C7/00 (Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 (treating molten metals during moulding B22D1/00, B22D27/00))?
- Our database includes 64 publications tagged with this CPC code.
- Is patent activity under CPC C21C7/00 growing?
- Publication counts under this code: 5 in 2024 vs 6 in 2025 (latest complete years).