Recarburizer and method of producing same
US-2025313909-A1 · Oct 9, 2025 · US
introduction of iron oxide into a bath of molten iron containing a carbon reductant
introduction of iron oxide into a bath of molten iron containing a carbon reductant · 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 | C21B13/0013 |
| Official title | {introduction of iron oxide into a bath of molten iron containing a carbon reductant} |
| Display label | introduction of iron oxide into a bath of molten iron containing a carbon reductant |
| Total patents | 27 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 4 |
| 2017 | 3 |
| 2018 | 4 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 5 |
| 2024 | 1 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for iron making by continuous smelting reduction
US-12378614-B2 · Aug 5, 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
Direct bath smelting process with fast quench of molten material in hot offgas
US-2024279757-A1 · Aug 22, 2024 · US
Direct bath smelting process with management of peripheral cold zones at the metal-slag interface
US-2023407422-A1 · Dec 21, 2023 · US
Process and system for steel and hydrogen production using recycled ferrous scrap and natural gas
US-11692231-B2 · Jul 4, 2023 · US
Process and system for steel and hydrogen production using recycled ferrous scrap and natural gas
US-11680299-B2 · Jun 20, 2023 · US
Method for producing liquid pig iron from a DRI product
US-2023175087-A1 · Jun 8, 2023 · US
Method for iron making by continuous smelting reduction
US-2023082269-A1 · Mar 16, 2023 · US
Method of introducing a metalliferous feed in an ironmaking process
US-2022316017-A1 · Oct 6, 2022 · US
Process and system for steel and hydrogen production using recycled ferrous scrap and natural gas
US-2022275466-A1 · Sep 1, 2022 · US
Process and system for steel and hydrogen production using recycled ferrous scrap and natural gas
US-2021062279-A1 · Mar 4, 2021 · US
Method and system for producing high-carbon DRI using syngas
US-10927424-B2 · Feb 23, 2021 · US
Method and system for producing high-carbon dri using syngas
US-2018371560-A1 · Dec 27, 2018 · US
Method for producing liquid pig iron
US-2018363075-A1 · Dec 20, 2018 · US
Method and apparatus for treating iron-contained raw material using bath smelting furnace
US-2018087120-A1 · Mar 29, 2018 · US
Lance Unblocking Method and Apparatus
US-2018038650-A1 · Feb 8, 2018 · US
Starting a smelting process
US-9771626-B2 · Sep 26, 2017 · US
Direct Smelting Process
US-2017081745-A1 · Mar 23, 2017 · US
Starting a smelting process
US-9551044-B2 · Jan 24, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B13/0013?
- CPC C21B13/0013 is the Cooperative Patent Classification code for “introduction of iron oxide into a bath of molten iron containing a carbon reductant.”
- How many patents are filed under CPC C21B13/0013 (introduction of iron oxide into a bath of molten iron containing a carbon reductant)?
- Our database includes 27 publications tagged with this CPC code.
- Is patent activity under CPC C21B13/0013 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).