Method for producing reduced iron
US-12595522-B2 · Apr 7, 2026 · US
by separation
by separation · 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 | C21B2100/28 |
| Official title | by separation |
| Display label | by separation |
| Total patents | 28 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 5 |
| 2023 | 4 |
| 2024 | 4 |
| 2025 | 5 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Iron ore reducing and melting apparatus and method
US-2026078456-A1 · Mar 19, 2026 · US
Method for operating a smelting furnace installation
US-2026043099-A1 · Feb 12, 2026 · US
Use of tail gas made of the discharged gas of a reduction process of iron oxide-containing material
US-2026035758-A1 · Feb 5, 2026 · US
System and method for producing steel
US-12503735-B2 · Dec 23, 2025 · US
Method for producing reduced iron
US-12486548-B2 · Dec 2, 2025 · US
Biomass processing integrated with reduction of metal ores, systems for these processes, and products made therefrom
US-2025340960-A1 · Nov 6, 2025 · US
Method for the direct reduction of iron ore
US-2025283186-A1 · Sep 11, 2025 · US
Method of reducing iron ore powder
US-2025163525-A1 · May 22, 2025 · US
System and method for reducing ore using hydrogen as a reducing agent
US-2024336986-A1 · Oct 10, 2024 · US
Agglomerated ore and method for producing same
US-2024318279-A1 · Sep 26, 2024 · US
Device for manufacturing molten iron
US-12084731-B2 · Sep 10, 2024 · US
System and method for reducing ore using hydrogen as a reducing agent
US-12043874-B2 · Jul 23, 2024 · 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 reduced iron
US-2023167517-A1 · Jun 1, 2023 · US
Method for producing reduced iron
US-2023167516-A1 · Jun 1, 2023 · US
Method of operating blast furnace and blast furnace ancillary facility
US-2022380860-A1 · Dec 1, 2022 · US
System and method for producing steel
US-2022307096-A1 · Sep 29, 2022 · US
Process and system for steel and hydrogen production using recycled ferrous scrap and natural gas
US-2022275466-A1 · Sep 1, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B2100/28?
- CPC C21B2100/28 is the Cooperative Patent Classification code for “by separation.”
- How many patents are filed under CPC C21B2100/28 (by separation)?
- Our database includes 28 publications tagged with this CPC code.
- Is patent activity under CPC C21B2100/28 growing?
- Publication counts under this code: 4 in 2024 vs 5 in 2025 (latest complete years).