Steelmaking line and method of producing reduced iron
US-12534770-B2 · Jan 27, 2026 · US
Selection or treatment of the reducing gases
Selection or treatment of the reducing gases · 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 | C21B2005/005 |
| Official title | {Selection or treatment of the reducing gases} |
| Display label | Selection or treatment of the reducing gases |
| Total patents | 48 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 3 |
| 2020 | 1 |
| 2021 | 2 |
| 2022 | 12 |
| 2023 | 5 |
| 2024 | 8 |
| 2025 | 11 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Solid carbon production device and solid carbon production method
US-12528701-B2 · Jan 20, 2026 · US
Method and corresponding apparatus for producing iron from direct reduction of iron ore
US-12509738-B2 · Dec 30, 2025 · US
Hydrogen-rich blast furnace ironmaking system based onmass-energy conversion, and production control method therefor
US-2025257415-A1 · Aug 14, 2025 · US
Method of operating blast furnace and blast furnace ancillary facility
US-12365953-B2 · Jul 22, 2025 · US
Reduction of a metal oxide-containing material on the basis of ammonia nh3
US-2025207211-A1 · Jun 26, 2025 · US
Biomass pyrolysis integrated with bio-reduction of metal ores, hydrogen production, and/or activated-carbon production
US-2025188565-A1 · Jun 12, 2025 · US
Blast furnace operation method
US-2025179593-A1 · Jun 5, 2025 · US
Method for operating a steelworks
US-2025092477-A1 · Mar 20, 2025 · US
Steelmaking method and associated network of plants
US-2025034669-A1 · Jan 30, 2025 · US
Steelmaking method and associated network of plants
US-2025034668-A1 · Jan 30, 2025 · US
Injection Regulation and Control Device and Method for Blast Furnace Low-Carbon Smelting
US-2025027176-A1 · Jan 23, 2025 · US
Steelmaking method and associated network of plants
US-2025019782-A1 · Jan 16, 2025 · US
Blast furnace operation method
US-12180555-B2 · Dec 31, 2024 · US
Ironmaking method
US-2024384364-A1 · Nov 21, 2024 · US
System and method for reducing ore using hydrogen as a reducing agent
US-2024336986-A1 · Oct 10, 2024 · US
Method for producing steel in an integrated metallurgical plant
US-2024271232-A1 · Aug 15, 2024 · US
Method for operating a blast furnace installation
US-2024263258-A1 · Aug 8, 2024 · US
System and method for reducing ore using hydrogen as a reducing agent
US-12043874-B2 · Jul 23, 2024 · US
Direct reduced iron system and method using synthetic combustion air
US-2024218474-A1 · Jul 4, 2024 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B2005/005?
- CPC C21B2005/005 is the Cooperative Patent Classification code for “Selection or treatment of the reducing gases.”
- How many patents are filed under CPC C21B2005/005 (Selection or treatment of the reducing gases)?
- Our database includes 48 publications tagged with this CPC code.
- Is patent activity under CPC C21B2005/005 growing?
- Publication counts under this code: 8 in 2024 vs 11 in 2025 (latest complete years).