Biomass pyrolysis integrated with bio-reduction of metal ores, hydrogen production, and/or activated-carbon production
US-2025188565-A1 · Jun 12, 2025 · US
Injecting additional fuel or reducing agents
Injecting additional fuel or reducing agents · 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 | C21B5/001 |
| Official title | {Injecting additional fuel or reducing agents} |
| Display label | Injecting additional fuel or reducing agents |
| Total patents | 72 |
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 | 4 |
| 2016 | 7 |
| 2017 | 3 |
| 2018 | 6 |
| 2019 | 3 |
| 2021 | 2 |
| 2022 | 15 |
| 2023 | 7 |
| 2024 | 11 |
| 2025 | 11 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Steelmaking method and associated network of plants
US-2025034669-A1 · Jan 30, 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
Method for producing pig iron
US-2024167111-A1 · May 23, 2024 · US
Raw material particles for production of agglomerate, method for producing raw material particles for production of agglomerate, agglomerate, method for producing agglomerate, and method for producing reduced iron
US-2024167110-A1 · May 23, 2024 · US
Method for producing pig iron
US-2024167109-A1 · May 23, 2024 · US
Method for producing pig iron in a shaft furnace
US-2024018615-A1 · Jan 18, 2024 · US
Device to inject a reducing gas into a shaft furnace
US-2023366049-A1 · Nov 16, 2023 · US
Blast furnace for ironmaking production
US-2023366047-A1 · Nov 16, 2023 · US
Device to inject a reducing gas into a shaft furnace
US-2023366050-A1 · Nov 16, 2023 · US
Production method of pig iron
US-2023313328-A1 · Oct 5, 2023 · US
Steelmaking line and method of producing reduced iron
US-2023175084-A1 · Jun 8, 2023 · US
Solid carbon production device and solid carbon production method
US-2023150820-A1 · May 18, 2023 · US
Method of operating blast furnace and blast furnace ancillary facility
US-2023034442-A1 · Feb 2, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B5/001?
- CPC C21B5/001 is the Cooperative Patent Classification code for “Injecting additional fuel or reducing agents.”
- How many patents are filed under CPC C21B5/001 (Injecting additional fuel or reducing agents)?
- Our database includes 72 publications tagged with this CPC code.
- Is patent activity under CPC C21B5/001 growing?
- Publication counts under this code: 11 in 2024 vs 11 in 2025 (latest complete years).