System and method for producing steel
US-12503735-B2 · Dec 23, 2025 · US
Evacuating and treating of exhaust gases
Evacuating and treating of exhaust 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 | C21B7/002 |
| Official title | {Evacuating and treating of exhaust gases} |
| Display label | Evacuating and treating of exhaust gases |
| Total patents | 67 |
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 | 2 |
| 2016 | 11 |
| 2017 | 5 |
| 2018 | 6 |
| 2020 | 8 |
| 2021 | 2 |
| 2022 | 4 |
| 2023 | 7 |
| 2024 | 7 |
| 2025 | 13 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Production device for carbon material, production system for carbon material, carbon circulation system, production method for carbon material, and carbon circulation method
US-2025296062-A1 · Sep 25, 2025 · US
Process for reducing fossil co2 emissions
US-2025229224-A1 · Jul 17, 2025 · US
Reduction of a metal oxide-containing material on the basis of ammonia nh3
US-2025207211-A1 · Jun 26, 2025 · US
Method for producing molten pig iron
US-2025179594-A1 · Jun 5, 2025 · US
Blast furnace operation method
US-2025179593-A1 · Jun 5, 2025 · US
Process and apparatus for separating waste gas from a ferrous metal production unit
US-2025170521-A1 · May 29, 2025 · US
Steelmaking method and associated network of plants
US-2025034669-A1 · Jan 30, 2025 · 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
Operating method of a network of plants
US-2024263259-A1 · Aug 8, 2024 · US
Systems and methods for improved carbon capture associated with molten metal production
US-2024247327-A1 · Jul 25, 2024 · US
System and method for reducing ore using hydrogen as a reducing agent
US-12043874-B2 · Jul 23, 2024 · US
Method for operating a blast furnace plant
US-2024077255-A1 · Mar 7, 2024 · US
Method for producing pig iron in a shaft furnace
US-2024018615-A1 · Jan 18, 2024 · US
Method for operating a blast furnace installation
US-2023340628-A1 · Oct 26, 2023 · US
System network and method for operating a system network of this type for producing higher alcohols
US-2023219815-A1 · Jul 13, 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
Blast furnace slag granulation and waste heat recovery and utilization device and method
US-2023100959-A1 · Mar 30, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B7/002?
- CPC C21B7/002 is the Cooperative Patent Classification code for “Evacuating and treating of exhaust gases.”
- How many patents are filed under CPC C21B7/002 (Evacuating and treating of exhaust gases)?
- Our database includes 67 publications tagged with this CPC code.
- Is patent activity under CPC C21B7/002 growing?
- Publication counts under this code: 7 in 2024 vs 13 in 2025 (latest complete years).