Method of operating an electric arc furnace and steel mill
US-12584182-B2 · Mar 24, 2026 · US
Interaction of exhaust gases produced during the manufacture of iron or steel with other processes
Interaction of exhaust gases produced during the manufacture of iron or steel with other processes · 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 | C21B2100/80 |
| Official title | Interaction of exhaust gases produced during the manufacture of iron or steel with other processes |
| Display label | Interaction of exhaust gases produced during the manufacture of iron or steel with other processes |
| Total patents | 33 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2017 | 1 |
| 2018 | 3 |
| 2020 | 5 |
| 2021 | 1 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 6 |
| 2025 | 10 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Steelmaking line and method of producing reduced iron
US-12534770-B2 · Jan 27, 2026 · US
Method for the direct reduction of iron ore
US-2025283186-A1 · Sep 11, 2025 · US
Reduction of a metal oxide-containing material on the basis of ammonia nh3
US-2025207211-A1 · Jun 26, 2025 · US
Production of carbon dioxide and ammonia from residual gases in the steel and metal industries
US-12325632-B2 · Jun 10, 2025 · US
Biomass direct reduced iron
US-2025179596-A1 · Jun 5, 2025 · US
Method of reducing iron ore powder
US-2025163525-A1 · May 22, 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
Steelmaking method and associated network of plants
US-2025019782-A1 · Jan 16, 2025 · US
Cooperative emission reduction method for sintering using energy-carrying composite gas medium
US-12195822-B2 · Jan 14, 2025 · US
Method for operating a blast furnace plant
US-2024400384-A1 · Dec 5, 2024 · US
Method for operating a metallurgical plant for producing iron products
US-2024360526-A1 · Oct 31, 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
Method of operating an electric arc furnace and steel mill
US-2024191314-A1 · Jun 13, 2024 · US
Smart hydrogen production for dri making
US-2024052441-A1 · Feb 15, 2024 · 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
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B2100/80?
- CPC C21B2100/80 is the Cooperative Patent Classification code for “Interaction of exhaust gases produced during the manufacture of iron or steel with other processes.”
- How many patents are filed under CPC C21B2100/80 (Interaction of exhaust gases produced during the manufacture of iron or steel with other processes)?
- Our database includes 33 publications tagged with this CPC code.
- Is patent activity under CPC C21B2100/80 growing?
- Publication counts under this code: 6 in 2024 vs 10 in 2025 (latest complete years).