Method for producing reduced iron
US-12595522-B2 · Apr 7, 2026 · US
Controlling the physical properties of the gas, e.g. pressure or temperature
Controlling the physical properties of the gas, e.g. pressure or temperature · 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 | C21B2100/64 |
| Official title | Controlling the physical properties of the gas, e.g. pressure or temperature |
| Display label | Controlling the physical properties of the gas, e.g. pressure or temperature |
| Total patents | 61 |
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 | 5 |
| 2017 | 1 |
| 2018 | 3 |
| 2019 | 1 |
| 2020 | 4 |
| 2021 | 1 |
| 2022 | 7 |
| 2023 | 8 |
| 2024 | 11 |
| 2025 | 11 |
| 2026 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Gas production apparatus, gas production system, steel production system, chemical manufacturing system, and gas production method with reduced carbon dioxide emission
US-12582941-B2 · Mar 24, 2026 · US
Hydrogen release/storage system, hydrogen release/storage method, ammonia production equipment, gas turbine, fuel cell, and steel mill
US-12582953-B2 · Mar 24, 2026 · US
Hot Metal Production from DRI with Electric Arc Heating
US-2026071288-A1 · Mar 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
Steelmaking line and method of producing reduced iron
US-12534770-B2 · Jan 27, 2026 · US
Method and corresponding apparatus for producing iron from direct reduction of iron ore
US-12509738-B2 · Dec 30, 2025 · US
Hydrogen release and storage system, hydrogen release and storage method, ammonia production apparatus, gas turbine, fuel cell, and steel mill
US-12503362-B2 · Dec 23, 2025 · US
System and method for producing steel
US-12503735-B2 · Dec 23, 2025 · US
Hot metal production from DRI with electric arc heating
US-12497668-B2 · Dec 16, 2025 · US
Method for producing reduced iron
US-12486548-B2 · Dec 2, 2025 · US
Iron production with synthesis gas feed and carbon capture
US-2025297334-A1 · Sep 25, 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
Systems and methods for improved carbon capture associated with molten metal production
US-2025188552-A1 · Jun 12, 2025 · US
Systems and methods for improved carbon capture associated with molten metal production
US-12258640-B2 · Mar 25, 2025 · US
Method for operating a steelworks
US-2025092477-A1 · Mar 20, 2025 · US
Direct reduced iron system and method
US-2024401160-A1 · Dec 5, 2024 · US
Enrichment of Iron from Bauxite Waste in Chemical Looping Combustion
US-2024360525-A1 · Oct 31, 2024 · US
Method for producing an iron melt
US-2024344155-A1 · Oct 17, 2024 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B2100/64?
- CPC C21B2100/64 is the Cooperative Patent Classification code for “Controlling the physical properties of the gas, e.g. pressure or temperature.”
- How many patents are filed under CPC C21B2100/64 (Controlling the physical properties of the gas, e.g. pressure or temperature)?
- Our database includes 61 publications tagged with this CPC code.
- Is patent activity under CPC C21B2100/64 growing?
- Publication counts under this code: 11 in 2024 vs 11 in 2025 (latest complete years).