A method of manufacturing of a steel product in several steelmaking units
US-2024132984-A1 · Apr 25, 2024 · 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 | C21B13/0073 |
| Official title | {Selection or treatment of the reducing gases} |
| Display label | Selection or treatment of the reducing gases |
| Total patents | 187 |
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 | 8 |
| 2016 | 7 |
| 2017 | 11 |
| 2018 | 7 |
| 2019 | 7 |
| 2020 | 5 |
| 2021 | 8 |
| 2022 | 14 |
| 2023 | 26 |
| 2024 | 48 |
| 2025 | 32 |
| 2026 | 14 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method and corresponding apparatus for producing iron from direct reduction of iron ore
US-2022396843-A1 · Dec 15, 2022 · US
Method for the direct reduction of iron ore
US-2022389528-A1 · Dec 8, 2022 · US
Process and system for steel and hydrogen production using recycled ferrous scrap and natural gas
US-2022275466-A1 · Sep 1, 2022 · US
Cooperative emission reduction method for sintering using energy-carrying composite gas medium
US-2022213565-A1 · Jul 7, 2022 · US
Method for direct reduction in a fluidized bed
US-2022145412-A1 · May 12, 2022 · US
Device for manufacturing molten iron
US-2022002826-A1 · Jan 6, 2022 · US
Method and apparatus for producing direct reduced iron utilizing a catalytical pretreatment of hydrocarbons as a source of reducing gas
US-11203791-B2 · Dec 21, 2021 · US
Methods and systems for syngas production and for efficient, flexible energy generation
US-11142832-B2 · Oct 12, 2021 · US
Method for Carburization of HDRI produced in H2 based Direct Reduction Process
US-2021246521-A1 · Aug 12, 2021 · US
Reduction gas extraction from saturated top gas
US-11078549-B2 · Aug 3, 2021 · US
Plant complex for pig iron production and a method for operating the plant complex
US-2021123110-A1 · Apr 29, 2021 · US
Process and system for steel and hydrogen production using recycled ferrous scrap and natural gas
US-2021062279-A1 · Mar 4, 2021 · US
Method and system for producing high-carbon DRI using syngas
US-10927424-B2 · Feb 23, 2021 · US
Method and apparatus for producing direct reduced iron utilizing a catalytical pretreatment of hydrocarbons as a source of reducing gas
US-2021032712-A1 · Feb 4, 2021 · US
Method and device for direct reduction with dry vent gas de-dusting
US-2020332377-A1 · Oct 22, 2020 · US
Method for direct reduction using vent gas
US-2020318206-A1 · Oct 8, 2020 · US
Reduction gas extraction from saturated top gas
US-2020216921-A1 · Jul 9, 2020 · US
Systems and methods for lowering the reduction of iron ore energy
US-10704121-B1 · Jul 7, 2020 · US
Multi-stage suspension magnetizing roasting-magnetic separation system device and method for refractory iron ore
US-10543491-B2 · Jan 28, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B13/0073?
- CPC C21B13/0073 is the Cooperative Patent Classification code for “Selection or treatment of the reducing gases.”
- How many patents are filed under CPC C21B13/0073 (Selection or treatment of the reducing gases)?
- Our database includes 187 publications tagged with this CPC code.
- Is patent activity under CPC C21B13/0073 growing?
- Publication counts under this code: 48 in 2024 vs 32 in 2025 (latest complete years).