Method of reducing iron ore powder
US-2025163525-A1 · May 22, 2025 · US
in shaft furnaces
in shaft furnaces · 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 | C21B13/02 |
| Official title | in shaft furnaces |
| Display label | in shaft furnaces |
| Total patents | 71 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 10 |
| 2017 | 5 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 4 |
| 2021 | 5 |
| 2022 | 2 |
| 2023 | 9 |
| 2024 | 14 |
| 2025 | 10 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for carburization of HDRI produced in H2 based direct reduction process
US-12180554-B2 · Dec 31, 2024 · US
Method for producing agglomerated raw material
US-2024425942-A1 · Dec 26, 2024 · US
Method for producing direct reduction iron
US-2024410027-A1 · Dec 12, 2024 · US
Ironmaking method
US-2024384364-A1 · Nov 21, 2024 · US
Method for operating a metallurgical plant for producing iron products
US-2024360526-A1 · Oct 31, 2024 · US
Agglomerated ore and method for producing same
US-2024318279-A1 · Sep 26, 2024 · US
Agglomerated ore assessing method and agglomerated ore
US-2024287631-A1 · Aug 29, 2024 · US
Pre-reduced pellet preparation apparatus and method based on grate-rotary kiln
US-2024279767-A1 · Aug 22, 2024 · US
A method for manufacturing direct reduced iron
US-2024263260-A1 · Aug 8, 2024 · US
A method for manufacturing direct reduced iron
US-2024254575-A1 · Aug 1, 2024 · US
Method for manufacturing direct reduced iron and dri manufacturing equipment
US-2024240275-A1 · Jul 18, 2024 · US
Method for manufacturing Direct Reduced Iron and DRI manufacturing equipment
US-2024240276-A1 · Jul 18, 2024 · US
Reduced iron production method and reduced iron production device
US-2024175101-A1 · May 30, 2024 · US
Smart hydrogen production for dri making
US-2024052441-A1 · Feb 15, 2024 · US
Co-production of hydrogen, carbon, electricity, and steel with carbon dioxide capture
US-2023349015-A1 · Nov 2, 2023 · US
Method for direct reduction using vent gas
US-11773459-B2 · Oct 3, 2023 · US
Modular direct reduction systems and associated methods
US-2023295755-A1 · Sep 21, 2023 · US
Hot Metal Production from DRI with Electric Arc Heating
US-2023287528-A1 · Sep 14, 2023 · US
Method and device for direct reduction with dry vent gas de-dusting
US-2023250499-A1 · Aug 10, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B13/02?
- CPC C21B13/02 is the Cooperative Patent Classification code for “in shaft furnaces.”
- How many patents are filed under CPC C21B13/02 (in shaft furnaces)?
- Our database includes 71 publications tagged with this CPC code.
- Is patent activity under CPC C21B13/02 growing?
- Publication counts under this code: 14 in 2024 vs 10 in 2025 (latest complete years).