Direct reduction of iron by hydrogen plasma in a rotary kiln reactor
US-2024110254-A1 · Apr 4, 2024 · US
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in rotary furnaces
in rotary 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 | C21B13/08 |
| Official title | in rotary furnaces |
| Display label | in rotary furnaces |
| Total patents | 13 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 3 |
| 2020 | 3 |
| 2023 | 2 |
| 2024 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Oxide ore smelting method
US-11608543-B2 · Mar 21, 2023 · US
Material treatment apparatus and process using hydrogen
US-2023063785-A1 · Mar 2, 2023 · US
Rotary bed-type electric furnace
US-10746467-B2 · Aug 18, 2020 · US
Rotary bed-type electric furnace
US-2020158434-A1 · May 21, 2020 · US
Reduced iron production method and device
US-10571193-B2 · Feb 25, 2020 · US
Rotary hearth furnace
US-10294535-B2 · May 21, 2019 · US
Oxide ore smelting method
US-2019119779-A1 · Apr 25, 2019 · US
Method for processing steelmaking dust, method for producing zinc, method for producing iron- and steelmaking raw material, and raw material of iron and steel
US-2019106767-A1 · Apr 11, 2019 · US
Method for smelting nickel oxide ore
US-10072313-B2 · Sep 11, 2018 · US
Reduced iron production method and device
US-2018017326-A1 · Jan 18, 2018 · US
Method for smelting nickel oxide ore
US-2017342514-A1 · Nov 30, 2017 · US
Rotary hearth furnace
US-2017198365-A1 · Jul 13, 2017 · US