Coffee as a carbon source in the preparation of iron and ferro-alloys
US-2024175100-A1 · May 30, 2024 · US
This page is not indexed by search engines while we improve data quality.
in hearth-type furnaces
in hearth-type 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 | C21B11/08 |
| Official title | in hearth-type furnaces |
| Display label | in hearth-type furnaces |
| Total patents | 17 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 3 |
| 2017 | 4 |
| 2018 | 3 |
| 2019 | 1 |
| 2022 | 1 |
| 2024 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Apparatus for the production of molten iron
US-2022411888-A1 · Dec 29, 2022 · US
Production method of granular metallic iron
US-10407744-B2 · Sep 10, 2019 · US
Device for producing partially reduced iron
US-10155997-B2 · Dec 18, 2018 · US
Process for manufacturing reduced iron agglomerates
US-10144981-B2 · Dec 4, 2018 · US
Method and apparatus for treating iron-contained raw material using bath smelting furnace
US-2018087120-A1 · Mar 29, 2018 · US
Starting a smelting process
US-9771626-B2 · Sep 26, 2017 · US
Direct Smelting Process
US-2017081745-A1 · Mar 23, 2017 · US
Production method of granular metallic iron
US-2017073781-A1 · Mar 16, 2017 · US
Starting a smelting process
US-9551044-B2 · Jan 24, 2017 · US
Device for producing partially reduced iron
US-2016304977-A1 · Oct 20, 2016 · US
Method for manufacturing iron nuggets
US-2016237514-A1 · Aug 18, 2016 · US
Starting a smelting process
US-9309579-B2 · Apr 12, 2016 · US
Starting a smelting process
US-2015259758-A1 · Sep 17, 2015 · US
Method for producing metallic iron
US-2015203931-A1 · Jul 23, 2015 · US
Direct Smelting Process
US-2015038317-A1 · Feb 5, 2015 · US
Process for manufacturing reduced iron agglomerates
US-2015027275-A1 · Jan 29, 2015 · US