Carburizer and carburization method using the same
US-2021404047-A1 · Dec 30, 2021 · US
Manufacture of steel in electric furnaces {(C21C5/005 takes precedence)}
Manufacture of steel in electric furnaces {(C21C5/005 takes precedence)} · 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 | C21C5/52 |
| Official title | Manufacture of steel in electric furnaces {(C21C5/005 takes precedence)} |
| Display label | Manufacture of steel in electric furnaces {(C21C5/005 takes precedence)} |
| Total patents | 185 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 11 |
| 2017 | 8 |
| 2018 | 8 |
| 2019 | 8 |
| 2020 | 7 |
| 2021 | 30 |
| 2022 | 11 |
| 2023 | 9 |
| 2024 | 33 |
| 2025 | 38 |
| 2026 | 14 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
High-carbon biogenic reagents and uses thereof
US-2021395631-A1 · Dec 23, 2021 · US
High-carbon biogenic reagents and uses thereof
US-2021388280-A1 · Dec 16, 2021 · US
High-carbon biogenic reagents and uses thereof
US-2021355399-A1 · Nov 18, 2021 · US
High-carbon biogenic reagents and uses thereof
US-2021355403-A1 · Nov 18, 2021 · US
Method for operating converter
US-11124849-B2 · Sep 21, 2021 · US
Temperature sensors
US-2021190603-A1 · Jun 24, 2021 · US
Spray cooling furnace electrodes with a cooling liquid that contains surfactants
US-2021176835-A1 · Jun 10, 2021 · US
Process for producing high-carbon biogenic reagents
US-10982161-B2 · Apr 20, 2021 · US
Smelting assembly for the production of steel
US-2021040573-A1 · Feb 11, 2021 · US
Processing method
US-2020354811-A1 · Nov 12, 2020 · US
Method for melting metal material in a melting plant and relative melting plant
US-10801083-B2 · Oct 13, 2020 · US
Methods and apparatus for enhancing the energy content of carbonaceous materials from pyrolysis
US-2020299599-A1 · Sep 24, 2020 · US
Method for operating melting/refining furnace and melting-refining furnace
US-2020165692-A1 · May 28, 2020 · US
Method for operating converter
US-2020157645-A1 · May 21, 2020 · US
Methods and apparatus for enhancing the energy content of carbonaceous materials from pyrolysis
US-10611977-B2 · Apr 7, 2020 · US
Heating device and heating method of torpedo car
US-2020017928-A1 · Jan 16, 2020 · US
Melting and refining furnace for cold iron source and method of operating melting and refining furnace
US-2019284652-A1 · Sep 19, 2019 · US
Method and carrier for transporting reductant such as coke into a metallurgical furnace and production method of the carrier
US-10337084-B2 · Jul 2, 2019 · US
Process for producing high-carbon biogenic reagents
US-2019194561-A1 · Jun 27, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21C5/52?
- CPC C21C5/52 is the Cooperative Patent Classification code for “Manufacture of steel in electric furnaces {(C21C5/005 takes precedence)}.”
- How many patents are filed under CPC C21C5/52 (Manufacture of steel in electric furnaces {(C21C5/005 takes precedence)})?
- Our database includes 185 publications tagged with this CPC code.
- Is patent activity under CPC C21C5/52 growing?
- Publication counts under this code: 33 in 2024 vs 38 in 2025 (latest complete years).