Carbon-negative metallurgical products
US-12398435-B2 · Aug 26, 2025 · US
Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel {or stainless steel}
Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel {or stainless steel} · 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 | C21C5/00 |
| Official title | Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel {or stainless steel} |
| Display label | Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel {or stainless steel} |
| Total patents | 25 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 1 |
| 2019 | 2 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 7 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Carbon-negative metallurgical products
US-2025084495-A1 · Mar 13, 2025 · US
Carbon-negative metallurgical products
US-2024294997-A1 · Sep 5, 2024 · US
Method of manufacturing steel
US-2024229174-A9 · Jul 11, 2024 · US
A method of manufacturing of a steel product in several steelmaking units
US-2024229175-A9 · Jul 11, 2024 · US
Manufacturing method of a steel product
US-2024229171-A9 · Jul 11, 2024 · US
A method of manufacturing of a steel product in several steelmaking units
US-2024132984-A1 · Apr 25, 2024 · US
Manufacturing method of a steel product
US-2024132981-A1 · Apr 25, 2024 · US
Method of manufacturing steel
US-2024132983-A1 · Apr 25, 2024 · US
Carbon-negative metallurgical products
US-11851723-B2 · Dec 26, 2023 · US
Carbon-negative metallurgical products
US-2023407421-A1 · Dec 21, 2023 · US
Carbon-negative metallurgical products
US-2022267869-A1 · Aug 25, 2022 · US
Carbon-negative metallurgical products
US-2022259684-A1 · Aug 18, 2022 · US
Metallurgical container
US-10451349-B2 · Oct 22, 2019 · US
Method for operating a shaft furnace
US-10386119-B2 · Aug 20, 2019 · US
Immersion device for molten metal and steelmaking method
US-9909810-B2 · Mar 6, 2018 · US
Method of recovering Fe from steel-making slag
US-9650688-B2 · May 16, 2017 · US
Metallurgical container
US-2017102184-A1 · Apr 13, 2017 · US
Apparatus and method to feed and preheat a metal charge to a melting furnace
US-9599400-B2 · Mar 21, 2017 · US
Method for operating a shaft furnace
US-2017016673-A1 · Jan 19, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21C5/00?
- CPC C21C5/00 is the Cooperative Patent Classification code for “Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel {or stainless steel}.”
- How many patents are filed under CPC C21C5/00 (Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel {or stainless steel})?
- Our database includes 25 publications tagged with this CPC code.
- Is patent activity under CPC C21C5/00 growing?
- Publication counts under this code: 7 in 2024 vs 2 in 2025 (latest complete years).