Method for stabilization of reducing slag
US-2025305074-A1 · Oct 2, 2025 · US
Physical or chemical treatment of slags
Physical or chemical treatment of slags · 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 | C21B2400/02 |
| Official title | Physical or chemical treatment of slags |
| Display label | Physical or chemical treatment of slags |
| Total patents | 25 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 1 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 6 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods for recovering a target metal from iron or steel slag using at least one of a carbothermic reduction process and a pyro-hydrometallurgical process
US-2025305086-A1 · Oct 2, 2025 · US
Methods for recovering a target metal from iron or steel slag using at least one of a carbothermic reduction process and a pyro-hydrometallurgical process
US-12305260-B2 · May 20, 2025 · US
Processing method
US-12168814-B2 · Dec 17, 2024 · US
Method of extracting and carbonating calcium from alkaline industrial waste or by-product materials
US-12157675-B2 · Dec 3, 2024 · US
Method for producing slag having a desired quality
US-2024376559-A1 · Nov 14, 2024 · US
Molten pig iron manufacturing method
US-2024368716-A1 · Nov 7, 2024 · US
Pyrometallurgical process for recovering nickel, manganese, and cobalt
US-11926884-B2 · Mar 12, 2024 · US
Method and apparatus for direct drying of inorganic sludge with drum drawing process
US-11891318-B2 · Feb 6, 2024 · US
Process for modifying steel slag through acidification and carbonization coupling
US-11572307-B1 · Feb 7, 2023 · US
Pyrometallurgical process for recovering nickel, manganese, and cobalt
US-2023002856-A1 · Jan 5, 2023 · US
Methods for recovering a target metal from iron or steel slag using at least one of a carbothermic reduction process and a pyro-hydrometallurgical process
US-2022364200-A1 · Nov 17, 2022 · US
Method of dechromizing molten iron and method of manufacturing phosphate fertilizer raw material
US-11254992-B2 · Feb 22, 2022 · US
Method of extracting and carbonating calcium from alkaline industrial waste or by-product materials
US-2022024778-A1 · Jan 27, 2022 · US
Method and apparatus for direct drying of inorganic sludge with drum drawing process
US-2021347665-A1 · Nov 11, 2021 · US
Processing method
US-2020354811-A1 · Nov 12, 2020 · US
Method of dechromizing molten iron and method of manufacturing phosphate fertilizer raw material
US-2020239973-A1 · Jul 30, 2020 · US
Method and system for forming carbonate from steel slag
US-10526669-B2 · Jan 7, 2020 · US
Method of renovating and afforesting slag mountain with humic acid substance
US-10493507-B1 · Dec 3, 2019 · US
Method for recovering calcium-containing solid component from steelmaking slag and recovered solid component
US-10287652-B2 · May 14, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B2400/02?
- CPC C21B2400/02 is the Cooperative Patent Classification code for “Physical or chemical treatment of slags.”
- How many patents are filed under CPC C21B2400/02 (Physical or chemical treatment of slags)?
- Our database includes 25 publications tagged with this CPC code.
- Is patent activity under CPC C21B2400/02 growing?
- Publication counts under this code: 6 in 2024 vs 3 in 2025 (latest complete years).