Process for heavy metal removal from iron- and steelmaking flue dust
US-2026043110-A1 · Feb 12, 2026 · US
Recycling of non-gaseous waste material
Recycling of non-gaseous waste material · 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 | C21B2200/00 |
| Official title | Recycling of non-gaseous waste material |
| Display label | Recycling of non-gaseous waste material |
| Total patents | 30 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 5 |
| 2023 | 3 |
| 2024 | 3 |
| 2025 | 5 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
A method for producing molten pig iron into an electrical smelting unit
US-2026022430-A1 · Jan 22, 2026 · US
A method of manufacturing molten pig iron into an electrical smelting unit
US-2026009095-A1 · Jan 8, 2026 · US
Production of iron
US-12509745-B2 · Dec 30, 2025 · US
Compositions and methods for improvement of blast furnace production
US-2025388992-A1 · Dec 25, 2025 · US
Biomass processing integrated with reduction of metal ores, systems for these processes, and products made therefrom
US-2025340960-A1 · Nov 6, 2025 · US
Method for melting direct reduced iron, solid iron and method for producing the same, material for civil engineering and construction and method for producing the same, and system for melting direct reduced iron
US-2025283185-A1 · Sep 11, 2025 · US
Facility for producing reduced iron and method for producing reduced iron
US-2025027178-A1 · Jan 23, 2025 · US
System and method for delivering fluidized powder based on flue gas carrying waste slag and instant cooling steel slag
US-12054795-B2 · Aug 6, 2024 · US
Production of iron
US-11959153-B2 · Apr 16, 2024 · US
System and method for delivering fluidized powder based on flue gas carrying waste slag and instant cooling steel slag
US-2024102118-A1 · Mar 28, 2024 · US
Method for operating a metallurgic plant for producing iron products
US-2023272495-A1 · Aug 31, 2023 · US
Production of Iron
US-2023002853-A1 · Jan 5, 2023 · US
Production of Iron
US-2023002852-A1 · Jan 5, 2023 · US
Operating method of an iron making installation and associated operating installation
US-11525167-B2 · Dec 13, 2022 · US
Production of iron
US-11479829-B2 · Oct 25, 2022 · US
Biocarbon pellets with adjustable grindability index
US-2022228080-A1 · Jul 21, 2022 · US
Processes for producing biocarbon pellets with adjustable grindability index
US-2022228081-A1 · Jul 21, 2022 · US
Reactivity-moderated biocarbon pellets
US-2022228082-A1 · Jul 21, 2022 · US
Plant complex for producing steel and a method for operating the plant complex
US-2021238700-A1 · Aug 5, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B2200/00?
- CPC C21B2200/00 is the Cooperative Patent Classification code for “Recycling of non-gaseous waste material.”
- How many patents are filed under CPC C21B2200/00 (Recycling of non-gaseous waste material)?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC C21B2200/00 growing?
- Publication counts under this code: 3 in 2024 vs 5 in 2025 (latest complete years).