Method for the treatment of iron-containing sludge
US-11519053-B2 · Dec 6, 2022 · US
Working-up flue dust
Working-up flue dust · 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 | C22B7/02 |
| Official title | Working-up flue dust |
| Display label | Working-up flue dust |
| Total patents | 99 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 6 |
| 2017 | 5 |
| 2018 | 6 |
| 2019 | 9 |
| 2020 | 8 |
| 2021 | 11 |
| 2022 | 13 |
| 2023 | 11 |
| 2024 | 13 |
| 2025 | 8 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method and apparatus for producing vanadium compound, and method and apparatus for producing redox-flow battery electrolyte
US-2022364204-A1 · Nov 17, 2022 · US
Desulfurisation of lead-containing waste
US-2022325376-A1 · Oct 13, 2022 · US
Process to recover alkali from a metal oxide/hydroxide containing material
US-2022228236-A1 · Jul 21, 2022 · US
Pyro-metallurgical process in a rotary kiln
US-2022178001-A1 · Jun 9, 2022 · US
Process for making modified dtpa-associated organosilica media for use in solid-liquid extraction of rare earth elements
US-2022145422-A1 · May 12, 2022 · US
Method for recovering a minor metal and/or rare-earth metal
US-11299796-B2 · Apr 12, 2022 · US
Methods for recovery of rare earth elements from coal
US-11279988-B2 · Mar 22, 2022 · US
Recycling of lead-containing waste
US-2022081315-A1 · Mar 17, 2022 · US
Method of pretreatment and bromine recovery of PCB incineration ash
US-11198615-B2 · Dec 14, 2021 · US
Method for the treatment of iron-containing sludge
US-2021371953-A1 · Dec 2, 2021 · US
Preparation of rare earth metals and other chemicals from industrial waste coal ash
US-11186894-B2 · Nov 30, 2021 · US
Methods and apparatus for separation of rare earth elements from coal ash
US-2021347652-A1 · Nov 11, 2021 · US
A Method for Enriching Precious Metals from Printed Circuit Board Incineration Ash from Molten Pool by Circulating Chlorination
US-2021324496-A1 · Oct 21, 2021 · US
Exhaust gas treatment system
US-11135543-B2 · Oct 5, 2021 · US
Process for recovering non-ferrous metals from industrial mineral residues
US-2021292869-A1 · Sep 23, 2021 · US
Method for co-processing of waste incineration fly ash and chromium slag in landfill
US-2021245211-A1 · Aug 12, 2021 · US
Methods and compositions for extraction of rare earth elements from coal ash
US-2021102273-A1 · Apr 8, 2021 · US
Granulated material, method for producing granulated material, and method for producing sintered ore
US-2021087652-A1 · Mar 25, 2021 · US
Method of recovering bromide from bromine-containing smelting ash
US-10954125-B2 · Mar 23, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C22B7/02?
- CPC C22B7/02 is the Cooperative Patent Classification code for “Working-up flue dust.”
- How many patents are filed under CPC C22B7/02 (Working-up flue dust)?
- Our database includes 99 publications tagged with this CPC code.
- Is patent activity under CPC C22B7/02 growing?
- Publication counts under this code: 13 in 2024 vs 8 in 2025 (latest complete years).