Water-soluble chelating polymer and method for producing same
US-2025135449-A1 · May 1, 2025 · US
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of iron or manganese
of iron or manganese · 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 | C02F1/64 |
| Official title | of iron or manganese |
| Display label | of iron or manganese |
| Total patents | 17 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 1 |
| 2018 | 1 |
| 2020 | 3 |
| 2021 | 1 |
| 2022 | 2 |
| 2024 | 3 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Materials for treating acidic mine wastewater and preparation method and use thereof
US-2025128966-A1 · Apr 24, 2025 · US
Produced water treatment for direct injection using mechanically assisted forward osmosis
US-2024228333-A9 · Jul 11, 2024 · US
Produced water treatment for direct injection using mechanically assisted forward osmosis
US-2024132379-A1 · Apr 25, 2024 · US
Method for producing lithium hydroxide
US-2024051838-A1 · Feb 15, 2024 · US
Selective removal of charged species
US-2022356088-A1 · Nov 10, 2022 · US
Water treatment apparatus and water treatment method
US-11358884-B2 · Jun 14, 2022 · US
Process for treatment of wastewater
US-11148961-B2 · Oct 19, 2021 · US
Water treatment apparatus and water treatment method
US-2020392024-A1 · Dec 17, 2020 · US
Filtration aid and filtration treatment method
US-10850995-B2 · Dec 1, 2020 · US
Process for treatment of wastewater
US-2020071197-A1 · Mar 5, 2020 · US
Filtration Aid and Filtration Treatment Method
US-2018111110-A1 · Apr 26, 2018 · US
Process for purification of diphenyl carbonate for the manufacturing of high quality polycarbonate
US-9732028-B2 · Aug 15, 2017 · US
Methods for treating a ferrous metal substrate
US-9428410-B2 · Aug 30, 2016 · US
Method for regenerating plating solution
US-9249511-B2 · Feb 2, 2016 · US
Method for regenerating plating solution
US-2015345024-A1 · Dec 3, 2015 · US
Drainage treatment system and combined power generation facility
US-2015203392-A1 · Jul 23, 2015 · US