Impurity acquisition method and impurity acquisition apparatus for acquiring metal impurities in organic solvents
US-2026014494-A1 · Jan 15, 2026 · US
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Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties (ion-exchange chromatography processes B01D15/36)
Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties (ion-exchange chromatography processes B01D15/36) · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01J39/00 |
| Official title | Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties (ion-exchange chromatography processes B01D15/36) |
| Display label | Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties (ion-exchange chromatography processes B01D15/36) |
| Total patents | 11 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 1 |
| 2017 | 3 |
| 2018 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multi-dimension, multi-mode chromatography methods for producing high purity, high yield lithium, cobalt, nickel, and manganese salts from waste lithium-ion batteries and other feedstocks
US-2025219178-A1 · Jul 3, 2025 · US
Liquid absorber, liquid absorbing unit, and liquid ejection apparatus
US-11167554-B2 · Nov 9, 2021 · US
Liquid absorber, liquid absorbing unit, and liquid ejection apparatus
US-2020290358-A1 · Sep 17, 2020 · US
Cyclopolymeric zwitterion-dianionic resin and synthesis and uses thereof
US-9856334-B2 · Jan 2, 2018 · US
Regeneratable ion exchange material for reducing the amount of CO2
US-9724641-B2 · Aug 8, 2017 · US
Cyclopolymeric zwitterion-dianionic resin and synthesis and uses thereof
US-2017197847-A1 · Jul 13, 2017 · US
Regeneratable ion exchange material for reducing the amount of co2
US-2017197203-A1 · Jul 13, 2017 · US
Adsorptive filter medium
US-9242202-B2 · Jan 26, 2016 · US
Regeneratable ion exchange material for reducing the amount of co2
US-2015165372-A1 · Jun 18, 2015 · US
Adsorptive filter medium
US-2015053080-A1 · Feb 26, 2015 · US