Separation of nucleic acid component compounds on zwitterionic stationary phases
US-12584159-B2 · Mar 24, 2026 · US
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Amphoteric or zwitterionic ion-exchanger
Amphoteric or zwitterionic ion-exchanger · 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 | B01D15/364 |
| Official title | {Amphoteric or zwitterionic ion-exchanger} |
| Display label | Amphoteric or zwitterionic ion-exchanger |
| Total patents | 23 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 6 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 3 |
| 2022 | 4 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Sulfonamide based anion exchange resins
US-12285704-B2 · Apr 29, 2025 · US
Process for separation and quantification of non-ionic surfactant
US-2024352061-A1 · Oct 24, 2024 · US
Method for the separation of anionic, cationic, neutral and zwitterionic arsenic species
US-2024198255-A1 · Jun 20, 2024 · US
Hybrid thermal - chromatographic system for simultaneous mineral purification and desalination of saline waters
US-2023226462-A1 · Jul 20, 2023 · US
Separation of nucleic acid component compounds on zwitterionic stationary phases
US-2022389480-A1 · Dec 8, 2022 · US
Externally modulated variable affinity chromatography
US-2022379237-A1 · Dec 1, 2022 · US
Hydrolytically stable zwitterionic chromatographic materials
US-2022362741-A1 · Nov 17, 2022 · US
Process for separation and purification of a dicarboxylic acid containing mixture
US-11453636-B2 · Sep 27, 2022 · US
Sulfonamide based anion exchange resins
US-2021308599-A1 · Oct 7, 2021 · US
Process for making esters of 2,5-furandicarboxylic acid
US-11078174-B2 · Aug 3, 2021 · US
Process for separation and purification of a dicarboxylic acid containing mixture
US-2021147332-A1 · May 20, 2021 · US
Process for making esters of 2,5-furandicarboxylic acid
US-2020102280-A1 · Apr 2, 2020 · US
Process for making acrylic acid from dextrose
US-10308582-B2 · Jun 4, 2019 · US
Sulfonamide based anion exchange resins
US-2019126167-A1 · May 2, 2019 · US
Exosome recovery methods with low molecular weight organic zwitterions
US-9927427-B2 · Mar 27, 2018 · US
Process for making acrylic acid from dextrose
US-2017362156-A1 · Dec 21, 2017 · US
Packing material for hydrophilic interaction chromatography
US-2016367910-A1 · Dec 22, 2016 · US
Separation of propionic acid from acrylic acid
US-9493393-B2 · Nov 15, 2016 · US
Exosome recovery methods with low molecular weight organic zwitterions
US-2016266097-A1 · Sep 15, 2016 · US