Efficient and stable magnetic nanofiber membrane and preparation method and use thereof
US-12427485-B2 · Sep 30, 2025 · US
Devices for applying magnetic or electric fields
Devices for applying magnetic or electric fields · 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 | C02F2201/48 |
| Official title | Devices for applying magnetic or electric fields |
| Display label | Devices for applying magnetic or electric fields |
| Total patents | 61 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 7 |
| 2017 | 11 |
| 2018 | 10 |
| 2019 | 2 |
| 2020 | 5 |
| 2021 | 3 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Systems and Methods for Water Purification
US-2025154031-A1 · May 15, 2025 · US
Methods and systems for removing contaminants and nutrients from a fluid
US-2025051195-A1 · Feb 13, 2025 · US
Water treatment apparatus
US-2024417289-A1 · Dec 19, 2024 · US
Oil-water mixture treatment device and method
US-2024300832-A1 · Sep 12, 2024 · US
Method and devices for cleaning a fluid containing magnetic particles
US-2024166539-A1 · May 23, 2024 · US
Efficient and stable magnetic nanofiber membrane and preparation method and use thereof
US-2023285905-A1 · Sep 14, 2023 · US
Separator device
US-11660618-B2 · May 30, 2023 · US
Water treatment apparatus and water treatment method
US-11358884-B2 · Jun 14, 2022 · US
Devices and methods for treatment of wastewater
US-2022169543-A1 · Jun 2, 2022 · US
Purification apparatus with electrodeless bulb and methods of operation
US-11299405-B2 · Apr 12, 2022 · US
Magnetizing Device and Method for Preparing Magnetized Water for Dust Fall of Underground Coal Mine
US-2021253453-A1 · Aug 19, 2021 · US
CDI-type water treatment method
US-11084740-B2 · Aug 10, 2021 · US
Pulsed electric field for drinking water disinfection
US-10941060-B2 · Mar 9, 2021 · US
Water treatment apparatus and water treatment method
US-2020392024-A1 · Dec 17, 2020 · US
Separator device
US-2020179951-A1 · Jun 11, 2020 · US
Separator device
US-10668487-B2 · Jun 2, 2020 · US
Pulsed electric field for drinking water disinfection
US-10577264-B2 · Mar 3, 2020 · US
Water treatment apparatus and water treatment method
US-10577261-B2 · Mar 3, 2020 · US
Purification apparatus with electrodeless bulb and methods of operation
US-2019092652-A1 · Mar 28, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F2201/48?
- CPC C02F2201/48 is the Cooperative Patent Classification code for “Devices for applying magnetic or electric fields.”
- How many patents are filed under CPC C02F2201/48 (Devices for applying magnetic or electric fields)?
- Our database includes 61 publications tagged with this CPC code.
- Is patent activity under CPC C02F2201/48 growing?
- Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).