Dual-layer membrane and method for preparing same
US-11850555-B2 · Dec 26, 2023 · US
by pervaporation
by pervaporation · 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 | C02F1/448 |
| Official title | {by pervaporation} |
| Display label | by pervaporation |
| Total patents | 87 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 6 |
| 2017 | 6 |
| 2018 | 6 |
| 2019 | 5 |
| 2020 | 10 |
| 2021 | 5 |
| 2022 | 9 |
| 2023 | 12 |
| 2024 | 7 |
| 2025 | 9 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System and method for reclaiming solvent
US-2023347291-A1 · Nov 2, 2023 · US
Dual-layer membrane
US-2023256397-A1 · Aug 17, 2023 · US
Phenyl-modified polydimethylsiloxane (pdms) separation membrane, fabrication method thereof, and use thereof in separation of aromatic compound
US-2023129752-A1 · Apr 27, 2023 · US
Systems and methods for removing or reducing water in mixtures that include t-butyl hydroperoxide
US-2023105219-A1 · Apr 6, 2023 · US
High-flux water permeable membranes
US-2023060093-A1 · Feb 23, 2023 · US
Purification system, purification method, membrane separation device, and solvent manufacturing method
US-2022401884-A1 · Dec 22, 2022 · US
Device for continuous seawater desalination and method thereof
US-2022220006-A1 · Jul 14, 2022 · US
Electro oxidation membrane evaporator
US-11365137-B2 · Jun 21, 2022 · US
Solar-thermal membrane for dewatering aqueous organic-acid solutions
US-2022184557-A1 · Jun 16, 2022 · US
System and Process for Hybrid Membrane Distillation-Pervaporation
US-2022176321-A1 · Jun 9, 2022 · US
Thermoelectric power generation and mineral extraction from brines
US-11316089-B2 · Apr 26, 2022 · US
Self-supporting highly moisture-permeable heat-insulating aerogel film and preparation method thereof
US-11285442-B2 · Mar 29, 2022 · US
Composite ionomer membrane tubing modules and system and methods incorporating same
US-11273413-B2 · Mar 15, 2022 · US
Cms membrane, method for the production thereof and use thereof
US-2022032237-A1 · Feb 3, 2022 · US
Dual-layer membrane and method for preparing same
US-2021308627-A1 · Oct 7, 2021 · US
Uio-66-nh2 doped organosilicon high salinity wastewater treatment membrane and a preparation method thereof
US-2021260535-A1 · Aug 26, 2021 · US
Methods and systems for separation of chloramines in aqueous solutions
US-11084738-B2 · Aug 10, 2021 · US
Systems and Methods for Measuring Composition of Water
US-2021181167-A1 · Jun 17, 2021 · US
Use of nanoporous carbon membranes for separating aqueous/organic mixtures
US-2021008504-A1 · Jan 14, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F1/448?
- CPC C02F1/448 is the Cooperative Patent Classification code for “by pervaporation.”
- How many patents are filed under CPC C02F1/448 (by pervaporation)?
- Our database includes 87 publications tagged with this CPC code.
- Is patent activity under CPC C02F1/448 growing?
- Publication counts under this code: 7 in 2024 vs 9 in 2025 (latest complete years).