Sorbent membranes with conductive layer for efficient sorbent regeneration
US-2025108327-A1 · Apr 3, 2025 · US
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Esters of inorganic acids, e.g. cellulose nitrate
Esters of inorganic acids, e.g. cellulose nitrate · 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 | B01D71/20 |
| Official title | Esters of inorganic acids, e.g. cellulose nitrate |
| Display label | Esters of inorganic acids, e.g. cellulose nitrate |
| Total patents | 15 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 2 |
| 2019 | 1 |
| 2020 | 1 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Membrane for microbiological analysis
US-2025011829-A1 · Jan 9, 2025 · US
Intercalated thin films and methods for their preparation and use
US-2024367995-A1 · Nov 7, 2024 · US
Ultra-thin film of thermosetting resin
US-2024337026-A1 · Oct 10, 2024 · US
Nitrocellulose papers and methods of production and use
US-2023366151-A1 · Nov 16, 2023 · US
Filtration membrane and method of production thereof
US-2022274064-A1 · Sep 1, 2022 · US
Method for separating microplastics from animal excrement
US-11360006-B2 · Jun 14, 2022 · US
Method for separating microplastics from animal excrement
US-2020400536-A1 · Dec 24, 2020 · US
Sulfated cellulose hydrate membrane, method for producing same, and use of the membrane as an adsorption membrane for a virus purification process
US-10253299-B2 · Apr 9, 2019 · US
Sulfated Cellulose Hydrate Membrane, Method for Producing Same, and Use of the Membrane as an Adsorption Membrane for a Virus Purification Process
US-2016257941-A1 · Sep 8, 2016 · US
Crosslinked cellulosic membranes
US-9254466-B2 · Feb 9, 2016 · US
Crosslinked cellulosic membranes
US-2015375177-A1 · Dec 31, 2015 · US
Apparatus for producing surface enhanced membrane
US-9108159-B2 · Aug 18, 2015 · US
Dewatering system for increasing the combined cycle efficiency of a coal powerplant
US-2015175919-A1 · Jun 25, 2015 · US
Dewatering system and process for increasing the combined cycle efficiency of a coal powerplant
US-8968430-B2 · Mar 3, 2015 · US