Method of forming an electronic device on a flexible substrate
US-12585183-B2 · Mar 24, 2026 · US
Cellulose derivatives
Cellulose derivatives · 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 | B01D71/12 |
| Official title | Cellulose derivatives |
| Display label | Cellulose derivatives |
| Total patents | 62 |
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 | 11 |
| 2016 | 6 |
| 2017 | 6 |
| 2018 | 7 |
| 2019 | 6 |
| 2020 | 6 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 1 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Composite membrane comprising highly permeable gutter layer and method for preparing same
US-12420240-B2 · Sep 23, 2025 · US
Fluorine-free hydrophobic permeable material
US-2024327598-A1 · Oct 3, 2024 · US
Zeolite membrane and preparation method thereof
US-12011693-B2 · Jun 18, 2024 · US
Hydrophilic porous membrane and method for producing hydrophilic porous membrane
US-12005401-B2 · Jun 11, 2024 · US
Porous membrane and filter cartridge
US-11819807-B2 · Nov 21, 2023 · US
Composite membrane comprising highly permeable gutter layer and method for preparing same
US-2023271144-A1 · Aug 31, 2023 · US
Cellulose-based ion-exchange membrane, production method for same, exosome purification device, and exosome purification method
US-2023158483-A1 · May 25, 2023 · US
Storage and delivery vessels and related methods
US-2023080027-A1 · Mar 16, 2023 · US
Liquid purification membrane including carbonaceous materials and methods of forming them
US-2022323912-A1 · Oct 13, 2022 · US
Porous membrane, production method therefor, separation membrane, layered module, and gas permeation module
US-2022288538-A1 · Sep 15, 2022 · US
Zeolite membrane and preparation method thereof
US-2022219126-A1 · Jul 14, 2022 · US
Method for producing composition for forming gas separation membrane active layer, composition for forming gas separation membrane active layer produced by same, method for manufacturing gas separation membrane, and gas separation membrane
US-11198102-B2 · Dec 14, 2021 · US
Cell separation filter, filtering device, and manufacturing method for cell separation filter
US-2021380928-A1 · Dec 9, 2021 · US
Hydrophilic porous membrane and method for producing hydrophilic porous membrane
US-2021370238-A1 · Dec 2, 2021 · US
Method for producing composition for forming gas separation membrane active layer, composition for forming gas separation membrane active layer produced by same, method for manufacturing gas separation membrane, and gas separation membrane
US-2021060500-A1 · Mar 4, 2021 · US
Porous membrane and filter cartridge
US-2021023510-A1 · Jan 28, 2021 · US
Hybrid materials for organic solvent nanofiltration and pervaporation membranes
US-2021008506-A1 · Jan 14, 2021 · US
Separation membrane
US-10799837-B2 · Oct 13, 2020 · US
Porous hollow fiber membrane and method for producing same
US-2020289991-A1 · Sep 17, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/12?
- CPC B01D71/12 is the Cooperative Patent Classification code for “Cellulose derivatives.”
- How many patents are filed under CPC B01D71/12 (Cellulose derivatives)?
- Our database includes 62 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/12 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).