Robust nanofilms prepared from sustainable materials
US-2023271145-A1 · Aug 31, 2023 · US
Natural macromolecular material or derivatives thereof (B01D71/08, B01D71/24 take precedence)
Natural macromolecular material or derivatives thereof (B01D71/08, B01D71/24 take precedence) · 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 | B01D71/74 |
| Official title | Natural macromolecular material or derivatives thereof (B01D71/08, B01D71/24 take precedence) |
| Display label | Natural macromolecular material or derivatives thereof (B01D71/08, B01D71/24 take precedence) |
| Total patents | 81 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 13 |
| 2020 | 9 |
| 2021 | 9 |
| 2022 | 13 |
| 2023 | 4 |
| 2024 | 15 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Silk nanofibrils and uses thereof
US-11643444-B2 · May 9, 2023 · US
High selectivity membranes for hydrogen sulfide and carbon dioxide removal from natural gas
US-2023018173-A1 · Jan 19, 2023 · US
Low temperature separation method using 2d material-based nanocomposite coating
US-2022410071-A1 · Dec 29, 2022 · US
Soy proteins for preparation of gels, fibers and films
US-2022378713-A1 · Dec 1, 2022 · US
High selectivity membranes for hydrogen sulfide and carbon dioxide removal from natural gas
US-11471839-B2 · Oct 18, 2022 · US
Bio-based polysulfones and uses thereof
US-2022251300-A1 · Aug 11, 2022 · US
Method for producing permselective membrane
US-2022193619-A1 · Jun 23, 2022 · US
Synthesis of biomimetic cell wall structure
US-2022118094-A1 · Apr 21, 2022 · US
Super-hydrophilic, super-oleophobic membranes comprising carbohydrate derivatives
US-2022118410-A1 · Apr 21, 2022 · US
Fabrication of aquaporin-based biomimetic membrane
US-2022088544-A1 · Mar 24, 2022 · US
Materials for reducing acids from liquid phases
US-2022056181-A1 · Feb 24, 2022 · US
Biomimetic multilayer compositions
US-11247181-B2 · Feb 15, 2022 · US
Selectively permeable graphene oxide membrane
US-2022040645-A1 · Feb 10, 2022 · US
Advanced filtration membranes using chitosan and graphene oxide
US-11235291-B2 · Feb 1, 2022 · US
Fluoride removal process
US-2022009798-A1 · Jan 13, 2022 · US
Semipermeable membrane and uses thereof
US-2021403850-A1 · Dec 30, 2021 · US
Porous film, separator including the same, electrochemical device including separator, and method of preparing porous film
US-11211671-B2 · Dec 28, 2021 · US
Selectively permeable graphene oxide membrane
US-11117101-B2 · Sep 14, 2021 · US
Deterministic Stepping of Polymers Through A Nanopore
US-2021278392-A1 · Sep 9, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/74?
- CPC B01D71/74 is the Cooperative Patent Classification code for “Natural macromolecular material or derivatives thereof (B01D71/08, B01D71/24 take precedence).”
- How many patents are filed under CPC B01D71/74 (Natural macromolecular material or derivatives thereof (B01D71/08, B01D71/24 take precedence))?
- Our database includes 81 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/74 growing?
- Publication counts under this code: 15 in 2024 vs 5 in 2025 (latest complete years).