Separation membrane and method for producing separation membrane
US-11794150-B2 · Oct 24, 2023 · US
Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only
Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only · 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 | B01D71/66 |
| Official title | Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only |
| Display label | Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only |
| Total patents | 71 |
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 | 8 |
| 2016 | 6 |
| 2017 | 13 |
| 2018 | 4 |
| 2019 | 9 |
| 2020 | 4 |
| 2021 | 7 |
| 2022 | 4 |
| 2023 | 8 |
| 2024 | 4 |
| 2025 | 1 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Wound-pleated filters and related methods
US-2023233978-A1 · Jul 27, 2023 · US
Polyphenylene-based semipermeable membrane and manufacturing method therefor
US-2023149859-A1 · May 18, 2023 · US
Method for producing treatment liquid
US-2023143521-A1 · May 11, 2023 · US
Method of preparation of conductive polymer/carbon nanotube composite nanofiltration membrane and the use thereof
US-11583808-B2 · Feb 21, 2023 · US
Biotin-containing monomers and articles formed therefrom
US-2022396584-A1 · Dec 15, 2022 · US
Porous articles, processes for their preparation and uses thereof
US-2022362718-A1 · Nov 17, 2022 · US
Nanostructured membrane filter system for rapid purification of water
US-2022184562-A1 · Jun 16, 2022 · US
Gas separation membrane using furan-based polymers
US-2022062817-A1 · Mar 3, 2022 · US
Films derived from two or more chemically distinct block copolymers, methods of making same, and uses thereof
US-11180616-B2 · Nov 23, 2021 · US
Pore-filled ion exchange polyelectrolyte composite membrane from which surface ion exchange polyelectrolyte has been removed and method for manufacturing same
US-2021237001-A1 · Aug 5, 2021 · US
Systems and methods for removing organic compounds from steam
US-2021239314-A1 · Aug 5, 2021 · US
Mixed matrix membrane with graphene oxide and polyether amide polymer for dehydration of gas
US-2021162353-A1 · Jun 3, 2021 · US
Acid gas separation membrane and acid gas separation method using same, acid gas separation module, and acid gas separation apparatus
US-10987622-B2 · Apr 27, 2021 · US
Method of making reaction induced phase separation membranes and uses thereof
US-10960359-B2 · Mar 30, 2021 · US
Method of preparation of conductive polymer/carbon nanotube composite nanofiltration membrane and the use thereof
US-2021008503-A1 · Jan 14, 2021 · US
Films derived from two or more chemically distinct block copolymers, methods of making same, and uses thereof
US-2020216618-A1 · Jul 9, 2020 · US
Gas separation membrane using furan-based polymers
US-2020179869-A1 · Jun 11, 2020 · US
Optimized hemodialyzer for blood purification
US-2020147287-A1 · May 14, 2020 · US
Films derived from two or more chemically distinct block copolymers, methods of making same, and uses thereof
US-10584215-B2 · Mar 10, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/66?
- CPC B01D71/66 is the Cooperative Patent Classification code for “Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only.”
- How many patents are filed under CPC B01D71/66 (Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only)?
- Our database includes 71 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/66 growing?
- Publication counts under this code: 4 in 2024 vs 1 in 2025 (latest complete years).