Composite semipermeable membrane
US-9827536-B2 · Nov 28, 2017 · US
Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of groups B01D71/26-B01D71/42
Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of groups B01D71/26-B01D71/42 · 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 | B01D71/44 |
| Official title | Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of groups B01D71/26-B01D71/42 |
| Display label | Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of groups B01D71/26-B01D71/42 |
| Total patents | 241 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 19 |
| 2016 | 20 |
| 2017 | 24 |
| 2018 | 21 |
| 2019 | 18 |
| 2020 | 32 |
| 2021 | 27 |
| 2022 | 35 |
| 2023 | 16 |
| 2024 | 14 |
| 2025 | 13 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Mixed matrix polymer compositions
US-9815032-B2 · Nov 14, 2017 · US
Curable composition and cured polymer product
US-9795955-B2 · Oct 24, 2017 · US
Curable Compositions and Membranes
US-2017246594-A1 · Aug 31, 2017 · US
Forward osmosis membrane and forward osmosis treatment system
US-2017225131-A1 · Aug 10, 2017 · US
Hydrophilically modified fluorinated membrane (II)
US-9724650-B2 · Aug 8, 2017 · US
Gas separation membrane
US-9724900-B2 · Aug 8, 2017 · US
Hydrophilically modified fluorinated membrane (i)
US-2017197184-A1 · Jul 13, 2017 · US
Polymer and method for preparing the same
US-2017182487-A1 · Jun 29, 2017 · US
Curable compositions and membranes
US-9675940-B2 · Jun 13, 2017 · US
Asymmetric articles with a porous substrate and a polymeric coating extending into the substrate and methods of making the same
US-2017144111-A1 · May 25, 2017 · US
Hydrophilically modified fluorinated membrane (IV)
US-9643130-B2 · May 9, 2017 · US
Hydrophilically modified fluorinated membrane (I)
US-9636641-B2 · May 2, 2017 · US
Hydrophilically modified fluorinated membrane (V)
US-9630151-B2 · Apr 25, 2017 · US
Fluorinated copolymer and ion exchange membrane
US-9604180-B2 · Mar 28, 2017 · US
Membrane comprising self-assembled block copolymer and process for producing the same by spray coating (IIc)
US-9604181-B2 · Mar 28, 2017 · US
Self-assembled structure and membrane comprising block copolymer and process for producing the same by spin coating (VIa)
US-9598543-B2 · Mar 21, 2017 · US
Separation membrane, method of producing the same and separation membrane module using the separation membrane
US-9561478-B2 · Feb 7, 2017 · US
A method for the high-throughput preparation of carbon nanotube hollow fiber membranes
US-2017014777-A1 · Jan 19, 2017 · US
Nanoporous films derived from polycyclo-olefinic block polymers
US-2017015790-A1 · Jan 19, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/44?
- CPC B01D71/44 is the Cooperative Patent Classification code for “Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of groups B01D71/26-B01D71/42.”
- How many patents are filed under CPC B01D71/44 (Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of groups B01D71/26-B01D71/42)?
- Our database includes 241 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/44 growing?
- Publication counts under this code: 14 in 2024 vs 13 in 2025 (latest complete years).