Porous Polymer Membranes Comprising Vertically Aligned Carbon Nanotubes, and Methods of Making and Using Same
US-2020407525-A1 · Dec 31, 2020 · US
Polyureas; Polyurethanes
Polyureas; Polyurethanes · 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 | B01D71/54 |
| Official title | Polyureas; Polyurethanes |
| Display label | Polyureas; Polyurethanes |
| Total patents | 163 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 14 |
| 2017 | 7 |
| 2018 | 13 |
| 2019 | 13 |
| 2020 | 22 |
| 2021 | 23 |
| 2022 | 20 |
| 2023 | 12 |
| 2024 | 11 |
| 2025 | 13 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Semipermeable membrane and preparation method thereof
US-10828608-B2 · Nov 10, 2020 · US
Latent and sensible cooling membrane heat pump
US-10502438-B2 · Dec 10, 2019 · US
High selectivity poly(imide-urethane) membranes for gas separations
US-2019314771-A1 · Oct 17, 2019 · US
Semipermeable membrane and preparation method thereof
US-2019282967-A1 · Sep 19, 2019 · US
Electrospun high temperature elastomer materials for water filter media
US-2019201822-A1 · Jul 4, 2019 · US
Composition comprising aromatic and fluorinated polymers and use thereof
US-2019177539-A1 · Jun 13, 2019 · US
Porous membranes
US-2019168174-A1 · Jun 6, 2019 · US
Porous thermoplastic membranes
US-2019112474-A1 · Apr 18, 2019 · US
Polysulfone-Urethane Copolymer, Membranes And Products Incorporating Same, And Methods For Making And Using Same
US-2019106545-A1 · Apr 11, 2019 · US
Techniques to improve polyurethane membranes for implantable glucose sensors
US-2019083018-A1 · Mar 21, 2019 · US
Microporous Membrane And Methods To Make Same
US-2019076787-A1 · Mar 14, 2019 · US
Dead end membrane gas separation process
US-2019060835-A1 · Feb 28, 2019 · US
Three-dimensional porous polyurethane scaffold for repairing central nerve injuries and preparation method thereof
US-2019046685-A1 · Feb 14, 2019 · US
Water-tight breathable membrane
US-2019001279-A1 · Jan 3, 2019 · US
Techniques to improve polyurethane membranes for implantable glucose sensors
US-10154807-B2 · Dec 18, 2018 · US
Method of Production of Nanoporous Membranes for Water Purification from Metal Ions at Low Differential Pressures
US-2018290108-A1 · Oct 11, 2018 · US
Solvent composition comprising a mixture of a molecule having a sulphoxide function and a molecule having an amide function
US-2018201784-A1 · Jul 19, 2018 · US
Latent and sensible cooling membrane heat pump
US-2018180307-A1 · Jun 28, 2018 · US
Porous Air Permeable Polytetrafluoroethylene Composites with Improved Mechanical and Thermal Properties
US-2018163089-A1 · Jun 14, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/54?
- CPC B01D71/54 is the Cooperative Patent Classification code for “Polyureas; Polyurethanes.”
- How many patents are filed under CPC B01D71/54 (Polyureas; Polyurethanes)?
- Our database includes 163 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/54 growing?
- Publication counts under this code: 11 in 2024 vs 13 in 2025 (latest complete years).