Membranes for gas separation
US-12023633-B2 · Jul 2, 2024 · US
Carbon nanotubes
Carbon nanotubes · 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 | B01D71/0212 |
| Official title | {Carbon nanotubes} |
| Display label | Carbon nanotubes |
| Total patents | 210 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 12 |
| 2016 | 13 |
| 2017 | 17 |
| 2018 | 24 |
| 2019 | 18 |
| 2020 | 19 |
| 2021 | 20 |
| 2022 | 15 |
| 2023 | 17 |
| 2024 | 37 |
| 2025 | 14 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Porous membrane and membrane support with integrated high permeability barrier
US-2018319943-A1 · Nov 8, 2018 · US
Porous graphene based composite membranes for nanofiltration, desalination, and pervaporation
US-10112150-B2 · Oct 30, 2018 · US
Polyvinylidene difluoride membrane, manufacturing method thereof, and purifying brine method thereof
US-2018257043-A1 · Sep 13, 2018 · US
Ultra-breathable and protective membranes with sub-5 nm carbon nanotube pores
US-2018236287-A1 · Aug 23, 2018 · US
Gas sensor and method of manufacturing the same
US-2018224416-A1 · Aug 9, 2018 · US
Compositions of graphene materials with metal nanostructures and microstructures and methods of making and using including pressure sensors
US-2018207590-A1 · Jul 26, 2018 · US
Thin Film Composites Having Graphene Oxide Quantum Dots
US-2018207591-A1 · Jul 26, 2018 · US
Porous electrolyte membrane, manufacturing process thereof and electrochemical devices comprising same
US-2018115014-A1 · Apr 26, 2018 · US
Antifouling membrane filtration system
US-2018104653-A1 · Apr 19, 2018 · US
Production system for composite porous solid articles
US-2018104654-A1 · Apr 19, 2018 · US
Porous separation article
US-2018099250-A1 · Apr 12, 2018 · US
System for producing carbon nanotubes from combustion engine exhausts
US-9932236-B2 · Apr 3, 2018 · US
Asymmetric Modified Carbon Molecular Sieve Hollow Fiber Membranes Having Improved Permeance
US-2018071691-A1 · Mar 15, 2018 · US
Systems and methods for continuous manufacture of buckypaper materials
US-9909259-B2 · Mar 6, 2018 · US
Membrane surface activation to eliminate fouling and concentration polarization in water purification systems
US-2018056248-A1 · Mar 1, 2018 · US
Reverse osmosis composite membrane and method for manufacturing reverse osmosis composite membrane
US-2018043312-A1 · Feb 15, 2018 · US
Membrane for filtrating water
US-9873092-B2 · Jan 23, 2018 · US
Porous materials and methods including nanoporous materials for water filtration
US-2017368508-A1 · Dec 28, 2017 · US
Porous separation article
US-9839881-B2 · Dec 12, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/0212?
- CPC B01D71/0212 is the Cooperative Patent Classification code for “Carbon nanotubes.”
- How many patents are filed under CPC B01D71/0212 (Carbon nanotubes)?
- Our database includes 210 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/0212 growing?
- Publication counts under this code: 37 in 2024 vs 14 in 2025 (latest complete years).