Monolithic separation membrane structure, method for producing monolithic separation membrane structure, and method for dehydrating
US-2016375406-A1 · Dec 29, 2016 · US
Carbon
Carbon · 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 | B01D71/021 |
| Official title | {Carbon} |
| Display label | Carbon |
| Total patents | 653 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 38 |
| 2016 | 45 |
| 2017 | 64 |
| 2018 | 80 |
| 2019 | 82 |
| 2020 | 82 |
| 2021 | 79 |
| 2022 | 59 |
| 2023 | 45 |
| 2024 | 40 |
| 2025 | 36 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Membranes comprising graphene
US-2016354729-A1 · Dec 8, 2016 · US
Two-dimensional materials and uses thereof
US-2016339160-A1 · Nov 24, 2016 · US
Carbon nanotube membrane systems and methods of synthesis
US-2016332121-A1 · Nov 17, 2016 · US
Separation membrane manufacturing method
US-9486744-B2 · Nov 8, 2016 · US
Composite Membrane
US-2016317978-A1 · Nov 3, 2016 · US
Osmosis
US-2016297693-A1 · Oct 13, 2016 · US
Planar filtration and selective isolation and recovery device
US-9463421-B2 · Oct 11, 2016 · US
Compatibilized immiscible polymer blends and molecular sieve membranes thereof
US-2016263534-A1 · Sep 15, 2016 · US
Hollow fiber membrane module
US-9427708-B2 · Aug 30, 2016 · US
Manufacturing carbon molecular sieve membranes using a pyrolysis atmosphere comprising sulfur-containing compounds
US-2016184775-A1 · Jun 30, 2016 · US
Manufacturing carbon molecular sieve membranes using a pyrolysis atmosphere comprising sulfur-containing compounds
US-2016184776-A1 · Jun 30, 2016 · US
Carbon membrane, process for the manufacture of carbon membranes and use thereof
US-2016175767-A1 · Jun 23, 2016 · US
Dryer and water recovery/purification unit employing graphene oxide or perforated graphene monolayer membranes
US-9358508-B2 · Jun 7, 2016 · US
Acidic-gas separation module
US-2016151740-A1 · Jun 2, 2016 · US
Hollow fiber carbon molecular sieve membrane and preparation and use thereof
US-9346011-B2 · May 24, 2016 · US
Aircraft fuel tank flammability reduction methods and systems
US-9327243-B2 · May 3, 2016 · US
Method of making and using an electrically conductive composite membrane
US-2016115647-A1 · Apr 28, 2016 · US
Graphene nanotube array for gas filtration
US-9278318-B2 · Mar 8, 2016 · US
Emission reduction from mobile sources by on-board carbon dioxide conversion to fuel
US-9267429-B2 · Feb 23, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/021?
- CPC B01D71/021 is the Cooperative Patent Classification code for “Carbon.”
- How many patents are filed under CPC B01D71/021 (Carbon)?
- Our database includes 653 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/021 growing?
- Publication counts under this code: 40 in 2024 vs 36 in 2025 (latest complete years).