Purification of (meth)acrylic esters by membrane separation dehydration
US-2016376217-A1 · Dec 29, 2016 · US
Molecular sieves (carbon B01D71/021)
Molecular sieves (carbon B01D71/021) · 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 | B01D71/028 |
| Official title | {Molecular sieves (carbon B01D71/021)} |
| Display label | Molecular sieves (carbon B01D71/021) |
| Total patents | 468 |
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 | 25 |
| 2016 | 35 |
| 2017 | 38 |
| 2018 | 41 |
| 2019 | 55 |
| 2020 | 51 |
| 2021 | 69 |
| 2022 | 49 |
| 2023 | 45 |
| 2024 | 34 |
| 2025 | 23 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Monolithic separation membrane structure, and method for producing monolithic separation membrane structure
US-2016375405-A1 · Dec 29, 2016 · US
Carbon molecular sieve membranes made from 6FDA and DETDA-based precursor polymers
US-9527045-B2 · Dec 27, 2016 · US
Defect-free carbon molecular sieve membranes with enhanced selectivity and aging resistance and the method of making the same
US-2016367935-A1 · Dec 22, 2016 · US
Ddr zeolite seed crystal, method for producing same, and method for producing ddr zeolite membrane
US-2016361691-A1 · Dec 15, 2016 · US
Ultra-selective carbon molecular sieve membranes and methods of making
US-2016346740-A1 · Dec 1, 2016 · US
Composite oxygen transport membrane
US-9492784-B2 · Nov 15, 2016 · US
Membrane device and process for mass exchange, separation, and filtration
US-9492795-B2 · Nov 15, 2016 · US
Composite oxygen transport membrane
US-9486735-B2 · Nov 8, 2016 · US
Processes using molecular sieve SSZ-100
US-9468917-B2 · Oct 18, 2016 · US
Selective catalytic reduction catalyst system
US-9468915-B2 · Oct 18, 2016 · US
Zeolite-like metal-organic framework membrane
US-2016296883-A1 · Oct 13, 2016 · US
Multi-channel hollow fiber
US-2016288058-A1 · Oct 6, 2016 · US
Vacuum-assisted process for preparing an ion-exchanged zeolite membrane
US-2016279625-A1 · Sep 29, 2016 · US
Zeolite structure and manufacturing method thereof
US-9452936-B2 · Sep 27, 2016 · US
Compatibilized immiscible polymer blends and molecular sieve membranes thereof
US-2016263534-A1 · Sep 15, 2016 · US
High permeate flux reverse osmosis membrane including surface-treated zeolite and method of manufacturing the same
US-9415351-B2 · Aug 16, 2016 · US
Blood purification membrane, method for manufacturing blood purification membrane, and dialysis device
US-2016199789-A1 · Jul 14, 2016 · US
Manufacturing carbon molecular sieve membranes using a pyrolysis atmosphere comprising sulfur-containing compounds
US-2016184776-A1 · Jun 30, 2016 · US
Metal-organic framework supported on porous polymer
US-9375678-B2 · Jun 28, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/028?
- CPC B01D71/028 is the Cooperative Patent Classification code for “Molecular sieves (carbon B01D71/021).”
- How many patents are filed under CPC B01D71/028 (Molecular sieves (carbon B01D71/021))?
- Our database includes 468 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/028 growing?
- Publication counts under this code: 34 in 2024 vs 23 in 2025 (latest complete years).