Porous membranes for high pressure filtration
US-12064731-B2 · Aug 20, 2024 · US
Three or more layers
Three or more layers · 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 | B01D69/1216 |
| Official title | {Three or more layers} |
| Display label | Three or more layers |
| Total patents | 780 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 56 |
| 2016 | 57 |
| 2017 | 80 |
| 2018 | 89 |
| 2019 | 86 |
| 2020 | 98 |
| 2021 | 77 |
| 2022 | 63 |
| 2023 | 55 |
| 2024 | 58 |
| 2025 | 48 |
| 2026 | 13 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Membranes for gas separation
US-12023633-B2 · Jul 2, 2024 · US
Composite oxygen transport membrane
US-9486735-B2 · Nov 8, 2016 · US
Multilayered charge-mosaic membrane and manufacturing method therefor
US-9346020-B2 · May 24, 2016 · US
Systems, compositions, and methods for fluid purification
US-9216390-B2 · Dec 22, 2015 · US
Polyamide water-treatment separation membrane having properties of high salt rejection and high flux and manufacturing method thereof
US-2015352501-A1 · Dec 10, 2015 · US
Composite semipermeable membrane
US-2015343393-A1 · Dec 3, 2015 · US
Hydrogen separation membrane, and method for manufacturing same
US-2015328590-A1 · Nov 19, 2015 · US
Filtration systems and membranes with enhanced flux and method for their preparation
US-2015328588-A1 · Nov 19, 2015 · US
Stacked two-dimensional materials and methods for producing structures incorporating same
US-2015321147-A1 · Nov 12, 2015 · US
High permeate flux reverse osmosis membrane including surface-treated zeolite and method of manufacturing the same
US-2015321151-A1 · Nov 12, 2015 · US
Separation membrane and separation membrane element
US-2015321148-A1 · Nov 12, 2015 · US
Composite separation membrane
US-2015314245-A1 · Nov 5, 2015 · US
Nanosieve composite membrane
US-2015306547-A1 · Oct 29, 2015 · US
Composite polyamide membrane made via interfacial polymerization using a blend of non-polar solvents
US-2015306548-A1 · Oct 29, 2015 · US
Graphene membrane and method for manufacturing the same
US-2015306550-A1 · Oct 29, 2015 · US
Composite polyamide membrane made using substituted benzamide monomer
US-2015298066-A1 · Oct 22, 2015 · US
Gas separation membrane
US-2015298436-A1 · Oct 22, 2015 · US
Separation membrane and separation membrane element
US-2015298064-A1 · Oct 22, 2015 · US
Hollow porous membrane
US-2015283517-A1 · Oct 8, 2015 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D69/1216?
- CPC B01D69/1216 is the Cooperative Patent Classification code for “Three or more layers.”
- How many patents are filed under CPC B01D69/1216 (Three or more layers)?
- Our database includes 780 publications tagged with this CPC code.
- Is patent activity under CPC B01D69/1216 growing?
- Publication counts under this code: 58 in 2024 vs 48 in 2025 (latest complete years).