Manufacturing method of meltblown fiber membrane
US-2024181376-A1 · Jun 6, 2024 · US
Polyesters
Polyesters · 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 | B01D71/48 |
| Official title | Polyesters |
| Display label | Polyesters |
| Total patents | 228 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 23 |
| 2016 | 20 |
| 2017 | 19 |
| 2018 | 17 |
| 2019 | 16 |
| 2020 | 29 |
| 2021 | 23 |
| 2022 | 22 |
| 2023 | 17 |
| 2024 | 21 |
| 2025 | 17 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for producing a filter intended to filter nanoparticles, obtained filter and associated method for the collection and quantitative analysis of nanoparticles
US-9833750-B2 · Dec 5, 2017 · US
Polymer film, waterproof sound-permeable membrane, waterproof sound-permeable member, electronic device, electronic device case, waterproof sound transmission structure, waterproof gas-permeable membrane, waterproof gas-permeable member, waterproof ventilation structure, suction sheet, method for holding workpiece by suction on suction unit, method for producing ceramic capacitor, optical film, optical member, and composition
US-2017292000-A1 · Oct 12, 2017 · US
Composite semipermeable membrane and method for producing the same, spiral wound separation membrane element
US-2017282129-A1 · Oct 5, 2017 · US
Curable Compositions and Membranes
US-2017246594-A1 · Aug 31, 2017 · US
Permeation side flow path material for spiral membrane element and method for manufacturing same
US-2017239626-A1 · Aug 24, 2017 · US
Gas separation membrane
US-9724900-B2 · Aug 8, 2017 · US
Method for manufacturing laminate, and laminate
US-2017203559-A1 · Jul 20, 2017 · US
Composite semipermeable membrane
US-2017203262-A1 · Jul 20, 2017 · US
Process for improved water flux through a tfc membrane
US-2017197182-A1 · Jul 13, 2017 · US
Curable compositions and membranes
US-9675940-B2 · Jun 13, 2017 · US
Composite semi-permeable membrane useful for water desalination
US-2017144110-A1 · May 25, 2017 · US
Water-proof air-permeable filter and use of the same
US-9636616-B2 · May 2, 2017 · US
Water separation composite membrane
US-2017113190-A1 · Apr 27, 2017 · US
Surface functionalization of metal organic frameworks for mixed matrix membranes
US-9597643-B1 · Mar 21, 2017 · US
Nanoporous membranes and methods for making the same
US-2017043300-A1 · Feb 16, 2017 · US
Separation membrane, method of producing the same and separation membrane module using the separation membrane
US-9561478-B2 · Feb 7, 2017 · US
Separation membrane for water treatment and production method for same
US-9527042-B2 · Dec 27, 2016 · US
Nanoporous membranes and methods for making the same
US-9505192-B2 · Nov 29, 2016 · US
Composite membranes and methods of use
US-2016325229-A1 · Nov 10, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/48?
- CPC B01D71/48 is the Cooperative Patent Classification code for “Polyesters.”
- How many patents are filed under CPC B01D71/48 (Polyesters)?
- Our database includes 228 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/48 growing?
- Publication counts under this code: 21 in 2024 vs 17 in 2025 (latest complete years).