Base films for impregnation, improved impregnated products, and related methods
US-2020277465-A1 · Sep 3, 2020 · US
Polycarbonates
Polycarbonates · 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 | B01D71/50 |
| Official title | Polycarbonates |
| Display label | Polycarbonates |
| Total patents | 110 |
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 | 5 |
| 2016 | 10 |
| 2017 | 12 |
| 2018 | 12 |
| 2019 | 14 |
| 2020 | 13 |
| 2021 | 14 |
| 2022 | 13 |
| 2023 | 4 |
| 2024 | 5 |
| 2025 | 5 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Systems and methods for platelet concentration with a spinning membrane separator
US-10729829-B2 · Aug 4, 2020 · US
Hollow fiber membrane for dehydration of organic solvents via pervaporation process and a method of fabricating the same
US-10722850-B2 · Jul 28, 2020 · US
Container for a filtration assembly
US-2020188906-A1 · Jun 18, 2020 · US
Methods for purification of messenger rna
US-2020095571-A1 · Mar 26, 2020 · US
Multiple membrane separation process using glassy polymeric membrane and rubbery polymeric membrane
US-10569218-B2 · Feb 25, 2020 · US
Hollow Fiber Membrane Having Improved Diffusion Properties
US-2020030751-A1 · Jan 30, 2020 · US
Biological fluid separation device
US-10493409-B2 · Dec 3, 2019 · US
Additive fabrication process with a structural material comprising an ir absorber
US-2019344555-A1 · Nov 14, 2019 · US
Fermentation hydrocarbon gas products separation via membrane
US-10427996-B2 · Oct 1, 2019 · US
Methods for cell washing with on-line dilution of cell feed
US-10400216-B2 · Sep 3, 2019 · US
Hierarchical porous membrane for emulsion separation
US-10384961-B2 · Aug 20, 2019 · US
Selectively-permeable membrane
US-2019232233-A1 · Aug 1, 2019 · US
Composite membrane, semi-permeable membrane including the composite membrane, and water treatment device including the semi-permeable membrane
US-10335743-B2 · Jul 2, 2019 · US
System and method for manufacturing a membrane filter
US-2019176093-A1 · Jun 13, 2019 · US
Whole blood separation system
US-10300189-B2 · May 28, 2019 · US
Self-wetting porous membranes (II)
US-10239023-B2 · Mar 26, 2019 · US
Flux-enhanced hierarchical porous membrane for oil-water nanoemulsion separation
US-2019076794-A1 · Mar 14, 2019 · US
Techniques for performing diffusion-based filtration using nanoporous membranes and related systems and methods
US-2019070566-A1 · Mar 7, 2019 · US
Semipermeable membrane and method of manufacturing the same
US-2019015547-A1 · Jan 17, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/50?
- CPC B01D71/50 is the Cooperative Patent Classification code for “Polycarbonates.”
- How many patents are filed under CPC B01D71/50 (Polycarbonates)?
- Our database includes 110 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/50 growing?
- Publication counts under this code: 5 in 2024 vs 5 in 2025 (latest complete years).