Method for manufacturing laminate, and laminate
US-10137665-B2 · Nov 27, 2018 · US
Polyamide-imides
Polyamide-imides · 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 | B01D71/641 |
| Official title | {Polyamide-imides} |
| Display label | Polyamide-imides |
| Total patents | 144 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 17 |
| 2016 | 17 |
| 2017 | 17 |
| 2018 | 21 |
| 2019 | 14 |
| 2020 | 18 |
| 2021 | 12 |
| 2022 | 9 |
| 2023 | 5 |
| 2024 | 8 |
| 2025 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Highly crosslinked hybrid polyimide-silsesquioxane membranes
US-10052592-B2 · Aug 21, 2018 · US
Gas separation membrane module and method for gas separation
US-2018221812-A1 · Aug 9, 2018 · US
Porous Air Permeable Polytetrafluoroethylene Composites with Improved Mechanical and Thermal Properties
US-2018163089-A1 · Jun 14, 2018 · US
Antitelescoping device and clamp for spiral wound modules comprising a vent
US-9925498-B2 · Mar 27, 2018 · US
Systems, devices and methods for molecular separation
US-2018056246-A1 · Mar 1, 2018 · US
Method for purifying liquid, method for producing chemical solution or cleaning solution, filter medium, and filter device
US-2018028983-A1 · Feb 1, 2018 · US
Polyimide and/or polyamideimide porous body and method for manufacturing same, method for separation and/or adsorption, separation material, adsorption material, filter media, laminate, and filter device
US-2018021739-A1 · Jan 25, 2018 · US
Porous air permeable polytetrafluoroethylene composites with improved mechanical and thermal properties
US-9862859-B2 · Jan 9, 2018 · US
Polymer-ion-permeable membrane, composite-ion-permeable membrane, battery electrolyte membrane, and electrode composite
US-2017320021-A1 · Nov 9, 2017 · US
Method for synthesis of thin film composite membranes
US-9808768-B2 · Nov 7, 2017 · US
Membranes
US-9808771-B2 · Nov 7, 2017 · US
Gas Separation Membranes with Intermixed Layers
US-2017296981-A1 · Oct 19, 2017 · US
Method for producing porous polyimide film
US-2017256766-A1 · Sep 7, 2017 · US
Gas separation membranes with intermixed layers
US-9731248-B2 · Aug 15, 2017 · US
Composite hollow fiber membranes useful for CO2 removal from natural gas
US-9718031-B2 · Aug 1, 2017 · US
Gas separation membrane module and gas separation method
US-9718023-B2 · Aug 1, 2017 · US
Method for manufacturing laminate, and laminate
US-2017203559-A1 · Jul 20, 2017 · US
Curable compositions and membranes
US-9700848-B2 · Jul 11, 2017 · US
Composite gas separation membranes with dialkysiloxane intermediate layer
US-9694325-B2 · Jul 4, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/641?
- CPC B01D71/641 is the Cooperative Patent Classification code for “Polyamide-imides.”
- How many patents are filed under CPC B01D71/641 (Polyamide-imides)?
- Our database includes 144 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/641 growing?
- Publication counts under this code: 8 in 2024 vs 6 in 2025 (latest complete years).